data sheet 28113.1* off-line switching regulators ?with bipolar switching transistor osc. + + over-current protection base collector uvlo common v in dwg. pk-001 inhibit fdbk fault latch ref. 1 2 3 4 5 6 7 r s fault 8 9 sink drive drive the STR-S6703 and str-s6704 are specifically designed to meet the requirement for increased integration and reliability in off-line quasi- resonant flyback converters. these devices incorporate 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 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, these devices and their fixed- frequency counterparts represent a significant advance in off-line smps reliability growth and integration. similar devices, with an output voltage rating of 850 v and output power ratings to 220 w, are available as the str-s6707 thru str-s6709. features quasi-resonant operation for low emi and high efficiency output power to 140 w low-power output standby mode 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: max. cont. peak part number current, i c current, i cm STR-S6703 6 a 12 a str-s6704 5 a 10 a absolute maximum ratings supply voltage, v in ........................... 15 v output voltage, v cex ....................... 500 v v ebo ................................................ 7 v continuous output current, i c .......................................... see table 1 ms single - pulse output current, i cm ........................................ see table sink current, i s ................................. 1.5 a drive current, i d .......................... -700 ma feedback current, i fdbk ................. 20 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-S6703 and str-s6704
115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 STR-S6703 and str-s6704 off-line quasi-resonant flyback switching regulators functional block diagram allowable package power dissipation maximum safe operating area proportional drive tsd over-volt. protect osc. r s q v in fdbk over-current protection common collector base sink drive 3300 pf 1 k ? 0.7 ? r ton r toff 0.75 v -1 v 1.4 v 5.1 v ref. fault latch + + + + inhibit 9 8 5 4 3 1 2 6 7 dwg. fk-001 uvlo 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 0 temperature in c allowable package power dissipation in watts mounting surface temperature dwg. gk-003-3 STR-S6703 (54 w) str-s6704 (50 w) 30 3.0 0.3 collector-emitter voltage in volts collector current in amperes dwg. gk-002-3 1.0 10 0 200 400 600 0.5 5.0 str-s6704 (10 a) STR-S6703 (12 a) 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-S6703 and str-s6704 off-line quasi-resonant flyback switching regulators www.allegromicro.com electrical characteristics at t a = +25 c, v in = 8.5 v, voltage measurements are refer- enced 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 C 10.7 v output leakage current i cex v ce = 500 v, v be = -1.5 v CC 100 a output saturation voltage v ce(sat) STR-S6703, i c = 2 a, i b = 400 ma CC 400 mv str-s6704, i c = 2 a, i b = 400 ma CC tbd mv v be(sat) STR-S6703, i c = 2 a, i b = 400 ma CC 1.5 v str-s6704, i c = 2 a, i b = 400 ma CC tbd v dc current gain h fe STR-S6703, v ce = 4 v, i c = 1 a 23 C 46 C str-s6704, v ce = 4 v, i c = 1 a 20 C 50 C maximum on time t on 33 C 41 s minimum off time t off 45 C 55 s over-current threshold v ocp(th) -0.9 -1.0 -1.1 v feedback threshold volt. v fdbk(th) C 650 C mv inhibit threshold voltage v inh(th) oscillation stops 0.65 0.75 0.85 v oscillation synchronized C 1.4 2.0 v oscillation stops (fault latch set) 3.2 5.1 5.6 v latch holding current i inh v in reduced from 10.7 v to 4 v CC 500 a latch reset voltage v q i in 100 a, v in reduced from 10.7 v 2.5 3.1 C v supply current i in(on) operating 15 C 28 ma i in(off) CC 200 a insulation rms voltage v wm(rms) all terminals simultaneous reference 2000 CC v metal plate against backside thermal shutdown t j 125 150 C c thermal resistance r jm output junction to mounting surface C 2.0 C c/w notes: negative current is defined as coming out of (sourcing) the specified device terminal. typical data is for design information only.
115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 STR-S6703 and str-s6704 off-line quasi-resonant flyback switching regulators typical characteristics 100 10 1.0 collector current in amperes dc current gain dwg. gk-001-3 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 STR-S6703
STR-S6703 and str-s6704 off-line quasi-resonant flyback switching regulators www.allegromicro.com typical quasi-resonant flyback converter warning: lethal potentials are present. see text. 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. precau- tions 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 C 5.79 lbf ? ft (6 C 8 kg ? cm or 0.588 C 0.784 nm). recommended metal-oxide-filled, alkyl-degenerated oil base, silicone grease: dow corning 340, or equivalent + voltage sense full-bridge rectifier ac input 100 v/120 v + output ?output + + dwg. ek-004a r sq + + + + 9 8 5 4 3 1 2 7 6 + +
115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 STR-S6703 and str-s6704 off-line quasi-resonant flyback switching regulators 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 C 0.004 0.177 0.028 package center lead center 1 9 0.033 +0.008 C 0.004 t ref. m dimensions in inches (for reference only) note: exact body and lead configuration at vendor s option within limits shown.
STR-S6703 and str-s6704 off-line quasi-resonant flyback switching regulators 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 C 0.1 4.5 0.7 package center lead center 1 9 0.85 +0.2 C 0.1 t ref m note: exact body and lead configuration at vendor s option within limits shown.
115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 STR-S6703 and str-s6704 off-line quasi-resonant flyback switching regulators switching regulator pmcms part number* application v i max p o power switch 3002m 5 v switching regulator and a 7.0-33 v C C 500 ma bipolar 9 v switching regulator?C 400 ma bipolar 3004m 5 v switching regulator and 7.0-33 v C C 500 ma bipolar dual 9 v switching regulator C 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 s6704 quasi-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 C C 3 a bipolar 8050s 5.0 v switching regulator 7.0-40 v C C 3 a bipolar 8090s 9.0 v switching regulator 12-40v C C 3 a bipolar 8120s 12 v switching regulator 15-40 v C C 3 a bipolar 8150s 15 v switching regulator 18-40 v C C 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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