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product structure silicon monolithic integrated circuit this product is not designed for pr otection against radioactive rays . 1/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 tsz22111 ? 14 ? 001 www.rohm.com datashee t quasi-resonant control dc/dc converter and power factor correction converter ic for ac/dc converter BM1051F general description BM1051F is compounded lsi of power factor correction converter (pfc) for harmonic solution and dc/dc converter (dc/dc). because dc/dc operates on quasi-resonant method, dc/dc contributes to low emi. BM1051F built in a hv starter circuit that tolerates 650v. because of putting the current sense resistors externally both the pfc part and the dc/dc part, ic enables power supply design free. in the pfc part, ic adopts peak current control operation. suitable application is proposed by a various protection circuit, such as the multiplier with a revision circuit on the ac voltage falls, the load regulation revision circuit, and the maximum power feed-forward circuit, etc. the quasi-resonant system of a dc/dc part contributes to low emi because pfc operates by soft switching. a burst mode is built in, so the power is reduced at light load. various protection functions, such as a soft start function, a burst function, an over-current limiting for every cycle, overvoltage protection, and over current protection, are built in. the pin for communicated cont rol with a controller and the external stop pin are prepared; it proposes the system that can be adapted for various applications. basic specifications ? operating power supply voltage range: vcc 8.0 to 24.0v ? operating current: qr on (pfc off) 1.20ma(pulse on) qr on (pfc off) 1.00ma(pulse off) qr on (pfc on) 1.80ma(pulse on) ? oscillation frequency qr part :120khz(fb=2.0v typ) ? operating temperature: -40 to +85 typical application circuit(s) features ? quasi-resonant circuit + pfc circuit ? built-in hv starter circuit ? low consumption current (typ.10ua) when starter circuit is off. ? quasi resonant circuit max operating frequency(120khz) frequency reduction function over-current limiting variable function pulse-by-pulse over-current protection circuit built-in soft start voltage protection function (brown out) during low input zt pin over voltage protection output overload protection (auto recovery /latch switching enabled) 250nsec leading-edge blanking ? power factor correction circui t peak current control (65khz) per-cycle over current protection circuit maximum power revision the multiplier with a revision circuit when the ac voltage falls the load change measure circuit ? selectable protection method by latch/autor terminal. latch/autor=h : latch latch/autor=l : auto recovery ? external stop function (comp pin) ? ac input voltage stop detected function (acdet) ? built-in pfc stop terminal (pfcon/off) package(s) sop24 15.0mm 5.40mm 1.80mm pitch1.27mm (typ.) (typ.) (typ.) typ. applications tv, ac adapters, printers, led lighting figure 1. application circuit ac 85-265vac fuse + - filter diode bridge bm1051 p_cs p_vs p_vs ? dc/dc 4ch led? feti dcdc o bd9212f dcd c bd92xx qr_zt qr_zt p_out p_out vcc qr_fb vcc qr_cs qr_cs qr_fb p_cs
datasheet d a t a s h e e t 2/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F absolute maximum ratings (ta = 25 ) parameter symbol rating unit conditions maximum applied voltage 1 v max1 650 v vh_in maximum applied voltage 2 v max2 30 v vcc, qr_sel maximum applied voltage 3 v max3 5.5 v p_bo, p_vseo, p_vs, p_bopk p_cs,pfcon/off,comp, acdet, actimer,qr_cs, qr_zt, qr_fb,latch/autor, vref maximum applied voltage 4 v max4 15 v gclamp, p_out, qr_out output peak current 1 i oh -0.5 a qr_out, p_out output peak current 2 i ol 1.0 a qr_out, p_out qr_zt pin current 1 i szt 1 -2.0 ma qr_zt pin current 2 i szt2 3.0 ma allowable dissipation p d 687.6 (note1) mw operating temperature range t opr -40 +85 o c maximum junction temperature t jmax 150 o c storage temperature range t str -55 +150 o c (note1) when mounted (on 70 mm 70 mm, 1.6 mm thick, glass epoxy on single-layer substrate). reduce to 5.5 mw/ ? c when ta = 25 ? c or above. operating conditions (ta = 25 ) parameter symbol rating unit conditions power supply voltage range 1 vcc 8.0 24.0 v vcc power supply voltage range 2 vh_in 80 600 v vh_in power supply voltage range 3 p_bo 0.0 1.8 v p_bo
datasheet d a t a s h e e t 3/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F electrical characteristics (unless otherwi se noted, ta=25, vh_in=320vdc, vcc=12v) parameter symbol specifications unit conditions minimum standard maximum circuit current circuit current (on) 1 i on1 0.700 1.200 1.700 ma vcc=12.0v (qr=on, pfc=off) qr_fb=1.0v (during pulse operation) circuit current (on) 2 i on2 0.700 1.000 1.300 ma vcc=12.0v (qr =on, pfc=off) qr_fb=vref (during pulse operation when off) circuit current (on) 3 i on3 0.800 1.800 2.800 ma vcc=12.0v (qr =on, pfc=on) qr_fb=1.0v (during pulse operation) start circuit block start current 1 i start1 0.100 0.500 1.000 ma vcc= 0v start current 2 i start2 1.000 3.000 5.000 ma vcc=10v off current i start3 - 10 16 ua input current from vh_in terminal after releasing uvlo vh voltage switched start current v sc 0.400 0.800 1.400 v vref block vref output voltage v ref1 3.500 4.000 4.500 v vref output capacitor c ref 0.68 1.00 2.20 uf gclamp voltage 1 gcl1 11.0 12.5 14.0 v vcc=15v gclamp voltage 2 gcl2 11.0 12.5 14.0 v vcc=22v vref uvlo 1 v ruvlo1 77.5 3.100v 87.5 (3.500v) 97.5 (3.900v) % when vref rise the ratio of vref pin voltage. vref uvlo 2 v ruvlo2 52.5 (2.100v) 62.5 (2.500v) 72.5 (2.900v) % when vref drop the ratio of vref pin voltage. vref uvlo hysteresis v ruvlo3 - 25 1.000v - % v ruvlo3 = v ruvlo1 - v ruvlo 2 vcc uvlo voltage 1 v uvlo1 12.50 13.50 14.50 v vcc rise vcc uvlo voltage 2 v uvlo2 6.00 7.00 8.00 v vcc drop vcc uvlo hysteresis v uvlo3 - 6.50 - v v uvlo3 = v uvlo1 - v uvlo2 vcc ovp voltage 1 v ovp1 24.0 27.0 30.0 v vcc rise vcc ovp voltage 2 v ovp2 20.0 23.0 26.0 v vcc drop vcc ovp hysteresis v ovp3 - 4.0 - v v ovp3 = v ovp1 - v ovp2 brown out detection voltage 1 v bo1 0.350 0.400 0.450 v p_bo rise brown out detection voltage 2 v bo2 - 0.200 - v p_bo drop brown out hysteresis v bo3 - 0.200 - v v bo3 = v bo1 v bo2 brown out detection delay time 1 t bo1 21.8 32.0 42.2 ms times until acdet logic change ( actimer=l) brown out detection delay time 2 t bo2 87.0 128.0 169.0 ms times until acdet logic change ( actimer=h) brown out detection delay time 3 t bo3 170 250 330 ms times until pfc and qr stop
datasheet d a t a s h e e t 4/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F electrical characteristics (unless otherwise noted ,ta=25,vh_in=320vdc,vcc=12v) parameter symbol specifications unit conditions minimum standard maximum acdet pin characteristics acdet pin on resister r acdet 50 100 200 ? actimer pin characteristics actimer pin input l level v actimel - - 0.3 v actimer pin input h level v actimeh 1.2 - - v actimer pin pull-down resistor r actimeh 165 330 500 k ? pfcon/off pin characteristics pfcon/off pin input l level v pon/offl - - 0.3 v pfc = on pfcon/off pin input h level v pon/offh 1.2 - - v pfc = off pfcon/off pin pull-down resistor r pon/offh 50 100 150 k ? pfcon/off pin timer time t pfcon/off 0.50 1.50 3.00 ms latch/autor pin characteristics latch/autor pin input l level v model - - 0.3 v latch/autor pin input h level v mode h 1.2 - - v latch/autor pin pull-down resistor r modeh 50 100 150 k ? [comp pin characteristics] comp pin detection voltage v comp 0.370 0.500 0.630 v comp pin pull-up resistor r comp 19.4 25.9 32.3 k ? external thermistor resistor r t 3.32 3.70 4.08 k ? latch release voltage vcc pin voltage v l atchoff - v uvlo2 -0.5 - v latch mask time t comp 70 150 240 us
