discontinued product for reference onl y. replaced by str-s6703 data sheet 28114.1* off-line switching regulator ?with bipolar switching transistor the str-s5703 is specifically designed to meet the requirement for increased integration and reliability in off-line quasi-resonant flyback converters with indirect feedback. the device incorporates the primary control and proportional drive circuit with a third-generation high-voltage bipolar switching transistor. crucial system parameters such as maximum on time and off time are fixed during manufacture. local control circuit decoupling and layout are optimized within each device. cycle-by-cycle current limiting, under-voltage lock-out with hyster- esis, over-voltage protection, and thermal shutdown protect these devices during all normal and overload conditions. over-voltage protection and thermal shutdown are latched after a short delay. a primary-side error amplifier with reference is included to facilitate regulation from an auxiliary or bias winding of the power transformer. a versatile triple-level inhibit circuit includes the off time synchronization required to establish quasi-resonant operation. the inhibit function has also been expanded to initiate operation in stand-by mode in which the power supply delivers a small fraction of the steady-state output power. the dual requirements of dielectric isolation and low transient thermal impedance and steady-state thermal resistance are satisfied in an over- molded single-in-line power package. proven in substantial volumes, this device and its fixed-frequency counterparts represents a significant advance in off-line smps reliability growth and integration. similar devices with increased ratings are the str-s5707 and str-s5708. features quasi-resonant operation for low emi and high efficiency output power to 140 w low-power output standby mode indirect feedback from auxiliary winding reduces external component count pulse-by-pulse over-current protection latched over-voltage and thermal protection third-generation switching transistor with proportional drive maximum on time and off time set during manufacture internal under-voltage lockout with hysteresis over-molded sip with integral isolated heat spreader always order by complete part number: str-s5703 . str-s5703 + over-current protection base collector uvlo common v in dwg. pk-004 inhibit fault latch ref. 1 2 3 4 5 6 7 osc. r s fault 8 9 sink drive + drive 32 v sense + absolute maximum ratings supply voltage, v in ........................... 15 v output voltage, v cex ....................... 500 v v ebo ................................................ 7 v continuous output current, i c .................................................. 6.0 a 1 ms single - pulse output current, i cm ................................................. 12 a sink current, i s ................................. 1.5 a drive current, i d .......................... -700 ma inhibit voltage, v inh ........................... 15 v over-current protection voltage range, v ocp ............................................ 3.5 v insulation voltage, v wm(rms) .......... 2000 v package power diss., p d ........ see graph output junction temperature, t j .. +150 c internal frame temperature, t f ... +125 c operating temperature range, t a ............................... -20 c to +125 c storage temperature range, t stg ............................. -40 c to +125 c
str-s5703 off-line quasi-resonant flyback switching regulator 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 functional block diagram allowable package power dissipation maximum safe operating area proportional drive tsd over-volt . protect osc . r s q v in sense 7 over-current protection common collector base sink drive 3300 pf 1 k ? r ton r toff 0.75 v -1 v 1.4 v 5.1 v ref . fault latch + + + + inhibit 9 6 8 4 3 1 2 5 dwg. fk-001-1 uvlo 1500 pf 60 40 20 20 60 100 3.2 w 140 limited by frame temp. = +125 c max. recommended max. frame temp. = +100 c free air 54 w 0 temperature in c allowable package power dissipation in watts mounting surface temperature dwg. gk-003-2 30 3.0 0.3 collector-emitter voltage in volts collector current in amperes dwg. gk-002-2a 1.0 10 0 200 400 600 0.5 5.0 l = 6 mh i b1 = 2.5 a i b2 = 0.8 a t on = 100 s dc < 1% 100 300 500 700 copyright ?1994 allegro microsystems, inc.
str-s5703 off-line quasi-resonant flyback switching regulator www.allegromicro.com electrical characteristics at t a = +25 c, v in = 8.5 v, voltage measurements are referenced to common (pin 2) (unless otherwise noted). limits characteristic symbol test conditions min. typ. max. units on-state voltage v int turn-on, increasing v in 7.6 8.0 8.4 v under-voltage lockout v inq turn-off, decreasing v in 4.6 4.9 5.2 v over-voltage threshold v ovp(th) 9.2 e 10.7 v output leakage current i cex v ce = 500 v, v be = -1.5 v e e 100 a output saturation voltage v ce(sat) i c = 2 a, i b = 400 ma e e 400 mv v be(sat) i c = 2 a, i b = 400 ma e e 1.5 v dc current gain h fe v ce = 4 v, i c = 1 a 23 e 46 e maximum on time t on 33 e 41 s minimum off time t off 45 e 55 s over-current threshold v ocp(th) -0.88 -1.0 -1.12 v sense voltage v sense i sense = 3.2 ma 31.7 32.0 32.3 v inhibit threshold voltage v inh(th) oscillation stops 0.65 0.75 0.85 v oscillation synchronized e 1.4 2.0 v oscillation stops (fault latch set) 3.2 5.1 5.8 v latch holding current i inh v in reduced from 10.7 v to 4 v e e 500 a latch reset voltage v q i in 100 a, v in reduced from 10.7 v 2.5 3.1 e v ref. voltage temp. coeff. vz -20 c t f +100 c, i in = 3.2 ma e 2.5 e mv/ c supply current i in(on) operating 15 e 28 ma i in(off) e e 200 a insulation rms voltage v wm(rms) all terminals simultaneous reference 2000 e e v metal plate against backside thermal shutdown t j 125 150 e c thermal resistance r jm output junction to mounting surface e 2.0 e c/w notes: negative current is defined as coming out of (sourcing) the specified device terminal. typical data is for design information only.
