discontinued product for reference onl y. replaced by str-s6707 and str-s6708 the str-s5707 and STR-S5708 are specifically designed to meet the requirement for increased integration and reliability in off-line quasi- resonant flyback converters with indirect feedback. each 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. features quasi-resonant operation for low emi and high efficiency 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: part output current output power, p o number continuous, i c peak, i cm wide ac in 220/240 vac in str-s5707 6 a 12 a 90 w 140 w STR-S5708 7.5 a 15 a 120 w 180 w data sheet 28114a* off-line switching regulators ?with bipolar switching transistor + 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 ....................... 850 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 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-s5707 and STR-S5708
str-s5707 and STR-S5708 off-line quasi-resonant flyback switching regulators 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 functional block diagram allowable package power dissipation maximum safe operating area 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 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 30 3.0 0.3 collector-emitter voltage in volts collector current in amperes dwg. gk-002-1a 1.0 10 0 200 400 600 1000 0.5 5.0 800 STR-S5708 (15 a) str-s5707 (12 a) l = 6 mh i b1 = 2.5 a i b2 = 0.8 a t on = 100 s dc < 1% copyright ?1994 allegro microsystems, inc.
www.allegromicro.com str-s5707 and STR-S5708 off-line quasi-resonant flyback switching regulators 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 e 10.7 v output leakage current i cex v ce = 850 v, v be = -1.5 v e e 100 a output saturation voltage v ce(sat) str-s5707, i c = 2 a, i b = 400 ma e e 400 mv STR-S5708, i c = 3 a, i b = 600 ma e e 400 mv v be(sat) str-s5707, i c = 2 a, i b = 400 ma e e 1.5 v STR-S5708, i c = 3 a, i b = 600 ma e e 1.5 v dc current gain h fe v ce = 4 v, i c = 1 a 29 e 61 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-s5707 and STR-S5708 off-line quasi-resonant flyback switching regulators 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-001-2 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-S5708 str-s5707 typical characteristics
www.allegromicro.com str-s5707 and STR-S5708 off-line quasi-resonant flyback switching regulators 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-s5707 and STR-S5708 off-line quasi-resonant flyback switching regulators 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 note: exact body and lead configuration at vendor?s option within limits shown. 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)
www.allegromicro.com str-s5707 and STR-S5708 off-line quasi-resonant flyback switching regulators 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-s5707 and STR-S5708 off-line quasi-resonant flyback switching regulators 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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