datasheet d a t a s h e e t 5/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F electrical characteristics (unless otherwi se noted ta=25, vh_in=320vdc, vcc=12v) parameter symbol specifications unit conditions minimum standard maximum [quasi-resonant control block] [quasi-resonant dc/dc conv erter block (turn off)] qr_fb pin pull-up resistance r fb 15 20 25 k ? cs over-current detect voltage 1a v lim1a 0.950 1.000 1.050 v i zt <1.0ma cs over-current detect voltage 1b v lim1b 0.630 0.700 0.770 v i zt >1.0ma cs over-current detect voltage 1c v lim1c - 0.250 - v i zt <1.0ma cs over-current detect voltage 1d v lim1d - 0.750 - v i zt <1.0ma cs over-current detect voltage 2a v lim2a - 0.150 - v qr_fb=0.3v (i zt <1.0ma) cs switched zt current i zt 0.800 1.000 1.200 ma cs leading edge blanking time t leb - 0.250 - us turn off time t off - 0.250 - us *1 minimum on width t min - 0.500 - us t leb t off [quasi-resonant dc/dc converter block (turn on)] maximum operating frequency 1 f sw1 106 120 134 khz qr_fb=2.00v maximum operating frequency 2 f sw2 24 30 36 khz qr_fb=0.50v frequency reduction start fb voltage v fbsw1 1.15 1.250 1.350 v frequency reduction end fb voltage v fbsw2 0.35 0.50 0.65 v voltage gain av cs 1.70 2.00 2.30 v/v S v (qr_fb)/ S v qr_cs zt comparator voltage 1 v zt1 60 100 140 mv qr_zt drop zt comparator voltage 2 v zt2 300 400 500 mv qr_zt rise zt trigger timeout period t ztout - 15 - us count from final zt trigger [quasi-resonant dc/dc converte r protection functions] soft start time1 t ss1 0.60 1.00 1.40 ms soft start time2 t ss2 2.60 4.00 5.40 ms fb olp voltage 1a v folp1a 2.5 2.8 3.1 v operate qr_fb rise fb olp voltage 1b v folp1b - 2.6 - v operate qr_fb drop fb olp voltage 2a v folp2a 3.3 3.6 3.9 v switched latch / auto recovery rise fb olp voltage 2b v folp2b - 3.4 - v switched latch / auto recovery drop fb olp mode switched external connected resistor r folp2 90 100 110 k ? qr_fb pin external resistance value (during latch mode) fb olp timer t folp 44 64 84 ms zt ovp voltage v ztl 3.2 3.5 3.8 v [qr_out pin] qr_out pin pmos on resistor r pout 5 15 30 ? qr_out pin nmos on resistor r nout 2 5 10 ? [qr_sel pin] qr_sel pin ron r mask - 150 - ? *1 pulse is applied to qr_cs pin *2 pulse is applied to qr_zt pin
datasheet d a t a s h e e t 6/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F electrical characteristics (unless otherwi se noted ta=25, vh_in=320vdc, vcc=12v) parameter symbol specifications unit conditions minimum standard maximum [power factor correction pfc controller block] [power factor correction (pfc) gm amplifier block] p_vs pin pull-up current i p_vs - 0.50 - ua gm amplifier normal voltage v vsamp 2.460 2.500 2.540 v gm amplifier trans-conductance v vsgm 30.8 44.0 57.2 us maximum gm amplifier source current i vsamp1 15 25 35 ua p_vs=1.0v maximum gm amplifier sink current i vsamp2 24 40 56 ua p_vs=3.5v [power factor correction (pfc) input voltage monitor block] p_bo input voltage range v p_boin 0.000 - 1.800 v p_bo pin leak current i boleak -1.00 0.00 1.00 ua [power factor correction (pfc) input voltage peak detect block] p_bopk max charge current i bopkchg 36 72 144 ua p_bopk max discharge current i bopkdis 0.1 0.2 0.4 ua [power factor correction (pfc) multiplier block] multiplier constant k multi 0.37 0.54 0.71 p_vseo stop voltage 1 v vseo1 181 226 271 mv bopk=0.56v p_vseo stop voltage 2 v vseo2 88 128 168 mv bopk=1.30v [power factor correction (pfc) oscillation frequency block] pfc oscillation frequency f psw1 60 65 70 khz minimum pulse width t min - 500 - ns maximum duty d max 90.0 94.0 98.0 % [power factor correction (pfc) driver block] p_out pin pmos on resistor rp pout 5 15 30 ? p_out pin nmos on resistor rp nout 2 5 10 ?
datasheet d a t a s h e e t 7/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F e lectrical characteristics (unless otherwi se noted ta=25, vh_in=320vdc, vcc=12v) parameter symbol specifications unit conditions minimum standard maximum [power factor correction (pfc) controller block ] [power factor correction (pfc) protection function block ] leading edge blanking time t pleb - 250 - ns p_cs over current limit voltage 1 v pcs1 0.93 1.16 1.40 v p_bopk=0.56v p_cs over current limit voltage 2 v pcs2 0.48 0.60 0.72 v p_bopk=1.30v p_vs short protection voltage v p_short 0.200 (-92%) 0.300 -88% 0.400 (-84%) v figure of () is comparison with p_vs standard voltage 2.5v qr power-limit p_vs voltage1 v pfcon 1.800 (-28%) 2.000 (-20%) 2.200 (-12%) v figure of () is the ratio of p_vs standard voltage 2.5v qr power limit p_vs voltage2 v pfcoff 1.100 (-56%) 1.250 (-50%) 1.400 (-44%) v figure of () is the ratio of p_vs standard voltage 2.5v p_vs qr power limit hysteresis v pfchy s - 0.750 (30%) - v figure of () is the ratio of p_vs standard voltage 2.5v p_vs gain rise voltage v pgup 2.050 (-18%) 2. 250 -10% 2.450 (-2%) v figure of () is the ratio of p_vs standard voltage 2.5v p_vs gain fall voltage v povp1 - 2.625 +5% - v figure of () is the ratio of p_vs standard voltage 2.5v p_vs over voltage protection voltage v povp2 - 2.725 +9% - v figure of () is the ratio of p_vs standard voltage 2.5v p_vs over voltage protection timer t povp2 16 32 48 ms the time to detect p_vs over voltage protection
datasheet d a t a s h e e t 8/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F pin configure table 1. i/o pin functions no pin i/o function esd protection system vcc gnd 1 p_bo i input ac voltage monitor pin 2 p_vseo i/o pfc gm amplifier output pin 3 p_vs i pfc output voltage monitor pin 4 p_bopk o connected capacitor to the pin 5 p_cs i pfc coil current monitor pin 6 pfcon/off i pfc on/off control input pin 7 comp i external latch stop pin 8 acdet o input ac voltage state communication pin 9 actimer i brown out detection time setting input pin 10 gnd i/o gnd - 11 p_out o pfc output drive pin 12 gclamp i/o gate h level clamp pin 13 vcc i/o power supply pin - 14 qr_out o quasi-resonant output drive pin 15 qr_sel o quasi-resonant mask pin - 16 gnd i/o gnd - 17 qr_cs i quasi-resonant over current detected pin 18 qr_fb i quasi-resonant feedback detected pin 19 qr_zt i quasi-resonant zero cross detected pin - 20 latch/autor i protection mode switched input pin 21 vref o internal power supply pin 22 - - - - - 23 - - - - - 24 vh_in i ac input voltage applied pin -
datasheet d a t a s h e e t 9/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F i/o equivalent circuit diagram figure 2. i/o equivale nt circuit diagram
datasheet d a t a s h e e t 10/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F block diagram osc figure 3. block diagram
datasheet d a t a s h e e t 11/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F leading edge blanking (250ns) s q r internal supply and min on width pre driver 15 5 + - + - - + - + and and + - internal clk 65khz + - 1m - + - + or max duty 94% + - + - + - + - s q r and pre driver pout nout 15 5 1m stop leading edge blanking (250ns) current sense (v-v change) normal : 1.0 soft start ss1ms ss4ms + - + timer (64ms) + - 100mv /400mv 1 shot 7v zt blanking out(h->l) 0.60us nout timeout ( 15 usec ) and fb/2 + - - 1.00v + - max blanking frequency (120khz) 1.25v 0.50v osc 200k or 20k + - + - or and 3.50v 200k + - burst_oh fbolp_oh or + - 0.5v *k1 *k2 *k3 - + ramp + - and 100k + - 1/v bopk gateclamp figure 3-2. block diagram
