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HFC0310 fixed-frequenc y fly b ack controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 1 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. the future of analog ic technology descri ption the HFC0310 is a flyback contro ller with fixed- frequency operation. the controller uses p eak current mode to provide exc e llent transient response and ease loop compensation. w hen the ou tput power falls below a given level, the cont roller enters burst mod e to lower the stand-by power consumptio n. an external capacitor connected between the fset pin and gnd programs the hfc031 0 switching fr equency. otherwise, th e HFC0310 uses a freq uency shaping function that greatly reduces the noise level, and reduces the cost of the emi filter. the hfc0 310 provides various protection s, such as the r mal shutdown, v cc un der-voltage lockout, o v er-load p r otection, over-voltage protection, a nd short-circuit protectio n . the h f c03 1 0 is availa ble in a soic8 packa ge . features ? programma ble switch in g frequency up to 600khz ? frequency shaping (3.5%) ? current-mo de operation ? very low start-up current (12 a) ? very low standby power consumption via active-burst mode ? internal 350 ns leading-e dge blankin g ? built-in 3ms soft-start fun c tion ? internal slop e compensation ? built-in pro pin pull-up (>3.25v) auto- restart function ? over-te m pe rature protection ? v cc under-voltage locko u t with hysteresis ? over-voltag e protection on vcc ? time-based over-load protection ? short-circuit protection appli c ations ? power mete rs ? switching mode power supplies ? ac/dc ada p ters, switching chargers all mp s pa r t s ar e le ad- fre e an d a dh er e to th e r ohs d i r e ctiv e. f o r m p s g r e e n sta t u s , plea se v isit mps w ebsite under quali t y assuran c e. ? m ps ? a nd ? t h e futu r e of an al og i c t e ch n o l o g y ? a r e reg i st er e d t r ad em a r ks o f monolithic power systems, inc. http://
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 2 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. typical application rtn a c i nput * * * t1 output fb HFC0310 1 2 3 4 5 6 7 8 pr o dr v nc cs gn d f set vc c
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 3 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. ordering information part number* package top marking free air temperature (t a ) HFC0310gs soic8 HFC0310 ?40c to +105c * for tap e & reel, ad d suf f ix ?z (e.g. hfc03 10gs ? z); package reference absolute m a xi mum ratings (1) vcc ................................................ ?0.3v to 30 v all other pins .................................. ?0.3v to 7 v continuous power dissipation (t a = +25c) (2) soic8 ...................................................... 1.04w junction te mperature ............................... 150c lead temperature .................................... 260c storage temperature ............... -60c to +150c thermal sh ut down .................................. 150c thermal sh ut down hysteresis .................. 40c esd capability human body mod e l (all pins except drain) ........................................... 2.0kv esd capabi lity machine model ................. 200v operating temperature........... ?40c to +105c recommended operation conditions (3) v cc to gnd ......................................... 8v to 20v maxi mum j unction temp. (t j ) .............. +125c thermal resistance (4) ja jc soic8 ..................................... 96 ...... 45 ... c/w notes : 1) exceeding these ratings ma y da m age the device. 2) the ma ximum allowable po w e r di ssipation is a fun c tion of the maximum junction temperatu r e t j (max), the junction-to- ambient the r mal resistance ja , a nd the ambient t e mperatu r e t a . the ma ximu m allowable con t inuous po w e r di ssipation at an y ambient te mperatu r e is ca lculated by p d (max) = (t j (max)-t a )/ ja . exceeding the maximum allowable po w e r dissipation w ill cause ex cessive die temper ature, and the regulator w ill g o into thermal shutdo w n . inte rnal thermal shutdo w n circuitr y p r otects the device from permanen t damage. 3) the device is not guaran teed to function outside of its operating conditions. 4) measured on jesd51-7, 4-layer pcb.