str-s5703 off-line quasi-resonant flyback switching regulator 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 100 10 1.0 collector current in amperes dc current gain dwg. gk-001-1 3.0 30 0.01 0.1 1.0 10 100 5.0 50 0.03 0.3 3.0 30 v = 4 v ce typical characteristics
str-s5703 off-line quasi-resonant flyback switching regulator www.allegromicro.com typical quasi-resonant flyback converter warning: lethal potentials are present. see below. applications information warning ? these devices are designed to be operated at lethal voltages and energy levels. circuit designs that embody these components must conform with applicable safety requirements. precautions must be taken to prevent accidental contact with power-line potentials. do not connect grounded test equipment. the use of an isolation transformer is recommended during circuit development and breadboarding. recommended mounting hardware torque: 4.34 e 5.79 lbfft (6 e 8 kgcm or 0.588 e 0.784 nm). recommended metal-oxide-filled, alkyl-degenerated oil base, silicone grease: dow corning 340, or equivalent full-bridge rectifier ac input + + + output e output + dwg. ek-005a + + r sq 7 + + + + 9 6 8 4 3 1 2 5
str-s5703 off-line quasi-resonant flyback switching regulator 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 0.276 0.016 dwg. mk-003-9 in 0.953 0.008 0.610 0.008 0.118 0.130 0.008 ? 1.49 0.012 0.016 0.100 0.004 0.709 0.008 0.216 0.008 0.216 0.130 0.004 0.026 +0.008 e0.004 0.177 0.028 package center lead center 1 9 0.033 +0.008 e0.004 t ref. m dimensions in inches (for reference only) note: exact body and lead configuration at vendor?s option within limits shown.
str-s5703 off-line quasi-resonant flyback switching regulator www.allegromicro.com dimensions in millimeters (controlling dimensions) dwg. mk-003-9 mm 24.2 0.2 15.5 0.2 3.0 3.3 0.2 ? 23.0 0.3 0.4 2.54 0.1 18.0 0.2 5.5 0.2 7.0 0.4 5.5 3.3 0.1 0.65 +0.2 e0.1 4.5 0.7 package center lead center 1 9 0.85 +0.2 e0.1 t ref m note: exact body and lead configuration at vendor?s option within limits shown.
str-s5703 off-line quasi-resonant flyback switching regulator 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 switching regulator pmcms part number* application v i max p o power switch 3002m 5 v switching regulator and a 7.0-33 v 500 ma bipolar 9 v switching regulator 400 ma bipolar 3004m 5 v switching regulator and 7.0-33 v 500 ma bipolar dual 9 v switching regulator 2 x 400 ma bipolar s5703 quasi-resonant flyback converter 110/120 v 140 w 500 v 6 a bipolar s5707 quasi-resonant flyback converter 85-265 v 90 w 850 v 6 a bipolar 220/240v 140 w s5708 quasi-resonant flyback converter 85-265 v 120 w 850 v 7.5 a bipolar 220/240 v 180 w s6703 quasi-resonant flyback converter 110/120v 140 w 500 v 6 a bipolar s6704quasi-resonant flyback converter 110/120 v 100 w 500 v 5 a bipolar s6707 quasi-resonant flyback converter 85-265 v 90 w 850 v 6 a bipolar 220/240 v 140 w s6708 quasi-resonant flyback converter 85-265 v 120 w 850 v 7.5 a bipolar 220/240 v 180 w s6709 quasi-resonant flyback converter 85-265 v 160 w 850 v 10 a bipolar 220/240 v 220 w 8033s 3.3 v switching regulator 5.5-28 v 3 a bipolar 8050s 5.0 v switching regulator 7.0-40 v 3 a bipolar 8090s 9.0 v switching regulator 12-40v 3 a bipolar 8120s 12 v switching regulator 15-40 v 3 a bipolar 8150s 15 v switching regulator 18-40 v 3 a bipolar * complete part number includes additional characters to indicate operating temperature range and/or package style. ? also includes linear regulator output for 15.7 v at 1.0 a. without heat sink. the products described here are manufactured in japan by sanken electric co., ltd. for sale by allegro microsystems, inc. sanken electric co., ltd. and allegro microsystems, inc. reserve the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of their products. therefore, the user is cautioned to verify that the information in this publication is current before placing any order. these products are not authorized for use as critical components in life-support appliances, devices, or systems without express written approval. the information included herein is believed to be accurate and reliable. however, sanken electric co., ltd. and allegro microsystems, inc. assume no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
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