datasheet d a t a s h e e t 12/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F explanation of each block (1) starter block (24pin) BM1051F built in the starter circuit that withstands 650v. for that, application used the ic is enabled faster start time and low standby power. after start-up, consumption power is idling current i start3 typ=10ua only. reference of start-up time is shown in figure 4. it can start-up less than 0.1sec when c vcc =10uf. figure 4. start circuit block diagram 0.0 ? 0.1 ? 0.2 ? 0.3 ? 0.4 ? 0.5 ? 0.6 ? 0.7 ? 0.8 ? 0.9 ? 1.0 ? 0 5 10 15 20 25 30 35 40 45 50 start ? time[sec] cvcc ? [uf] figure 5. start-up current vs vcc voltage figure 6. start time vs c vcc (reference values *start current flows from vh_in pin to vcc pin. ex) when v ac =100v; consumption power of start-up circuit only. pvh 100v* 2*10ua=1.41mw ex) when v ac =240v; consumption power of start-up circuit only. pvh 240v* 2*10ua=3.38mw
datasheet d a t a s h e e t 13/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (2) start sequence the start sequence of ic operates dc/dc part, next pfc part (see the figure 7). a : input voltage vh is applied. b : charge current flows from vh_in pin to the v cc pin capacitor. then vcc pin voltage rises. c : monitor the ac voltage by p_bo pin. and confirm normal state by releasing brown out. d :when v uvlo1 typ=13.5v < vcc pin, release the inside uvlo and on the inside regulator vref. e : when v ruvlo1 typ=87.5% < vref pin, release the inside vrefuvlo. f : if the ?e? state continues const ant period, dc/dc part starts becaus e it recognizes normal state. when the switching starts, vout voltage rises. when the dc/dc start-up, please set external part s to be regulated output voltage within the t folp period (64ms .typ ). [qr start-up operation] g: this ic adjusts over current limiter of dc/dc by operat ion of soft start 1 against over voltage and current rising. that term continues t ss1 (typ=1ms). h: this ic adjusts over current limiter of dc/dc by oper ation of soft start 2 against over voltage and current rising. soft start 2 operation continues power limiter operation until p_vs pin voltage > v pfcon (2.00v typ) and t ss2 typ=4ms . this ic operates the state that maxi mum power of qr is 50% at this state. i: if secondary voltage is setting value, qr_fb pin voltage is c onstant value corresponded load by current from photo coupler. at normal state, qr_fb voltage is qr_fb datasheet d a t a s h e e t 14/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F about figure7, condition is pfcon/off=l. start up operation is shown at figure8, 9 by the state shift figure. figure 8 is latch/autor=l (auto return operation ), and figure 9 is latch/autor=h (latch operation) (note) when the latch mode is used, it is necessary to apply 3.5v~4.5v to vref terminal from the outside. ( ? c) figure 8. diagram of state machine (latch/autor=l)
datasheet d a t a s h e e t 15/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F figure 9. diagram of state machine (latch/autor=h)
datasheet d a t a s h e e t 16/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (3) vcc protection function and vref pin function (3-1) vcc pin protection function(13pin) BM1051F built in vcc low voltage prot ection function of vccuvlo (under voltage lock out) and over voltage protection function of vcc ovp (over voltage protection). this function monitors vcc pin and prevent vcc pin fr om destroying switching mosfet at abnormal voltage. vccuvlo is auto recovery comparator that has voltage hyst eresis. vccovp operates as la tch mode comparator in the latch/autor=h and as auto return co mparator in the latch/autor=l. vccv uvlo1 ,dc/dc operation start c:vccv uvlo1 ,dc/dc operation start e:vcc voltage decreases until starting dc/dc switching f:vcc rise f:when vcc>vovp1,dc/dc operation is stopped. switching is stopped by internal latch signal. g:then dc/dc operation is stopped, power supply is lost from auxiliary, vcc voltage downs. h:vccvuvlo1, this ic dose not operate dc/dc for latch operation. vcc voltage drops because of dropping of ic's consumption current. j:same of h k:same of i l:same of j m:vh is open(the state is outlet out).vcc drops. n:vcc datasheet d a t a s h e e t 17/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (3-2) vref pin function(21pin) vref pin is internal regulator output pin. the use of vref pin is ic's internal supply and connection of latch/autor pin changing. this pin needs an external capacitance, please use the capacitance following table. (note) when the latch mode is used, it is necessary to apply 3.5v~4.5v to vref terminal from the outside. ( ? c) table 2. vref pin output capacitor capacitance parameter symbol specification unit conditions minimum standard maximum vref output capacitor c ref 0.68 1.00 2.20 uf (3-3) vref pin protection function(21pin) vref pin built in low voltage protection function vref uvlo (under voltage protection). this ic prevents from error operating at the time, vref starts up and vref is low, by this function. figure11. vref uvlo function
datasheet d a t a s h e e t 18/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F 3-4 blown out function(1 pin) BM1051F built in blown out function. this function is that this ic stops dcdc operat ing at the time when input ac voltage is low. show the example figure12. this ic divides in put voltage by the resistance, and input p_bo pin. this ic detects from circuit normal state, and st arts dc/dc operation the time when p_bo pin exceeds v bo1( 0.4v typ). acdet=l after t bo1 (typ.32ms) or t bo2 (typ.128ms) from p_bo pin drops from v bo2 (0.2v typ). moreover, if t bo3 (typ.250ms) passes from p_bo v bo1 (typ.0.4v) acdet=l->h b: after 150us from a dc/dc part starts up. c:qr_fbh. e: p_bol. it is possible to set t bo1 and t bo at actimer pin g:after t bo2 ( typ.250ms) from e, dc/dc part and pfc part are off bo2 bo1 bo2 ac r + r r v = p_bo f1 ac v >> v bo2 bo1 bo2 f1 ac r + r r v v 2 = bo _ p
datasheet d a t a s h e e t 19/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (4)controller part (4-1)acdet pin (8pin) acdet pin is nmos open drain output. it monitors ac vo ltage, and is used for controlling secondary micon. show the using example figure14, 15. please set vin is h voltage of micon. acdet=l abnormal state p_bo < 0.2v acdet=h normal state figure14. using example of acdet pin figure15. explanation of acdet pin
datasheet d a t a s h e e t 20/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F next, show an easy sequence. figure16. at applied ac input voltage p_bo voltage<0.4v because p_bo < 0.4v, dc/dc part is off. vcc voltage>13.5v figure17. at applied ac input voltage p_bo voltage >0.4v
datasheet d a t a s h e e t 21/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F a detect p_bo 0.4v, quasi resonance starts operation after 150 s b pfc start up c pfc output stabilized *about pfc operation, by the micon, is able to be controlled using pfcon/off pin. figure18. at ac power supply off a detect p_bo 0.2v, internal acdet timer operates. at this time, output of pwc downs. b after 32ms actimer=l from the point a, acdet pin voltage is h->l, send to the -controller abnormal signals. c after 250ms from the point of a,pf c and quasi resonant are stopped figure19. at ac power supply th e case of operation moment stop the case of ac voltage is off suddenly, constant area is masked. the time of constant area of masking is depends on actimer pin. the case of actimer pin=l, mask time=32ms the case of actimer pin=h, mask time=128ms. the moment of ac voltage momentary power interruption, bec ause pfc output voltage is down by corresponding to load, please watch out.