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 4 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. electri c al characteristi cs v cc =12v, t a =+25 c, u n less otherw i se noted parameter sy mbol conditio ns min t y p max unit driving signal (pin drv) sourcing re sistor r h 20 ? sinking re sistor r l 10 ? supply voltage management (pin vcc) v cc upper t u rn -on/off le vel v cch 11 12 13 v v cc , lower t u rn -on/off le vel v ccl 8.5 9.3 10 v start-up cu rrent i st v cc =v cch - 0.5v, before start up 12 20 a v cc ovp level v ovp 23.3 24.5 25.7 v v cc protection-ena b led re cha r ge l e vel v ccr 5.7 6.2 6.7 v internal ic consumption, protectio n phase i pro v cc =6.0v 8 10 a feedback management (pin fb) internal pull-up res i s t or r fb 12.5 14 15.5 k ? internal pull-up voltage v up 4.5 v fb to current -set?point di vision ratio i div 3 internal soft-start time t ss 3 ms falling fb le vel where the reg u lator enters bu rst mode v burl 0.5 v risi ng fb le vel where the regul ator exits burst mode v burh 0.7 v over-loa d set point v olp 3.5 3.8 4 v over-loa d delay time t dela y fs=100 khz 82 ms timing capa citor(fset) maximum vol t age on the f set cap acito r v fset ma x 0.83 0.87 0.91 v source curre n t i fset 45 53 61 a fset capa ci tor disch a rge time (active at drive turn o n ) t disch 400 ns freq uen cy spectrum sha p ing ra nge, in percenta ge of fs r shaping 3.5 % curre nt sam p ling manag e ment (cs) leadi ng-ed g e blankin g for current senso r t leb1 350 ns leadi ng-ed g e blankin g for scp t leb2 240 ns maximum current set-point v cs 0.91 0.95 0.98 v short-circ uit?protec tion set point v sc 1.55 1.65 1.75 v internal -slop e?compe nsa t ion ramp s ramp f s =100 khz 38 mv/ s protec tion management (pro) protectio n voltage v pro 3.1 3.25 3.4 v protectio n hy stere s i s v hy 0.2 v
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 5 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. pin functio n s packag e pin # name description 1 fset switchin g co nverter f r e q uen cy set. con n e c t a capa citor to gnd to set the switchi ng frequency up to 600khz. 2 v cc supply voltage. connect to a 47 f bulky capacitor and a 0.1 f ceramic capacitor for most applications. when v cc rises to 12v, the ic starts switchi ng; when it falls below 9.3v, the ic stops switching. 3 nc not connected. this pin ensures adequate creepage distance. 4 drv drive signal output. 5 cs primary current sense. 6 pro pull up pro to shut down the ic with hysteresis. 7 gnd ground. 8 fb feedback. the output voltage from the external co mpensation circuit is fed into this pin. this pin and the current sense signal from sour ce determines the pwm duty cycle. a feedback voltage of 3.8v triggers over-load protection, while 0.5v triggers burst-mode operation. the regulator exits burst-mode operation and enter s normal operation when the fb voltage reaches 0.7v
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 6 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. typical characteristics vcc lower level at which the ic switch off vs. temperature vcc ovp level vs. t emperature pin fb to current set point division ratio vs. t emperature fb decreasing level at which the regulator enter the burst mode vs. t emperature vcc re-charge level at which the protections occurs vs.t emperature over load set point vs. t emperature over load delay t ime vs. t emperature fb increasing level at which the regulator leave the burst mode vs. t emperature vcc upper level at which the ic switch on vs. temperature 11.0 11. 