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ir1167(a,b) s 1 www.irf.com ? 20 13 international rectifier nov 6 , 2013 smartrectifier tm control ic features ? s e c ondar y side high s peed sr c on t roller ? dcm, crcm and ccm f l y ba ck topologies ? 200 v proprie t ary ic t echnology ? max 500 khz switching frequency ? anti - bounce logi c and uvlo pro t e ct ion ? 7 a peak turn o ff drive curre nt ? mi c ropower st ar t - up & ultra low quie sc en t c urre nt ? 10.7 / 14.5 v ga t e drive clamp ? 50ns turn - off propaga t ion delay ? vcc range from 11.3 v to 20 v ? dire ct s en s ing of mosfet drain voltage ? minimal c omponen t count ? simple design ? l ead - f r ee ? compa t ible wi t h 1 w standby, e nerg y star, cecp, etc. typical applications ? lcd & pdp tv, telecom smps, ac - dc adapters, atx smps, server smps product summary topology flyback vd 200 v v out ir1167a 10.7 v ir1167b 14.5 v i o+ & i o - (typ. ) + 2 a / - 7 a turn on propagation delay (typ.) 60 ns turn off propagation delay (typ.) 40 ns package options 8 - lead soic ordering information base part number package type standard pack complete part number form quantity ir1167as soic8 n tape and reel 2500 IR1167ASTRPBF ir1167bs tape and reel 25 00 ir 1167 bs trpbf
ir1167(a,b) s 2 www.irf.com ? 20 13 international rectifier nov 6 , 2013 typical connection diagram ir1167(a,b)s rmot cdc rg vd 5 vs 6 mot 3 ovt 2 en 4 gnd 7 vgate 8 vcc 1 u1 ir11671 q1 xfm co load rdc vin rtn ci rs cs
ir1167(a,b) s 3 www.irf.com ? 20 13 international rectifier nov 6 , 2013 table of contents page ordering information 1 description 4 absolute maximum ratings 5 e lectrical characteristics 6 functional block diagram 8 lead definitions 9 lead assignments 9 detailed pin description 1 0 application information and additional details 1 1 package details 2 2 tape and reel details 2 3 part marking information 2 4 qualification information 2 5
ir1167(a,b) s 4 www.irf.com ? 20 13 international rectifier nov 6 , 2013 description ir1167s is a smart secondary side driver ic designed to drive n - channel power mosfets used as synchronous rectifiers in isolated flyback converters. the ic can control one or more paralleled n - mosfets to emulate the behavior of schottky diode rectifiers. the drain to source voltage is sensed differentially to determine the polarity of the current and turn the power switch on and off in proximity of the zero curre nt transi tion. ruggedness and noise immunity are accomplished using an advanced blanking scheme and double - pulse suppression which allow reliable operation in continuous, discontinuous and critical current mode operation and both fixed and variable frequen cy modes.
ir1167(a,b) s 5 www.irf.com ? 20 13 international rectifier nov 6 , 2013 absolute maximum ratings st ress beyond those listed under absolute maximum ratings may cause permanent damage to the device. ja ? ? ?