datasheet d a t a s h e e t 22/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (4-3) pfcon/off pin pfcon/off pin is nmos gate input pin. refer to following the functions. an internal timer is integrated fo r noise protection on pfcon/off pin. after t pfcon/off (typ.1ms) from pfcon/off h l, pfcon/off l operation starts. at pfcon/off l h, internal timer is not integrated. function1 pfc circuit operation is off control. in order to reduce standby power, ic cont rols pfc part operation at pfcon/off pin. function2 qr_sel pin is hi-z l refer to example of using at figure 20. pfcon/off=l dc/dc part on pfc part on qr_sel hi-z pfcon/off=h dc/dc part on pfc part off qr_sel=l figure20. using example of pfcon/off pin pc plimary side secondary side pfc on/off vref ucom controlled by nch open-drain logic
datasheet d a t a s h e e t 23/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (4-4) latch/autor pin latch/autor pin is nmos gate input pin. refer to example of using at figure21. operation setting of protection function is shown at table3. latch/autor=l auto recovery latch/autor=h latch (note) when the latch mode is used, it is necessary to apply 3.5v~4.5v to vref terminal from the outside. ( ? c) figure21. using example of latch/autor pin table 3. list of protection function oper ation setting by latch/autor pin *comparator level of protection function is shown by typ value. detection method operation at detection release mothod operaetion at detection detection method operation at detection release mothod operaetion at detection vrefuvlo vref pin low voltage protection function vref<2.5v vref falling pfc part, dc/dc part operation stops vref>3.5v vrefrising pfc partdc/dc part enable to operate vccuvlo vcc pin low voltage protection function vcc<7.0v vcc falling pfc part, dc/dc part operation stops vcc>13.5v vcc rising pfc partdc/dc part enable to operate vccovp vcc pin over voltage protection function vcc>27v state continues between 150usvcc rising pfc part, dc/dc part operation stops vcc<23.0v vccfalling pfc partdc/dc part enable to operate vcc>27v vcc rising pfc part, dc/dc part latch operation stops vcc<6.5v vcc falling pfc part, dc/dcpart enable to operate blown out input ac voltage low voltage protection function p_bo0.2v state continues between 250ms pfc part, dc/dc part operation stops p_bo>0.4v p_borising pfc partdc/dc part enable to operate qr_fb_olp1 qr_fb pin over current protection function qr_fb>2.8v state continues between 250msqr_fb dc/dc part operation stops qr_fb<2.6v qr_fb falling normal operation qr_fb_olp2 qr_fb pin over current protection function qr_fb>3.6v qr_fb rising dc/dc part operation stops qr_fb<3.4v qr_fb falling normal operation qr_zt ovp qr_zt pin over voltage protection function qr_zt>3.5v state continues between 150usqr_zt dc/dc part operation stops qr_zt<3.5v qr_zt falling normal operation qr_zt>3.5v state continues between 150usqr_zt pfc part, dc/dc part latch operation stops vcc<6.5v vcc falling normal operation p_vs short protection p_vs pin short protection function p_vs<0.30v p_vs falling pfc part operation stops p_vs>0.30v p_vs rising normal operation p_vs gain increasing p_vs pin low voltage gain increasing function p_vs<2.25v p_vs falling gm amp gain increasing p_vs>2.25v p_vs rising normal operation p_vsovp1 p_vs pin over voltage protection function1 p_vs>2.625v p_vs rising gm amp gain falling p_vs<2.625v p_vs falling normal operation p_vsovp2 p_vs pin over voltage protection function2 p_vs>2.725v p_vs rising pfc part stops p_vs<2.600v p_vs falling normal operation p_vs>2.725v p_vs rising pfc part, dc/dc part latch operation stops vcc<6.5v vcc?r normal operation comp function comp pin protection function comp<0.5v state continues between 150uscomp pfc part, dc/dc part operation stops comp>0.50v comp rising normal operation comp<0.5v state continues between 150uscomp pfc part, dc/dc part latch operation stops vcc<6.5v vcc falling normal operation same as latch/autor=gnd item contents latch/autor=gnd latch/autor same as latch/autor=gnd same as latch/autor=gnd same as latch/autor=gnd same as latch/autor=gnd same as latch/autor=gnd same as latch/autor=gnd same as latch/autor=gnd
datasheet d a t a s h e e t 24/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (4-5) actimer pin actimer pin is nmos gate input pin. show example of using figure 22, 23 set the detect timer of ac voltage drop. please refer to acdet pin page figure22. using example of actimer pin actimer=gnd : 32ms timer actimer=vref :128ms timer figure23. ac power at the case momentary power interruption off
datasheet d a t a s h e e t 25/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (4-6) comp pin external stop control function comp pin is stop control pin. w hen comp pin voltage drops from v comp (0.5v. typ), comp pin stops pfc and dc/dc part operation. this ic built in t comp (150us .typ) until stopping switchin g, prevent from stopping by noise. comp pin is in pull-up resistor r comp (25.9k ? . typ), when comp pin is the state of pull-down with lower resistance than r t (3.70k ? .typ), comp pin detects abnormal. show applic ation examples at the figure24, 25, and 26. temperature protection by ntc thermister by putting a thermister at the comp pin, it is possible to stop latch on temperature rising. the case of this application, please design thermister resister is r t (3.70k ? .typ) on temperature detection. figure24 and 25 is application circuit that latch on ta=110 (note) when the latch mode is used, it is necessary to apply 3.5v~4.5v to vref terminal from the outside. ( ? c) figure 24. temperature protection application figure 25. temperature?thermistor resistor characteristic secondary over- voltage protection this ic can detect secondary over-voltage by putting photo coupler to comp pin. figure26.output over voltage protection application table 4. changes of comp function o peration by latch/autor pin 0.0 ? 2.0 ? 4.0 ? 6.0 ? 8.0 ? 10.0 ? 12.0 ? 14.0 ? 16.0 ? 18.0 ? 20.0 ? 0 20 40 60 80 100 120 140 160 180 200 resister ? value r ? [k ] temparature t[ ] r t t(typ3.7k ) detect detection method operation at detection release mothod operaetion at detection detection method operation at detection release mothod operaetion at detection comp function comp pin protection function comp<0.5v state continues between 150uscomp falling pfc part, dc/dc part operation stops comp>0.50v comp rising normal operation comp<0.5v state continues between 150uscomp falling pfc part, dc/dc part latch operation stops p_vcc<6.5v p_vcc falling normal operation item contents latch/autor=gnd latch/autor=vref
datasheet d a t a s h e e t 26/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (5)quasi-resonant dc/dc converter function part of quasi-resonant dc/dc uses pfm(p ulse frequency modulation)mode control. the qr_fb pin, qr_zt pin and qr_cs pin are moni tored to provide a system optimized for dc/dc." the switching mosfet on width (turn off) is controlled via the qr_fb pin and qr _cs pin, and the off width(turn on). show following detail explanation. (refer to figure27). figure27. diagram of quasi-reso nant dc/dc operation
datasheet d a t a s h e e t 27/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (5-1) determination of on width (turn off) on width is controlled via the qr_fb pin and qr_cs pin. the qr_fb pin voltage is compared with the ic internal voltage v lim1 (1.0v typ) and, as is shown in figure28. and the comparator level changes linearly. the qr_cs pin is also used for the pulse-by-pulse over current limiter circuit. by changing voltage at the qr_fb pin, dc/dc resu lts in changes of the maximum blanking frequency and over-current limiter level. ? mode1: burst operation ? mode2: frequency reduction operation(reduces maximum frequency) ? mode3: maximum frequency operation( operates at maximum frequency) ? mode4: overload operation(pulse operatio n is stopped when overload is detected) (a) i zt <1.0ma (b) i zt >1.0ma figure 28. relation of qr_fb pin, over current limiter and maximum frequency the over current limiter level is adj usted, when the input voltage is change d, operate the soft start function. in this case, the vlim1 and vlim2 values are as listed below." table 5. current protection vo ltage of quasi-resonant dc/dc soft start ac=100v ac=230v vlim1 vlim2 vlim1 vlim2 start 1ms 0.250v ( 25.0%) 0.039v ( 3.9% ) 0.176v ( 17.6%) 0.026v ( 2.6%) 1ms pfc start &4ms 0.750v ( 75.0%) 0.113v ( 11.3%) 0.525v ( 52.5%) 0.079v ( 7.9%) pfc start & 4ms 1.000v (100.0%) 0.150v ( 15.0%) 0.700v ( 70.0%) 0.105v ( 10.5%) *( ) is ac=100v, these show relative value of compare with v lim1 1.0vtyp of normal operation. this table is separated ac100v and ac230v for the functi on of qr_cs current changing function that is shown 4-3 .