2 11. 4 11. 6 11. 8 12. 0 12. 2 12. 4 12. 6 12. 8 13. 0 - 50 - 30 - 10 10 30 50 70 90 110 130 vc c u p p e r level at which the ic switch on (v) 8.0 8.2 8.4 8. 6 8. 8 9. 0 9. 2 9. 4 9. 6 9. 8 10. 0 - 50 - 30 - 10 10 30 50 70 90 110 130 vc c l o w er l evel at w h i c h the ic switch off (v) 22.0 22.5 23.0 23.5 24.0 24.5 25.0 25. 5 26. 0 - 5 0 - 30 - 10 10 30 50 70 90 110 130 vcc ovp level (v) 5. 9 6. 0 6. 1 6. 2 6. 3 6. 4 6.5 6.6 6.7 -5 0 - 30 - 10 10 30 50 70 90 110 130 vcc re-c h a r g e l evel at w h i c h t h e pr ot e c t i ons oc c u r s ( v ) 3.10 3.15 3.20 3.25 3.30 3.35 3.40 3.45 3.50 -50 -30 -10 10 30 5 0 7 0 9 0 110 130 pin fb to current s e t poi nt di v i s i on ra t i o 0. 40 0. 42 0. 44 0.46 0.48 0.50 0.52 0.54 0.56 0.58 0.60 -50 -30 - 1 0 1 0 3 0 5 0 7 0 9 0 110 130 fb decreasing l evel at w h i ch th e re g u l a to r e n te r th e bu r s t mo d e (v ) 0.60 0.65 0.70 0.75 0.80 -50 -30 -10 10 30 50 70 90 110 130 f b i n cr easi n g l evel at w h i ch t h e r eg u l at o r l eave th e bu r s t mo d e (v ) 3.70 3.72 3.74 3.76 3.78 3.80 3.82 -50 -30 -10 10 30 50 70 90 110 130 o ver l o ad set po i n t ( v ) 81. 0 81. 2 81. 4 81. 6 81. 8 82. 0 82. 2 82. 4 82. 6 82. 8 83.0 -50 -30 -10 10 3 0 5 0 7 0 9 0 110 130 over l o ad d el ay t i me (ms)
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 7 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. typical characteristics (continued) 3.10 3. 15 3. 20 3. 25 3. 30 3. 35 3. 40 p r ot e c t i onv ol t a ge ( v ) 35.5 36. 0 36. 5 37. 0 37. 5 38. 0 38. 5 39. 0 -50 -30 -10 10 30 50 70 90 110130 1.50 1. 52 1. 54 1. 56 1. 58 1. 60 1. 62 1. 64 1. 66 1. 68 1. 70 0.90 0. 91 0. 92 0. 93 0. 94 0. 95 0. 96 0. 97 0. 98 0. 99 1. 00 0.80 0. 82 0. 84 0. 86 0. 88 0. 90 0. 92 0. 94 0. 96 0. 98 1. 00 - 50 - 30 - 10 10 30 50 70 90 110 130 - 50 - 30 - 10 10 30 50 70 90 110 130 maximum current set-point vs. temperature short circuit protection set point vs. t emperature chart internal slope compensation ramp vs. t emperature chart protection v oltage vs. t emperature maximum v oltage on fset capacitor vs. temperature -5 0 - 3 0 - 1 0 1 03 05 07 09 0 1 1 0 1 3 0 -50 -30 -10 10 30 50 70 90 110130 m axi m u m vo l t ag e on fs e t ca pacitor (v) maximum current set-point (v) short circuit protection set point (v)
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 8 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. typical perfo r manc e characteristics v in =230vac, v out1 =12v/0.8a, v out2 =8v/0.2a, v out3 =8v/0.05a, t a =+25c, unless otherwise noted. efficiency v out1 20mv/div . v out2 100mv/div . v out3 50mv/div. output voltage ripple full load output voltage ripple no load v ds 200v/div. stress v in = 420v ac , full load v in 100v/div. v out1 5v/div . v out2 5v/div . v out3 5v/div . input power startup full load input power startup no load input power shutdown full load input power shutdown no load 0 10 20 30 40 50 60 70 80 90 0 0.2 0.4 0.6 0.8 1 1.1 emi 150khz 30mhz -10 -20 10 0 20 50 40 30 60 70 80 en55022q en55022a 1 pk maxh 2 a v maxh 1 mhz 10 mhz sgl tds 6db 1 15v ac 230v ac v out1 50mv/div . v out2 10mv/div . v out3 10mv/div . v in 100v/div. v out1 5v/div . v out2 5v/div . v out3 5v/div . v in 100v/div . v out1 5v/div . v out2 5v/div . v out3 5v/div . v in 100v/div . v out1 5v/div . v out2 5v/div . v out3 5v/div .