ir1167(a,b) s 6 www.irf.com ? 20 13 international rectifier nov 6 , 2013 electrical characteristics the electrical characteristics involve the spread of values guaranteed within the specified supply voltage and junction temperature range t j from C ? comparator section parameters s y m b ol min. typ. max. units remarks turn - off threshold v th1 - 7 - 3 .5 0 mv ovt = 0v, v s =0v - 15 - 10.5 - 7 ovt floating, v s =0v - 23 - 19 - 15 ovt = v cc , v s =0v turn - on threshold v th2 - 150 - 50 hysteresis v hyst 55 input bias current i ibias1 1 7.5 a v d = - 50mv i ibias2 30 100 v d = 200v comparator input offset v offset 2 mv gbd input cm voltage range v cm - 0.15 2 v one - shot section parameters s y m b ol min. typ. max. units remarks blanking pulse duration t blank 9 15 25 s r e s e t t hre s ho ld v th3 2 .5 v v cc =10v - gbd 5 .4 v cc =20v - gbd hysteresis v hyst3 40 mv v cc =10v - gbd
ir1167(a,b) s 7 www.irf.com ? 20 13 international rectifier nov 6 , 2013 electrical characteristics the electrical characteristics involve the spread of values guaranteed within the specified supply voltage and junction temperature range t j from C minimum on time section parameters symbol min. typ. max. units remarks minimum on time t o n min 190 240 290 ns r mot =5k : v cc =12v 2.4 3 3. 6 s r mot =75k : v cc =12v gate driver section parameters symbol min. typ. max. units remarks gate low voltage v glo 0.3 0.5 v i gate = 200ma gate high voltage ir1167a v gth 9 10.7 12.5 v cc =12v - 18v (internally clamped) ir1167b 12 14.5 16.5 v cc =12v - 18v (internally clamped) rise time t r1 18 ns c load = 1nf, v cc =12v t r2 125 c load = 10nf, v cc =12v fall time t f1 10 c load = 1nf, v cc =12v t f2 30 c load = 10nf, v cc =12v turn on propagation delay t don 60 80 v ds to v g ate - 100mv overdrive turn off propagation delay t doff 40 65 v ds to v gate - 100mv overdrive pull up resistance r up 4 ?
ir1167(a,b) s 8 www.irf.com ? 20 13 international rectifier nov 6 , 2013 functional block diagram u v l o & r e g u l a t o r v d v c c v t h 1 c o m e n a v g a t e v s v t h 3 v t h 1 v t h 2 v t h 3 v g a t e v d s m o t o v t m i n o f f t i m e r e s e t m i n o n t i m e r e s e t d r i v e r v c c v c c
ir1167(a,b) s 9 www.irf.com ? 20 13 international rectifier nov 6 , 2013 lead definitions pin# symbol description 1 v cc supply voltage 2 ovt offset voltage trimming 3 mot minimum on time 4 en enable 5 vd fet drain sensing 6 vs fet s o urce sensing 7 gnd ground 8 gate gate drive output lead assignments v d g n d v g a t e v s v c c m o t e n o v t 4 3 2 1 5 6 7 8 i r 1 1 6 7 s
ir1167(a,b) s 10 www.irf.com ? 20 13 international rectifier nov 6 , 2013 detailed pin description vcc: power supply this is the supply voltage pin of the ic and it is monitored by the under voltage lockout circuit. it is possible to turn off the ic by pulling this pin below the minimum turn off threshold voltage, without damage to the ic. to prevent noise problems, a bypass ceramic capacitor connected to vcc and gnd should be placed as close as possible to the ir1167s. this pin is internally clamped. ovt: offset voltage trimming the ovt pin will program the amount of input offset voltage for the turn - off threshold v th1 . the pin can be optionally tied to ground, to vcc or left floating, to select 3 ranges of input offset trimming. this programming feature allows for accommodating different r dson mosfets. mot: minimum on time the mot programming pin controls the amount of minimum on time. once v th2 is crossed for the first time, the gate signal will become active and turn on the power fet. spurious ringings and oscillations can trigger the input comparator off. the mot blanks the input comparator keeping the fet on for a minimum time. the mot is programmed between 200ns and 3us (typ.) by using a resistor referenced to gnd. en: enable this pin is used to activate the ic sleep mode by pulling the voltage level below 2.5v (typ). in sleep mode the ic will
ir1167(a,b) s 11 www.irf.com ? 20 13 international rectifier nov 6 , 2013 application information and additional details state diagram uvlo/sleep mode the ic remains in the uvlo condition until the voltage on the vcc pin exceeds the vcc turn on threshold voltage, v cc on . during the time the ic remains in the uvlo state, the gate drive circuit is inactive and the ic draws a quiescent current of i cc start . the uvlo mode is accessible from any other state of op eration whenever the ic supply voltage condition of vcc < v cc uvlo occurs. the sleep mode is initiated by pulling the en pin below 2.5v (typ). in this mode the ic is essentially shut down and draws a very low quiescent supply current. normal mode the ic enters in normal operating mode once the uvlo voltage has been exceeded. at this point the gate driver is operating and the ic will draw a maximum of i cc from the supply voltage source.