datasheet d a t a s h e e t 28/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (5-2)leb(leading edge blanking)function when the switching mosfet is turned on, surge current occu rs at each capacitor charge /discharge or drive current. for that, qr_cs voltage rise temporarily, over current limiter may be detected errors. to prevent detection errors blanking time is built in to mask t leb (typ=250ns). this blanking function enables a reduction of cs pin filtering. (5-3) cs over current protection function when the ac input voltage (vhin) is high, the on time is reduced and the operati ng frequency increases. as a result, the maximum rated power is increased for a constant over current limiter level. as a counterm easure, dc/dc is switched over current detected level. ac input voltage detection method is that monitoring qr_zt current. when mosfet is turn on, the auxiliary voltage (v a ) is the minus voltage that depends on input voltage vh . qr_zt pin is clamped about 0v internal ic. following is the formula for that case. refer to the block figure29. see the graph figure30 and 31. izt v a v zt /r z 1 P va/r z 1 vh * n a /n p /r z 1 r zt1 v a /i zt for that, vh voltage is set by the resistance value of r zt1 . then, qr_zt bottom detection voltage is decided, please set timing by c zt. figure 29. diagram of cs switching current nout + - + leading edge blanking timer (250ms) fbolp_oh + - 100mv /400mv 1 shot 7v and zt blanking out(h->l) 0.60us nout timeout ( 15 usec ) and and pre driver pout fb/2 + - - 1.00v current sense (v-v change) normal : 1.0 + - fbolp_oh max blanking frequency (120khz) 1.25v 0.30v + - 200k 200k soft start or or 20k + - + - ss1ms ss4ms + - s q r nout
datasheet d a t a s h e e t 29/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F figure 30. qr_cs switching qr_fb voltage vs qr_cs voltage figure 31. qr_cs switching i zt current vs qr_cs voltage ex) setting method operate changing ac100v and ac220v ac100v 141v42v 30 margin ac220v 308v62v 20 margin the case of above, between 182v 246v, operates changing of cs current => operate vh 214vh n p =100, n a =15 v a =v in *n a /n p = 214v*15/100 *(-1) = -32.1v rzc = v a / i zt = -32.1v/-1ma = 32.1k ? by the above explanation, r zt =32k ? figure 32. example of over current limiter of cs switching
datasheet d a t a s h e e t 30/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (5-4) determination of off width(turn on) off width is controlled at the qr_zt pin. when switching is off, the power stored in the coil is supplied to the secondary-side output capacitor. when this power supply ends there is no more current flowing to secondary side, so the switching mos drain pin voltage drops. consequently, the voltage on the auxiliary coil side also drops. a voltage that was resistance-divided from the qr_zt pin by r zt1 and r at2 is applied. when this voltage level drops to vzt1(100mv typ) or below, switching is turned on the qr_zt co mparator. since bottom status is detected at the qr_zt pin, time constants are generated using c zt, r zt1 , and r zt2. additionally, a qr_zt trigger mask function (described in section 5-5) and a qr_zt time out function (described in section 5-6) are built in. (5-5)qr_zt trigger mask function the qr_zt trigger mask function is shown below figure33. when switching is set on -> off, super posit ion of noise may occur at the qr_zt pin. at such times, the qr_zt comparator is masked for the t ztmask time to prevent qr_zt comparator operation errors. figure 33. zt trigger mask function a: qr_out off=>on b: qr_out on=>off c: because of generation of qr_zt pin noise, t ztmask doesn?t operate the qr_zt comparator. d: same as a e: same as b f: same as c g: same as a
datasheet d a t a s h e e t 31/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (5-6)zt time out function(figeure34) after the zt comparator is detected, this function forcibly tu rns switching on if the followi ng is not detected, even when t ztout (15us typ) has elapsed. if, the secondary output voltage is low, the auxiliary coil voltage va is reduced, and the qr_zt pin voltage drops below v zt1 (100mvtyp). in such cases, this function turns switching on forcibly. as for t ztout , since 15 us (typ) = 66.7khz, when the maximum frequency is in frequency reduction mode, the qr_zt timeout time depends on the frequency reduction mode figure 34. zt time out function a: qr_zt v zt1 dc/dc is on. count maximum frequency at this point. b: dc/dc on=>off c: because noise is generated at qr_zt pin, t ztmask doesn?t operate qr_zt comparator. d: dc/dc off=>on e: same as b f: same as c g: count maximum frequency h: because 1 cycle >t ztout , forcibly be dc/dc off=>on (5-7)soft start operations normally, when the power supply is turned on, a large current flows to the ac/dc power supply. the BM1051F builds-in a soft start function to prevent large changes in the output voltage and output current during startup. this function is reset when the vcc pin voltage is at v uvlo2 (7.0v typ) or below, soft start is performed again at the next ac power-on. during a soft start, the following post-startup operations are performed. (see turn off described in section 5-1) start to 1ms -> set to 25% when cs limiter value is normal 1ms pfc normal status -> set to 75% when cs limiter value is normal
datasheet d a t a s h e e t 32/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (5-8)overload protection function/overload protection mode switching the overload protection function monitors the overload status of the secondary output current at t he fb pin, and fixes the out pin at low level when overlo ad status is detected. during overload status, current no longer flows to the photocoupler, so the qr_fb pin voltage rises. when this status continues for the t folp time (64ms typ), it is considered an over lo ad, and the out pin is fixed at low level. once the qr_fb pin voltage exceeds v folp1a (2.8v typ), if it drops to lower than v folp1b (2.6v typ) during the t folp time (64ms typ), the overload protection timer is reset. at startup, the qr_fb voltage is pulled up to the internal voltage by pull-up resistor, and operation starts once the voltage reaches v folp1a (2.8v typ) or above. therefore, the des ign must set the qr_eb voltage at or below the v folp1b (2.6v typ) voltage within the t folp (64ms typ) time. in other words, the secondary output voltage start time must be set to within t folp (64ms typ) after ic startup. when an overload is detected, either aut o recovery mode or latch mode can be selected for the BM1051F.when pull-down resistance r folp (100k ? typ)is attached to qr_fb pin, latch mode is set. do not attach any r folp value other than 100k ? typ, since that would prevent latching due to the ic7s internal resistance ratio. to release latching after selecting latch m ode, first unplug the power supply, and then set vcc2.8v state continues 250ms qr_fb rising dc/dc part operation stop qr_fb<2.6v qr_fb falling normal operation qr_fb_olp2 qr_fb pin over current protection function qr_fb>3.6v qr_fb rising dc/dc part operation stop qr_fb<3.4v qr_fb falling normal operation qr_zt ovp qr_zt ipn over voltage protection function qr_zt>3.5v state continue 150us qr_qr_ztrising dc/dc part operation stop qr_zt<3.5v qr_zt falling normal operation qr_zt>3.5v state continues 150us qr_zt rising dc/dc part latch operation stop vcc<6.5v vcc falling normal operation item contents latch/autor=gnd latch/autor=vref same as latch/autor=gnd same as latch/autor=gnd
datasheet d a t a s h e e t 33/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (6)power factor correction circuit (pfc: power factor correction)part power factor correction circuit is peak current control method of fixed frequency. it is possible to supply proper system as pfc by monitoring p_vs pin, p_cs pin, and p_bo. it is possible to control the mosfet on width by monitoring output voltage at p_vs pin, ac input voltage at p_bo pin, and mosfet current at p_cs pin. the switching frequency is f psw1 (typ=65kh). following is detail explanation of pfc (reference figure36). figure 36. diagram of pfc block
datasheet d a t a s h e e t 34/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (6-1) gm amp p_vs pin monitors a divide voltage between resistors of pfc out put voltage. p_vs pin is piled up ripple voltage of ac frequency (50khz/60khz). the gmamp filters this ripple voltage and controls the voltage level of p_vseo, by responding to error of p_vs pin voltage p_vs pin voltage and internal reference voltage v vsam p (typ 2.5v). please set cut-off frequency of filter at p_vseo pin showed in figure 37, to about 5~10hz. gm constant is designed 44[ua/v]. figure 37. diagram of gmamp (6-2)monitor of input voltage pfc is monitored ac input voltage at the p_bo pin. because the range of input voltage at p_bo pin is 0~1.8v, please select r bo1 and r bo2 to set p_bo voltage in the range. refer to block figure at figure38. figure 38. diagram of input voltage monitor
datasheet d a t a s h e e t 35/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (6-3)maximum power limiting function pfc maximum power is also larger as input voltage is larger. to compensate this maximum power, pfc built-in maximum power limiting. maximum power is in proportion to the square of output of multip lier v_mult, so it is possible to correct that maximum power depends on input voltage by dividing p_bo voltage by p_bopk voltage which is peak voltage of p_bo pin. figure 39. diagram of maximum power restriction function (6-4)multiplier a multiplier is calculated gmamp output voltage a nd p_bo pin voltage, and p_bopk pin voltage. following is formula of multiplier output. v mult : multiplier output voltage k: multiplier constant (6-5) switching frequency switching frequency is averaged typ.65khz. max duty is d max (typ 94%), always the period has off width. figure 40. frequency function p_bo p_vs p_ vseo - + 2.500v 0.01uf p_ vs o i i *k1 *k2 *k3 1/v vm = k1* v(p_bo) * k2* v(p_vs)/{k3*v(p_bopk)}*k4 Pk * v(p_bo) * v(p_vs )/v(p_bopk) io p_bopk peak hold ?? ?? v(p_bopk) v(p_vseo)/ v(p_bo) k v(p_bopk) v(p_vseo) k v(p_bo) 1 3 2 ? ? ? ? ? ? ? ? k k v mult