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 9 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. typical perfo r manc e characteristics (c ontinued) v in =230vac, v out1 =12v/0.8a, v out2 =8v/0.2a, v out3 =8v/0.05a, t a =+25c, unless otherwise noted. v ds 100v/div . v cs 500mv/div . v fb 2v/div. v cc 10v/div . v ds 100v/div . v out1 10v/div . v fb 2v/div . v cc 10v/div . v ds 100v/div . v fb 2v/div . v cc 10v/div . v ds 100v/div . v out1 10v/div . v fb 2v/div . v cc 10v/div . v ds 100v/div . v out1 10v/div . v fb 2v/div . v cc 10v/div . v ds 100v/div . v cs 500mv/div . v fb 2v/div . v cc 10v/div . v ds 100v/div . v cs 500mv/div . v fb 2v/div . v cc 10v/div . scp entry full load scp recovery full load scp startup full load ovp entry full load ovp recovery full load ovp startup full load ocp protection full load v pro 100v/div . v ds 1v/div. pro protection v in =85v , 160v protection,full load
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 10 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. block diagram nc fset fb gnd vc c cs pro current comparator driving signal management extra protection power management frequency control fault management peak current compression drv olp b ur s t m ode co n t r o l scp ov p otp figure 1: fu nctional blo ck diagr a m
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 11 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. operation the hfc0 310 incorp orates all t he necessa ry features to build a reliable switch- m ode powe r supply. its h i gh level of integration r equires very few extern al components. i t h a s b u r s t - m o d e oper at io n t o minimize th e st an d-by powe r con s ump t ion a t ligh t lo ad. pr ote c tion fe at ure s ? su ch as a u to- r e c overy for over- l o ad pr ot ectio n (olp), sho r t - cir c uit pr ot e c t i on (scp), ove r-volta g e prot ection ( o vp), or th ermal shut d o wn ( t sd) for over-t emper atur e p r ot ect i on (otp)? con t r i bu te to a saf e r conve r ter d e sig n with out in cr easin g circu i t com p lex i ty . pwm operation the hfc03 10 is a fully integrated converter wi th adjustable-fr equency peak-current- m ode control pwm switching regulat ors. the out put voltage is measured at fb through a resistive voltage divider, amp lifier, and op tocoupler. t he voltage a t the fb pin is compared to t he internally measured switch curre nt to contr ol the outp ut voltage. the integrated mosf et turns on at t he beginning of each clock cycle. the current in the inductor increases until it reaches the value set by the fb voltage, and then th e integrate d mosfet tu rns off. start-up and v cc uvl o during start-up, the ic only consumes the start up current (typically 12a), and the current supplied t h rough the sta r t-up resisto r charges th e v cc capacitor. the ic starts switching and the curr ent increase s to 1ma whe n v cc reaches 12v. at t his point, th e transformer?s auxiliary winding po wers the ic. when v cc f alls below 9.3v, the regulator stop s switching a nd the current through the start up resistor char ges the v cc capacitor ag ain. 12 v 9. 3 v vcc drain switching pluses regulation o c curs here auxiliary winding takes charge figure 2: v cc uvlo the lower th resho l d o f v cc un der -vo l ta ge lo ck- ou t (uvlo) de crea se s fr om 9 . 3v t o 6. 2 v wh en f a u l t c o nd it io ns oc cu r, suc h as ol p, ovp, a n d ot p. soft-start to reduce stress on th e primary mosfet and the second ary diode during start - up and to smoothly establish th e output voltage, the HFC0310 has an inter nal soft-star t circu i t tha t gradually in creases the primary current sense threshold, which determines the mosfet pea k current during start-up. the pulse-width of the power switching device progressiv ely increase s to establish optimal oper ating cond itions until the feedback co ntrol loop ta kes charge. so f t st a r t v cs figure 3: soft start