ir1167(a,b) s 12 www.irf.com ? 20 13 international rectifier nov 6 , 2013 general description the ir1167 smart rectifier ic can emulate the o peration of diode rectifier by properly driving a synchronous rectifier (sr) mosfet. the direction of the rectified current is sensed by the input comparator using the power mosfet r dson as a shunt resistance and the gate pin of the mosfet is driven accord ingly. internal blanking logic is used to prevent spurious transitions and guarantee operation in continuous (ccm), discountinuous (dcm) and critical (crcm) conduction mode. figure 1 : input comparator thresholds flyback application the modes of operation for a flyback circuit differ mainly for the turn - off phase of the sr switch, while the turn - on phase of the secondary switch (which corresponds to the turn off of the primary side switch) is identical. turn - on phase when the conduction phase of the sr fet is initiated, current will start flowing through its body diode, generating a negative v ds voltage across it. the body diode has generally a much higher voltage drop than the one caused by the mosfet on resistance and therefore will trigger the turn - on threshold v th2 . at that point the ir1167 will drive the gate of mosfet on which will in turn cause the conduction voltage v ds to drop down. this drop is usually accompanied by some amount of ringing, that can trigger the input comparator to turn o ff; hence, a minimum on time (mot) blanking period is used that will maintain the power mosfet on for a minimum amount of time. the programmed mot will limit also the minimum duty cycle of the sr mosfet and, as a consequence, the max duty cycle of the prim ary side switch. dcm/crcm turn - off phase once the sr mosfet has been turned on, it will remain on until the rectified current will decay to the level where v ds will cross the turn - off threshold v th1 . this will happen differently depending on the mode of operation. in dcm the current will cross the threshold with a relatively low di/dt. once the threshold is crossed, the current will star t flowing again through the body diode, causing the v ds voltage to jump negative. depending on the amount of residual cu rrent, v ds may trigger once again the turn on threshold: for this reason v th2 is blanked for a certain amount of time (t blank ) after v th1 has been triggered. the blanking time is internally set. as soon as v ds crosses the positive threshold v th3 also the blanking time is terminated and the ic is ready for next conduction cycle. v gate v th 1 v th 2 v th 3 v ds
ir1167(a,b) s 13 www.irf.com ? 20 13 international rectifier nov 6 , 2013 figure 2 : primary and secondary currents and voltages for dcm mode figure 3 : primary and secondary currents and voltages for crcm mode ccm turn - off phase in ccm mode the turn off transition is much steeper and di/dt involved is much higher. the turn on phase is identical to dcm or crcm and therefore wont be repeated here. i prim i sec v sec v prim time time t 1 t 2 t 3 i prim i sec v sec v prim time time t 1 t 2
ir1167(a,b) s 14 www.irf.com ? 20 13 international rectifier nov 6 , 2013 figure 4 : primary and secondary currents and voltages for ccm mode figure 5 : s econdary si de ccm operation i prim i sec v sec v prim time time t 1 t 2 i sec v ds time time t 1 t 2 v th 1 v th 2 v th 3 blanking mot time gate drive
ir1167(a,b) s 15 www.irf.com ? 20 13 international rectifier nov 6 , 2013 figure 6 : s econdary side d cm /crcm operation gate drive i sec v ds blanking time time t 1 t 2 v th 1 v th 2 v th 3 10 us blanking mot
ir1167(a,b) s 16 www.irf.com ? 20 13 international rectifier nov 6 , 2013 figure 7 : supply current vs. supply voltage figure 8 : undervoltage lockout vs. temperature figure 9 : v th1 vs. temperature figure 10 : v th2 vs. tempature
ir1167(a,b) s 17 www.irf.com ? 20 13 international rectifier nov 6 , 2013 figure 1 1 : comparator hysteresis vs. temperature figure 1 2 : v th 1 vs. temperature and common mode (ovt = gnd) figure 13 : v th2 vs. temperature and common mode (ovt = gnd) figure 14 : comparator hysteresis vs. temperature and common mode (ovt = gnd)