datasheet d a t a s h e e t 36/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F ( 6-6)leb(leading edge blanking) function when the switching mosfet is turned on, surge current occu rs at each capacitor charge /discharge or drive current. for that, p_cs voltage rise temporarily, over current limiter may be detected errors. to prevent detection errors blank ing time is built in during t pleb (typ=250ns) from p_out pin changing l h.. this blanking function enables a reduction of p_cs pin noise filter. (6-7) over current protection function p_cs pin built in over current protection function for mosfet . this function operates in pulse by pulse, and detects over current. over current detection voltage is changed by p_ bopk pin voltage. over current detection voltage is v pcs1 (typ = 1.16v) at p_bopk voltage =0.56v, v pcs2 (typ = 0.60v) at p_bopk voltage = 1.30v. show figure41 changing of over current detection voltage by p_bopk pin voltage. over-current detection value i pcs is decided i pcs =v pcs /r s by external resistance r s at figure42. figure 41. over-current detection voltage - p_bopk voltage peculiarity figure 42. diagram of over current protection (6-8)p_vs short protection function pfc built in short protection function at p_vs. switching is stopped at p_vs voltage datasheet d a t a s h e e t 37/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (6-9) gain increase function in p_vs low voltage dropping output voltage by suddenly load change, because pfc voltage response is slow, output voltage is low for a long time. therefore, pfc is speed up voltage control l oop gain when p_vs pin voltage is low up to v pgup (typ = 2.25v)(output voltage - 10%). in the operation, on-duty at p_out pin increases, pfc prevents from output voltage dropping for a long time. this operation is stopped when p_vs pin voltage is upper than v gup (typ=2.25v). (6-10)p_vs first over voltage protection function in case of output voltage is rise by starting up or output load suddenly change, because pfc voltage response is slow, output voltage is high for a long time. therefore, pfc is speed up voltage control loop gain when p_vs pin voltage is rise v p_ovp1 (typ=2.625). in this operation, on-duty at p_out pin decreas e, pfc prevents from output voltage rising for a long time. this operation is stopped when p_vs pin voltage is lower than v p_ovp1 (typ=2.625v). (6-11)p_vs second over voltage protection function pfc built in second over voltage protection, for the case that p_vs voltage exceeds over first over voltage protection voltage v p_ovp1 . it is possible to switch latch protection (latch/autor= h) or auto recovery (latch/autor=l) by latch/autor pin. in case of latch operation, p_vs pin voltage exceeds v p_ovp 2 (typ=2.725v)(output voltage pulse9%) during t p_ovp2a (typ=32ms), pfc switching is stopped. in case of auto recovery, p_vs pin voltage is exceeded v p_ovp2 (typ=2.725v), switching is stopped instantly. when p_vs pin voltage decrease lower than v p_ovp2 (typ=2.725v), switching operation is re-start. refer to figure44. (note) when the latch mode is used, it is necessary to apply 3.5v~4.5v to vref terminal from the outside. ( ? c) figure 44. vs second over voltage protection (at auto recovery mode) figure 45. operation of p_vs second over voltage protection (at latch mode) switching is stopped by second over voltage protection in the case that the p_vs pin loop of output voltage is open loop.
datasheet d a t a s h e e t 38/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F (6-12)pfc burst operation pfc built-in burst operation for preventing pf c output voltage from rising at light load. this function is that pfc monitors p_vseo pi n at light load, switched burst operation or not. burst operation voltage depends on p_bopk voltage. in case of p_bopk voltage = 0.56v, burst functi on operates when p_vseo voltage is lower than vseo=v p_burst (0.266v typ). in case of p_bopk voltage = 1.30v, burst function operates when p_vseo voltage is lower than vseo=v p_burst1 (0.128v typ) refer to the change of burst voltage for p_bopk voltage figure46. figure 46. diagram of p_vseo burst voltage by p_bopk voltage (6-13) operation mode of pfc block protection show operation mode every prot ection function at table7. (note) when the latch mode is used, it is necessary to apply 3.5v~4.5v to vref terminal from the outside. ( ? c) table 7. protection circuit operation mode of pfc detection method operation at detection release mothod operaetion at detection detection method operation at detection release mothod operaetion at detection p_vs short protection p_vs pin short protection function p_vs<0.30v p_vs falling pfcpart operation stop p_vs>0.30v p_vs rising normal operation p_vs gain increasing p_vs pin low voltage gain increasing function p_vs<2.25v p_vs falling gmamp gain increase p_vs>2.25v p_vsrising normal operation p_vsovp1 p_vs pin over voltage protection function1 p_vs>2.625v p_vs rising gm ampgain decrease p_vs<2.625v p_vs falling normal operation p_vsovp2 p_vs pin over voltage protection function2 p_vs>2.725v p_vs rising pfc part operation stop p_vs<2.725v p_vs falling normal operation p_vs>2.725v p_vs rising pfc part, dc/dc part latch operation stops vcc<6.5v vcc falling normal operation same as latch/autor=gnd same as latch/autor=gnd same as latch/autor=gnd item contents latch/autor=gnd latch/autor=vref
datasheet d a t a s h e e t 39/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F basic characteristics (this data is for reference only and is not guaranteed.) 0.7 0.9 1.1 1.3 1.5 1.7 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? circuit ? current ? (on) ? 1 ?? [ma ] ? ta ? [ ] 0.7 0.8 0.9 1.0 1.1 1.2 1.3 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? circuit ? current ? (on) ? 2 ?? [ma ] ? ta ? [ ] 0.8 1.2 1.6 2.0 2.4 2.8 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? circuit ? current ? (on)3 ? [ma ] ? ta ? [ ] fig-47-1 circuit current (on) 1 fig-47-2 circuit current (on) 2 fig-47-3 circuit current (on) 3 0.1 0.3 0.5 0.7 0.9 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? start ? current ? 1 ? [ma ] ? ta ? [ ] 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? start ? current ? 2 ? [ma ] ? ta ? [ ] 5.0 7.0 9.0 11.0 13.0 15.0 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? off ? current ? [ua ] ? ta ? [ ] fig-47-4 start current 1 fig-47-5 start current 2 fig-47-6 off current 0.4 0.6 0.8 1.0 1.2 1.4 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? vh ? voltage ? switched ? start ? current ? [v] ? ta ? [ ] 3.5 ? 3.6 ? 3.7 ? 3.8 ? 3.9 ? 4.0 ? 4.1 ? 4.2 ? 4.3 ? 4.4 ? 4.5 ? \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? vref ? voltage[v] ta ? [ ] 11.0 ? 11.5 ? 12.0 ? 12.5 ? 13.0 ? 13.5 ? 14.0 ? \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? gclamp ? voltage1[v] ta ? [ ] fig-47-7 vh voltage switched start current fig-47-8 vref output voltage fig-47-9 gclamp voltage 1 12.5 13.0 13.5 14.0 14.5 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? vcc ? uvlo ? voltage ? 1 ? v] ? ta ? [ ] 5.5 6.0 6.5 7.0 7.5 8.0 8.5 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? vcc ? uvlo ? voltage ? 2 ? [v] ? ta ? [ ] 24.0 25.0 26.0 27.0 28.0 29.0 30.0 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? vcc ? ovp ? voltage ? 1 ? [v] ? ta ? [ ] fig-47-10 vcc uvlo voltage 1 fig-47-11 vcc uvlo voltage 2 fig-47-12 vcc ovp voltage 1 20.0 21.0 22.0 23.0 24.0 25.0 26.0 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? vcc ? ovp ? voltage ? 2 ? [v] ? ta ? [ ] 0.35 0.37 0.39 0.41 0.43 0.45 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? brown ? out ? 1[v] ta ? [ ] 0.15 0.17 0.19 0.21 0.23 0.25 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? brown ? out2[v] ta ? [ ] fig-47-13 vcc ovp voltage 2 fig-47-14 brown out detection voltage 1 fig-47-15 brown out detection voltage 2
datasheet d a t a s h e e t 40/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F basic characteristics (this data is for reference only and is not guaranteed.) 0.15 0.17 0.19 0.21 0.23 0.25 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? brown ? out ? hysterisis[v] ta ? [ ] 22 27 32 37 42 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? brown ? out ? delay1[ms] ta ? [ ] 87 97 107 117 127 137 147 157 167 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? brown ? out ? delay2[ms] ta ? [ ] fig-47-16 brown out hysteresis fig-47-17 brown out detection delay time 1 fig-47-18 brown out detection delay time 2 170 190 210 230 250 270 290 310 330 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? brown ? out ? delay3[ms] ta ? [ ] 50 70 90 110 130 150 170 190 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? acdet ? ron[ohm] ta ? [ ] 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? actimer ? vth[v] ta ? [ ] fig-47-19 brown out detection delay time 3 fig-47-20 acdet pin on resister fig-47-21 actimer pin input level 165 215 265 315 365 415 465 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? actimer ? pulldown[kohm] ta ? [ ] 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? pfcon/off ? vth[v] ta ? [ ] 50 70 90 110 130 150 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? pfcon/off ? pulldown[kohm] ta ? [ ] fig-47-22 actimer pin pull-down res. fig-47-23 pfcon/off pin i nput level fig-47-24 pfcon/off pin pull-down res. 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? latch/autor ? vth[v] ta ? [ ] 50 70 90 110 130 150 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? latch/autor ? pulldown[kohm] ta ? [ ] 0.37 0.42 0.47 0.52 0.57 0.62 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? comp ? vth[v] ? ta ? [ ] fig-47-25 latch/autor pin input level fig-47-26 latch/autor pin pull-down res. fig-47-27 comp pin detection voltage 19.4 21.4 23.4 25.4 27.4 29.4 31.4 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? comp ? pin ? pull \ up ? resistor ? [kohm] ? ta ? [ ] 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? thermister ? resistor[kohm] ? ta ? [ ] 5.0 5.5 6.0 6.5 7.0 7.5 8.0 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? latch ? release ? voltage[v] ta ? [ ] fig-47-28 comp pin pull-up resistor fig-47-29 external thermistor resistor fig-47-30 latch release voltage2