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 12 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. sw itching frequenc y the capacitor between the fset pin and gnd sets the switching frequency of the HFC0310. estimate the oscillator frequency as per the equation below: s 9 6 1 fh z 0.87 400 1 0 c 53 1 0 ? ? = + over volta ge protection monitoring the v cc pin via a 20s time constant filter allows t he hfc031 0 to enter ovp during an over-voltage condition; t y pically wh en v cc goe s above 24.5v. the controller will resum e operation aft er the fault d i sappears. over-cu rre nt protection the hfc03 10 continuo usly monitors the fb pin. when fb pulls up to 3.8v, if after a 8192 switching cycle delay the fault signal is st ill present, the HFC0310 shuts down as soon as the power supply undergoes an ov erload. whe n the fault disappears, th e power supply resumes operation. short-circu it protection by monitori ng the cs pin, the hf c0310 shuts down when the voltage rises highe r than 1.65 v, to indicate a short cir c uit . the HFC0310 enters a safe low-po wer mode that prevents any letha l thermal or stress damage. as so on as the f ault disappears, the power supply resumes operation . thermal shutdow n when the temperature o f the ic e x c eeds 150c, the otp is activated and the controller ente r s auto-recovery mode. burst ope r ation to minimize stand-by power consumption, the HFC0310 i m plements burst mode at no load or light load. a s the load d ecreases, th e fb voltag e decreases. the ic stop s switch ing when the f b voltage drops below th e lower threshold, v br ul (0.5v). then the outpu t voltage drops at a rat e dependent on the load. this ca uses the fb voltage to rise again due to the negative feedback control loop. once the fb voltag e exceeds the upper threshold, v bruh (0.7v), t he switching p u lse re sumes. the fb voltage th en decreases a nd the whol e process repeats. burst- mode operation alternat ely enables and disable s the switching pulse of the mosfet. hence switching lo ss at no loa d or light lo ad condition s is greatly reduced. figure 4 shows the signals genera t ed by burst- mode operation. v fb v ds 0.7v 0.5v figure 4: bu rst-mode o p eration pro pin the pro p i n provides extra protection again s t abnormal conditions. u s e the pro pin for input ovp and/or other prot ections. if t he pro pin voltage exc eeds 3.25v, the ic shu t s down. as soon as the fault d i sap pears, the power supply resumes operation. leading-edge blanking (leb) in normal o peration, a shunt resistor between th e source pin and ground senses the primary pea k current. the fb voltage sets the turn-off threshold of the mosfet, v sense =v fb /3. when the shunt r e sistor volt age drops t o v sense , th e mosfet tu rns off. during start-up and over-load condition, th e primary pe ak current threshold is int e rna lly limited to 0.95v even if v fb volta ge exceeds 2.85v to av oid excessive output po wer and low e r the switch voltage rating .
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 13 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. in order to avoid turning off the mosfet by mis- triggered spikes shortly after the switch turns on, the ic implements a 350ns leading-edge blanking period. during blanking time, any trigger signal on the source pin is blocked. figure 5 shows the primary-current?sense waveform and the leading-edge blanking. figure 5: leading-edg e blanking design example the following is a de sign examp l e using th e application guidelines f or the given specification s : v in 85v to 420v v out1 12v v out2 8v v out3 8v f sw 100khz the detaile d applicatio n schematic is shown in figure 6. t he typical performance and circuit waveforms have bee n shown in the typi cal performance characteristics section. for more possible applications of this device, please refer to the related evaluation board datasheets.