ir1167(a,b) s 18 www.irf.com ? 20 13 international rectifier nov 6 , 2013 figure 15 : mot vs. temperature figure 16 : input bias current vs. v d figure 17 : max. v cc voltage vs. synchronous rectifier switching freq, t j = 125 ? ? 1?, 1? hexfet gate resistance included ? ? 2?, 1? hexfet gate resistance included
ir1167(a,b) s 19 www.irf.com ? 20 13 international rectifier nov 6 , 2013 figure 19: max. v cc voltage vs. synchronous rectifier switching freq, t j = 125 ? ? 4?, 1? hexfet gate resistance included ? ? 6?, 1? hexfet gate resistance included C
ir1167(a,b) s 20 www.irf.com ? 20 13 international rectifier nov 6 , 2013 figure 21: v cc under voltage lockout figure 22 a : timing diagram
ir1167(a,b) s 21 www.irf.com ? 20 13 international rectifier nov 6 , 2013 figure 22 b : enable timing waveform v e n e n p o s i t i v e p u l s e w i d t h v e n h i v e n l o e n n e g a t i v e p u l s e w i d t h
ir1167(a,b) s 22 www.irf.com ? 20 13 international rectifier nov 6 , 2013 package details: soic8n
ir1167(a,b) s 23 www.irf.com ? 20 13 international rectifier nov 6 , 2013 tape and reel details: soic 8n e f a c d g a b h note : controlling dim ension in m m loaded tape feed direction a h f e g d b c carrier tape dimension for 8soicn code min max min max a 7.90 8.10 0.311 0.318 b 3.90 4.10 0.153 0.161 c 11.70 12.30 0.46 0.484 d 5.45 5.55 0.214 0.218 e 6.30 6.50 0.248 0.255 f 5.10 5.30 0.200 0.208 g 1.50 n/a 0.059 n/a h 1.50 1.60 0.059 0.062 metric imperial reel dimensions for 8soicn code min max min max a 329.60 330.25 12.976 13.001 b 20.95 21.45 0.824 0.844 c 12.80 13.20 0.503 0.519 d 1.95 2.45 0.767 0.096 e 98.00 102.00 3.858 4.015 f n/a 18.40 n/a 0.724 g 14.50 17.10 0.570 0.673 h 12.40 14.40 0.488 0.566 metric imperial
ir1167(a,b) s 24 www.irf.com ? 20 13 international rectifier nov 6 , 2013 part marking information n o n - l e a d f r e e r e l e a s e d i r 1 1 6 7 ( a , b ) i r l o g o y w w ? p a r t n u m b e r d a t e c o d e p i n 1 i d e n t i f i e r l o t c o d e ( p r o d m o d e C a s s e m b l y s i t e c o d e p e r s c o p 2 0 0 - 0 0 2 c x x x x m a r k i n g c o d e l e a d f r e e r e l e a s e d ? p
ir1167(a,b) s 25 www.irf.com ? 20 13 international rectifier nov 6 , 2013 qualification information ? qualification level industrial ?? &rpphqwv 7klv idplo\ ri ,&v kdv sdvvhg-('(&?v,qgxvwuldo txdolilfdwlrq ,5?v &rqvxphu txdolilfdwlrq ohyho lv judqwhg e\ extension of the higher industrial level. moisture sensitivity level msl2 ? ?? 260c (per ipc/jedec j - std - 020) rohs compliant yes ? 4xdolilfdwlrqvwdqgdugvfdqehirxqgdw,qwhuqdwlrqdo5hfwlilhu?vzhevlwh http://www.irf.com/ ?? higher qualification ratings may be available should the user have such requirements. please contact your international rectifier sales representative for further information. ??? higher msl ratings may be available for the specific package types listed here. please contact your international rectifier sales representative for further information. the information provided in this document is believed to be accurate and reliable. however, international rectifier assumes n o responsibility for the consequences of the use of this information. international rectifier assumes no responsibility for any in fringement of patents or of other rights of third parties which may result from the use of this information. no license is granted by implication or oth erwise under any patent or patent rights of international rectifier. the specifications mentioned in t his document are subject to change without notice. this document supersedes and replaces all information previously supplied. )ruwhfkqlfdovxssruwsohdvhfrqwdfw,5?v7hfkqlfdo$vvlvwdqfh&hqwhu http://www.irf.com/technical - info/ world headquarters: 233 kansas st., el segundo, california 90245 tel: (310) 252 - 7105

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