datasheet d a t a s h e e t 41/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F basic characteristics (this data is for reference only and is not guaranteed.) 70 90 110 130 150 170 190 210 230 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? latch ? mask ? time[us] ta ? [ ] 15 17 19 21 23 25 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? qr_fb ? pullup ? resistor[kohm] ta ? [ ] 0.95 0.96 0.97 0.98 0.99 1.00 1.01 1.02 1.03 1.04 1.05 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? cs ? over ? current ? detect1a[v] ? ta ? [ ] fig-47-31 latch mask time fig-47-32 qr_fb pin pull-up resistance fig-47-33 cs over-current detect voltage 1a 0.63 0.65 0.67 0.69 0.71 0.73 0.75 0.77 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? cs ? over ? current ? detect1b[v] ? ta ? [ ] 0.20 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.30 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? cs ? over ? current ? detect ? 1c[v] ? ta ? [ ] 0.65 0.70 0.75 0.80 0.85 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? cs ? over ? current ? detect ? 1d[v] ? ta ? [ ] fig-47-34 cs over-current detect vol.1b fig-47-35 cs over-current detect vol.1c fig-47-36 cs over-current detect vol.1d 0.05 0.10 0.15 0.20 0.25 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? cs ? over ? current ? detect ? 2a[v] ? ta ? [ ] 0.80 0.90 1.00 1.10 1.20 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? cs ? switched ? zt ? current[ua] ? ta ? [ ] 0.10 0.20 0.30 0.40 0.50 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? qr ? cs ? blanking ? timer[us] ta ? [ ] fig-47-37 cs over-current detect vol. 2a fig-47-38 cs swit ched zt current fig-47-39 cs leading edge blanking time 0.25 0.35 0.45 0.55 0.65 0.75 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? qr ? minimum ? on ? time[us] ta ? [ ] 106 111 116 121 126 131 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? qr ? max ? frequency1[khz] ta ? [ ] 24 26 28 30 32 34 36 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? qr ? max ? frequency2 ? [khz] ta ? [ ] fig-47-40 minimum on width fig-47-41 maximum operating frequency 1 fig-47-42 maximum operating frequency 2 1.15 1.20 1.25 1.30 1.35 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? frequency ? reduction ? start ? fb ? voltage ? [v] ta ? [ ] 0.35 0.40 0.45 0.50 0.55 0.60 0.65 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? frequency ? reduction ? end ? fb ? voltage ? [v] ? ta ? [ ] 1.70 1.80 1.90 2.00 2.10 2.20 2.30 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? gain[v/v] ta ? [ ] fig-47-43 freq. reduction start fb voltage fig-47-44 freq. reduction end fb voltage fig-47-45 voltage gain
datasheet d a t a s h e e t 42/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F basic characteristics (this data is for reference only and is not guaranteed.) 60 70 80 90 100 110 120 130 140 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? zt ? comparator ? voltage1[v] ta ? [ ] 5 10 15 20 25 30 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? zt ? timeout[us] ta ? [ ] 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? soft ? start ? timer[ms] ta ? [ ] fig-47-46 zt comparator voltage 1 fig-47-47 zt trigger timeout period fig-47-48 soft start time 2.5 2.6 2.7 2.8 2.9 3.0 3.1 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? fb ? olp ? 1a[v] ta ? [ ] 3.3 3.4 3.5 3.6 3.7 3.8 3.9 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? fb ? olp ? 2a[v] ta ? [ ] 44 54 64 74 84 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? fbolp ? timer[ms] ta ? [ ] fig-47-49 fb olp voltage 1a fig-47-50 fb olp voltage 2a fig-47-51 fb olp timer 3.2 3.3 3.4 3.5 3.6 3.7 3.8 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? zt ? ovp ? voltage ? [v] ta ? [ ] 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? qr_out ? pin ? nmos ? on ? resistor ? [ohm] ta ? [ ] 5.0 10.0 15.0 20.0 25.0 30.0 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? qr_out ? pin ? pmos ? on ? resistor ? [ohm] ta ? [ ] fig-47-52 zt ovp voltage fig-47-53 qr_out pin pmos on resistor fig-47-54 qr_out pin nmos on resistor 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? p_vs ? pin ? pull \ up ? current ? [ua] ta ? [ ] 2.48 2.49 2.50 2.51 2.52 2.53 2.54 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? gm ? amplifier ? normal ? voltage ? [v] ta ? [ ] 31 36 41 46 51 56 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? gm ? amplifier ? trans \ conductance ? [us] ta ? [ ] fig-47-55 p_vs pin pull-up current fig-47-56 gm amplifier normal voltage fig-47-57 gm amplifier trans-conductance 15 17 19 21 23 25 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? maximum ? gm ? amplifier ? source ? current ? [ua] ta ? [ ] 24 29 34 39 44 49 54 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? maximum ? gm ? amplifier ? sink ? current ? [ua] ta ? [ ] 181 191 201 211 221 231 241 251 261 271 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? p_vseo ? stop ? voltage ? 1 ? [mv] ta ? [ ] fig-47-58 max. gm amplifier source current fig-47-59 max. gm amplifier sink current fig-47-60 p_vseo stop voltage1
datasheet d a t a s h e e t 43/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F basic characteristics (this data is for reference only and is not guaranteed.) 88 98 108 118 128 138 148 158 168 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? p_vseo ? stop ? voltage ? 2[mv] ta ? [ ] 60 62 64 66 68 70 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? pfc ? oscillation ? frequency ? [khz] ta ? [ ] 250 350 450 550 650 750 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? pfc ? minimum ? pulse ? width ? [ns] ta ? [ ] fig-47-61 p_vseo stop voltage 2 fig-47-62 pfc oscillation frequency fig-47-63 pfc min. pulse width 90 91 92 93 94 95 96 97 98 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? pfc ? maximum ? duty ? [%] ta ? [ ] 0.9 1.0 1.1 1.2 1.3 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? p_cs ? over ? current ? limit ? voltage ? 1[v] ? ta ? [ ] 0.48 0.53 0.58 0.63 0.68 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? p_cs ? over ? current ? limit ? voltage ? 2[v] ? ta ? [ ] fig-47-64 pfc maximum duty fig-47-65 p_cs over current limit voltage1 fig-47-66 p_cs over current limit voltage 2 0.20 0.25 0.30 0.35 0.40 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? p_vs ? short ? protection ? voltage[v] ? ta ? [ ] 2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40 2.45 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? p_vs ? gain ? rise ? voltage ? [v ] ? ta ? [ ] 2.43 2.48 2.53 2.58 2.63 2.68 2.73 2.78 2.83 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? p_vs ? gain ? fall ? voltage ? [v ] ? ta ? [ ] fig-47-67 p_vs short protection voltage fig-47-68 p_vs gain rise voltage fig-47-69 p_vs gain fall voltage 2.53 2.58 2.63 2.68 2.73 2.78 2.83 2.88 2.93 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? p_vs ? over ? voltage ? protection ? voltage ? [v ] ? ta ? [ ] 16 21 26 31 36 41 46 \ 40 ?\ 20 ? 0 ? 20 ? 40 ? 60 ? 80 ? 100 ? p_vs ? over ? voltage ? protection ? timer ? [ms ] ? ta ? [ ] fig-47-70 p_vs over voltage protection voltage fig-47-71 p_vs over voltage protection timer
datasheet d a t a s h e e t 44/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F thermal loss the thermal design should set operation for the following conditions. (since the temperature shown below is the guaranteed tem perature, be sure to take a margin into account.) 1. the ambient temperature ta must be 85 or less. 2. the ic?s loss must be within the allowable dissipation p d . the thermal abatement characteristics are as follows. (figure 47) 0 100 200 300 400 500 600 700 800 900 1000 0 25 50 75 100 125 150 pd[mw] ta[] figure 48. sop24 temperature reduction peculiarity