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 14 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. typical application circuits 7448640415/10mh lx1 2 rt1 1m/1206 r2 1m/1206 r3 374k/1206 r10 374k/1206 r9 100k/1206 r15 51 r17 10k r18 1k r16 3.3/1%/1206 r19 2.2/1%/1206 r20 20k r31 10k/1% r33 c2 2.2nf c3 22pf c4 1nf c6 c8 c12 c13 10nf c18 fr107 d6 tl431k/2.5v u3 u2 pc817a 2k r30 cx1 560pf c7 c11 l1 5.1m/1206 r13 2.2/1206 r25 mur160 d8 38.3k/1% r32 fqp2n90 q1 HFC0310 drv 4 cs 5 nc 3 pro 6 v cc 2 gnd 7 fset 1 fb 8 u1 d9 murs320/200v/3a c1 d10 b1100/100v/1a d11 b1100/100v/1a c14 c16 c15 c17 2.2nf cy1 2.2m/1206 r6 2.2m/1206 r7 t1 10m/1206 r12 1k r29 10/1206 r26 2.2nf/250v c10 1nf c5 2.2m/1206 r8 2.2m/1206 r5 d7 1n4148 1n4007 d1 1n4007 d3 1n4007 d2 1n4007 d4 510k/1206 r24 510k/1206 r23 510k/1206 r22 n1 n2 n5 n4 n3 510k/1206 r21 10m/1206 r11 c9 100k/1206 r14 d5 smaj190a 1m/1206 r1 1m/1206 r4 tvr14471ks42y rv1 l n vout1: 12v/0.8a gnd1 vout2: 8v/0.2a vout3: 8v/50ma gnd2 85vac~420vac input ns r27 ns r28 l l figure 6: t y pical application schem a tic
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 15 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. flow chart start vcc>12v 81 92 co u n te r ? an d o l p = lo gic high charge vcc capacitor through start up reistor y n soft start monitor v fb monitor vcc v fb >3.8 v 0.5v0 .7 v n y olp= logic high y th e r ma l mo n i t o r y vcc decrease to 6.2v auxiliary winding supply the ic n continuous fault monitor vcc <9.3v y n v cc >24.5v n y tsd= logic high? y n uv l o , t s d , & ol p i s aut o r e s t ar t. ovp s hut of f t he s w it c h in g pulse y pin pro monitor logic low? y n
HFC0310 ?fixed-frequency f l yback controller hfc031 0 rev. 1 . 01 www.monolithicpower.com 16 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. signal evoluti o n in th e presence of faults 12v 9. 3v 6. 2v vc c d r i ver fa ul t fl a g o v p fa ul t o c c u rs h e re d r i ver p l u ses r e gul a t i on o ccu r s h er e sta r t u p n ormal operation normal operation normal operation o l p fa ul t o c c u rs h e re over v o l t ag e o c c u rs h e re no rm al operation ts d fa ul t o c c ur s he r e n o r m al o p e r at i o n no r m a l ope r a ti on no r m a l ope r a t i on 8192 s witching cycl e delay nor m al o p e r at i o n no r m a l ope r a t i on pro fa ul t o c c u rs h e re
HFC0310 ?fixed-frequency f l yback controller notice: t he i n formatio n in this docum ent i s subject to chang e w i t h o u t notice. users sh oul d w a rra nt and gu arante e that thir d part y i n tell ectu al pro pert y rig h ts are n o t inf r ing ed u p o n w hen integr atin g mps prod ucts into a n y ap p licatio n. mps w i ll not assume a n y le gal res pons ib ili t y for an y sai d app licati ons. hfc031 0 rev. 1 . 01 www.monolithicpower.com 17 6/19/2012 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. package informati o n soic8 0.016(0.41) 0.050(1.27) 0 o -8 o detail "a" 0 . 0 10( 0 . 25) 0.020(0.50) x 45 o see detail "a" 0 . 00 75 ( 0 . 19 ) 0 . 00 98 ( 0 . 25 ) 0.150(3.80) 0.157(4.00) pin 1 i d 0.050(1.27) bsc 0. 0 1 3(0 . 3 3 ) 0. 0 2 0(0 . 5 1 ) seating plane 0.004(0.10) 0.010(0.25) 0. 1 8 9(4 . 8 0 ) 0.197(5.00) 0. 0 53 ( 1. 35) 0. 0 69 ( 1. 75) top view front view 0.2 2 8(5 . 8 0 ) 0. 2 4 4(6 . 2 0 ) s ide view 14 85 reco mm ende d land p a ttern 0.2 13 ( 5 . 40) 0. 06 3 ( 1.6 0 ) 0. 050(1.27) 0. 02 4 ( 0.6 1 ) note: 1) contr o l dimen s ion is in inch es . dime ns ion in b rac ke t is in m i l l i m e t e r s . 2) pa cka ge le ngth doe s not in clu d e mold flas h, protrusi ons or gate burrs . 3 ) pa cka ge wid t h doe s not inclu d e inte rle a d flas h o r pr o t rus io ns . 4 ) lea d cop l a narity ( b ottom of l e a d s afte r for m in g ) s h a l l be 0. 0 0 4" inc h e s m a x . 5 ) dra w i n g conf orms to j e de c ms - 0 12 , v aria t ion a a . 6 ) dra win g is no t t o s c a l e . 0. 01 0 ( 0.25 ) b s c gauge pl an e

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