datasheet d a t a s h e e t 45/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F use-related cautions (1) absolute maximum ratings damage may occur if the absolute maximum ratings such as fo r applied voltage or operating te mperature range are exceeded, and since the type of damage (short, open circ uit, etc.) cannot be determined, in case s where a particular mode that may exceed the absolute maximum ratings is considered, use of a physic al safety measure such as a fuse should be investigated. (2) power supply and ground lines in the board pattern design, power supply and ground lines sh ould be routed so as to achieve low impedance. if there are multiple power supply and ground lines, be careful with regar d to interference caused by common impedance in the routing pattern. with regard to ground lines in particular, be careful r egarding the separation of large current routes and small signa l routes, including the external circuits. also, with regard to a ll of the lsi?s power supply pins, in addition to inserting capa citors between the power supply and ground pins, when using capacitors there can be problems such as capacitance losses at low temperature, so check thoroughly as to wh ether there are any problems with the characteristics of the capacitor to be used before determining constants. (3) ground potential the ground pin?s potential should be set to the mini mum potential in relation to the operation mode. (4) pin shorting and attachment errors when attaching ics to the set board, be careful to avoid errors in the ic?s orientation or positi on. if such attachment errors occur, the ic may become damaged. also, damage may occur if foreign matter gets between pins, between a pin and a power supply line, or between ground lines. (5) operation in strong magnetic fields note with caution that these products may become damaged when used in a strong magnetic field. (6) input pins in ic structures, parasitic elements are inevitably formed accord ing to the relation to potential. when parasitic elements are active, they can interfere with circuit operations, can cause oper ation faults, and can even result in damage. accordingly, be careful to avoid use methods that enable parasitic elements to become active, such as when a voltage that is lower than the ground voltage is applied to an input pin. also, do not apply vo ltage to an input pin when there is no power supply voltage bei ng applied to the ic. in fact, even if a power supply voltage is bei ng applied, the voltage applied to each input pin should be ei ther below the power supply voltage or within the guaranteed values in the electrical characteristics. (7) external capacitors when a ceramic capacitor is used as an external capacitor, consider possible reduction to below the nominal capacitance due to current bias and capacitance fluctuation due to te mperature and the like before determining constants. (8) thermal design the thermal design should fully consider allowable dissipation (pd) under actual use conditions. also, use these products within ranges that do not put output tr beyond the rated voltage and aso. (9) rush current in a cmos ic, momentary rush current may flow if the inter nal logic is undefined when the power supply is turned on, so caution is needed with regard to the power supply coupling capaci tance, the width of power s upply and gnd pattern wires, and how they are laid out. (10) handling of test pins and unused pins test pins and unused pins should be handled so as not to c ause problems in actual use conditions, according to the descriptions in the function manual, app lication notes, etc. contact us regard ing pins that are not described. (11) document contents documents such as application notes are design documents used when designing applications, and as such their contents are not guaranteed. before finalizing an applic ation, perform a thorough study and evaluati on, including for external parts.
datasheet d a t a s h e e t 46/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F ordering information b m 1 0 5 1 f - g e 2 product name package f : sop24 packaging and forming specification e2: embossed tape and reel physical dimension tape and reel information marking diagram BM1051F lot no ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2000pcs e2 () direction of feed reel 1pin
datasheet d a t a s h e e t 47/47 ? 2013 rohm co., ltd. all rights reserved. tsz02201-0f1f0a200020-1-2 30.apr.2015 rev.003 www.rohm.com tsz22111 ? 15 ? 001 BM1051F revision history date revision changes 4.jun.2014 001 new release 11.apr.2015 002 p13, p16, p17, p23, p25, p31, p32, p37, p38 the note external application of vref when the latch mode is used. 11.apr.2015 002 p12 figure4->figur e6 (reference of start-up time) 11.apr.2015 002 p25 figure25->figure24 11.apr.2015 002 p25 figure26->figure25 30.apr.2015 003 p13, p16, p17, p23, p25, p31, p32, p37, p38 ? c is mentioned in the note of vref external application.
datasheet d a t a s h e e t notice-pga-e rev.001 ? 2015 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufac tured for application in ordinary elec tronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electroni c appliances, amusement equipment, etc.). if you intend to use our products in devices requiring ex tremely high reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecra ft, nuclear power controllers, fuel c ontrollers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (?specific applications?), please consult with the rohm sale s representative in advance. unless otherwise agreed in writing by rohm in advance, ro hm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ro hm?s products for specific applications. (note1) medical equipment classification of the specific applications japan usa eu china class class class b class class class 2. rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe desi gn against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditio ns, as exemplified below. accordin gly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of an y rohm?s products under any special or extraordinary environments or conditions. if you intend to use our products under any special or extraordinary environments or conditions (as exemplified bel ow), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] use of our products in any types of liquid, incl uding water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products ar e exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (ev en if you use no-clean type fluxes, cleaning residue of flux is recommended); or washing our products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] use of the products in places subject to dew condensation 4. the products are not subjec t to radiation-proof design. 5. please verify and confirm characteristics of the final or mounted products in using the products. 6. in particular, if a transient load (a large amount of load applied in a short per iod of time, such as pulse. is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 7. de-rate power dissipation (pd) depending on ambient temper ature (ta). when used in seal ed area, confirm the actual ambient temperature. 8. confirm that operation temperat ure is within the specified range descr ibed in the product specification. 9. rohm shall not be in any way responsible or liable for fa ilure induced under deviant condi tion from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the resi due of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be us ed on a surface-mount products, the flow soldering method must be used on a through hole mount products. if the flow sol dering method is preferred on a surface-mount products, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification
datasheet d a t a s h e e t notice-pga-e rev.001 ? 2015 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, pl ease allow a sufficient margin c onsidering variations of the characteristics of the products and external components, including transient characteri stics, as well as static characteristics. 2. you agree that application notes, re ference designs, and associated data and in formation contained in this document are presented only as guidance for products use. theref ore, in case you use such information, you are solely responsible for it and you must exercise your own indepen dent verification and judgment in the use of such information contained in this document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution in your manufacturing process and storage so that voltage exceeding t he products maximum rating will not be applied to products. please take special care under dry condit ion (e.g. grounding of human body / equipment / solder iron, isolation from charged objects, se tting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriora te if the products are stor ed in the places where: [a] the products are exposed to sea winds or corros ive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to di rect sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the co rrect direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. use products within the specified time after opening a hum idity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage time period. precaution for product label qr code printed on rohm products label is for rohm?s internal use only. precaution for disposition when disposing products please dispose them proper ly using an authorized industry waste company. precaution for foreign exchange and foreign trade act since concerned goods might be fallen under listed items of export control prescribed by foreign exchange and foreign trade act, please consult with rohm in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to application example contain ed in this document is for reference only. rohm does not warrant that foregoi ng information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. 2. rohm shall not have any obligations where the claims, actions or demands arising from the co mbination of the products with other articles such as components, circui ts, systems or external equipment (including software). 3. no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the products or the informati on contained in this document. pr ovided, however, that rohm will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the produc ts, subject to the terms and conditions herein. other precaution 1. this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any wa y whatsoever the products and the related technical information contained in the products or this document for any military purposes, incl uding but not limited to, the development of mass-destruction weapons. 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties.
datasheet datasheet notice ? we rev.001 ? 2015 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information.

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