gisemi spec GS176PN rev 1 . 5 GS176PN green - power current mode pwm power switch general description GS176PN combines a d e dicated current mode pwm controller with a high voltage power mosfet. it is optimized for high performance, low standby power, and co st effective off - line flyback converter applications in sub 15 w range. GS176PN offers complete protection coverage with automatic self - recovery feature including cycle - by - cycle current limiting (ocp), over load protection (olp), vcc over voltage clamp and under voltage lockout (uvlo). excellent emi performance is achieved with gs proprietary frequency shuffling technique together with soft switching control at the totem pole gate drive output. the tone energy at below 20khz is minimized in the design and a udio noise is eliminated during operation. GS176PN is offered in dip - 8 package. features ? power on soft start reducing mosfet vds stress ? frequency shuffling for emi ? burst mode control for improved efficiency and minimum standby power design ? audio noise fr ee operation ? normal 50 khz switching frequency ? internal synchronized slope compensation ? low vcc startup current and low operating current ? leading edge blanking on current sense input ? pb - free dip - 8 ? good protection coverage with auto self - recovery ? vcc over v oltage clamp and under voltage lockout with hysteresis (uvlo) ? line input compensated cycle - by - cycle over - current threshold setting for constant output power limiting over universal input voltage range ? overload protection (olp) ? over voltage protection (ovp) applications offline ac/dc flyback converter for ? vcr, svr, stb, dvd&dvcd player smps ? set - top box power ? battery charger ? digital cameras and camcorder adaptor ? auxiliary power supply for pc and server ? open - frame smps typical application e m i f i l t e r ~ a c d c o u t g s 1 7 6 p n
GS176PN green - power current mode pwm power switch gisemi spec GS176PN rev 1 . 5 2 output power table package 230 vac 15% 85 - 265vac adapter1 peak or open frame2 adapter1 peak or open frame2 gs17 6 pn dip8 14w 1 7 w 13w 1 5 w table 1. notes: 1. minimum continuous power in a typical non - ventilated enclosed adapter mea sured at 50 c ambient. use of an external heatsink will increase power capability . 2. minimum peak power capability in any design or minimum continuous power in an open frame design (see key application considerations). 3. packages: p: dip8. general in formation pin assignment(dip8) pin descriptions absolute maximum ratings parameter value drain voltage (off state) - 0.3v to 6 5 0v v cc voltage - 0.3v to 30v vg input voltage - 0.3v to 30v v cc clamp continuous current 10 ma comp input voltage - 0.3v to 7v sense /source input voltage - 0.3v to 7v min/max operating junction temperature tj - 20 to 1 15 min/max storage temperature tstg - 55 to 160 lead temperature (soldering, 10secs) 260 note: stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. exposure to absolute maximum - rated conditions for extended periods may affect device reliability. electrical characteristics (ta=25c unless otherwise noted, vcc = 16v) symbol parameter test conditions min typ max unit supply voltage (vcc) vcc - on turn - on threshold voltage 14. 3 14.9 1 6 v vcc - off turn - o ff threshold voltage , under voltage lockout on vcc(uvlo) 8 .4 9.2 9.8 v i cc - st vcc start up current vcc=vcc - on - 0.1v 3 20 ua i cc - op operation current vcomp=3v 1. 5 3 ma vcc - ovp over voltage protection voltage s=0v, comp=3v ramp up vcc until gate clock is off 27.0 28.5 30.0 v vcc - clamp vcc zener clamp voltage i cc =10ma 30 v feedback input section(comp pin) v comp - o pen comp output high voltage 5. 2 5. 5 6 .0 v pin name description s en hv mosfet source pin. current sense input . vg internal gate driver power supply . vcc ic dc power supply input . comp feedback input pin. the pwm duty cycle is determined by voltage level into this pin and the current - s ense signal at pin 4. g nd ground d r hv mosfet drain pin. the drain pin is connected to the primary lead of the transformer. d r d r g n d g n d c o m p v c c v g s e n g s 1 7 6 p n
GS176PN green - power current mode pwm power switch gisemi spec GS176PN rev 1 . 5 3 i comp - s hort comp pin short circuit current short comp pin to gnd and measure current 0 . 55 ma v th - 0d zero duty cycle comp threshold voltage 0. 70 v v comp - ol comp open - loop trigger level 3. 8 0 v t d - o l p the delay time of comp pin open loop protection 50 ms z comp - in input impedance 4 k current sense input(source/sense pin) soft start time 4 ms t leb leading - edge blanking time 300 ns z sense - in input impedance 40 k t d - oc over current detection and control delay from over current occurs till the gate drive output start to turn off 120 ns v sthpe - oc peak threshold voltage for current limit comp=3.3v max duty cycle i nternal current limiting threshold voltage 0.85 0.9 0.95 v v s th va - oc valley threshold voltage for current limit comp=3.3v zero duty cycle i nternal current lim iting threshold voltage 0. 65 0 .70 0. 75 v oscillator section f osc normal oscillation frequency 45 50 55 khz f - t frequency temperature stability 5 % f - vcc frequency voltage stability 5 % d - max maximum duty cycle comp=3.3v, cs=0v 70 80 90 % f osc - b urst burst mode base frequency 22 khz f - osc frequency modulation range /base frequency frequency shuffl ing - 4 4 % peak - peak jitter 4 khz power mosfet section bv dss mosfet drain source breakdown voltage vgs=0v, ids=250ua 6 5 0 v r ds - on static drain to source on resistance vgs=10v, ids=1a GS176PN 4 . 6 5. 2
GS176PN green - power current mode pwm power switch gisemi spec GS176PN rev 1 . 5 4 characterization plots the c haracteristic graphs are normalized at ta=25 . i c c - s t ( u a ) v s . v c c ( v ) i c c - s t ( u a ) v c c ( v ) 0 5 1 0 1 5 2 0 0 2 4 6 8 1 0 1 2 1 4 t e m p e r a t u r e ( c ) v c c - o f f ( v ) v s . t e m p e r a t u r e ( c ) v c c - o f f ( v ) 8 . 8 8 . 9 9 . 0 9 . 1 9 . 2 9 . 3 - 4 0 - 1 0 2 0 5 0 8 0 1 1 0 1 3 . 8 1 4 . 3 1 4 . 8 1 5 . 3 1 5 . 8 - 4 0 - 1 0 2 0 5 0 8 0 1 1 0 t e m p e r a t u r e ( c ) v c c - o n ( v ) v s . t e m p e r a t u r e ( c ) v c c - o n ( v ) 0 . 4 0 . 6 0 . 8 1 . 0 1 . 2 0 1 5 3 0 4 5 6 0 7 5 v s t h - o c ( v ) v s . d u t y ( % ) v s t h - o c ( v ) d u t y ( % ) 1 . 0 2 . 0 3 . 0 4 . 0 5 . 0 - 4 0 - 1 0 2 0 5 0 8 0 1 1 0 t e m p e r a t u r e ( c ) i c c - s t ( u a ) v s . t e m p e r a t u r e ( c ) i c c - s t ( u a ) 4 8 . 0 4 9 . 0 5 0 . 0 5 1 . 0 5 2 . 0 - 4 0 - 1 0 2 0 5 0 8 0 1 1 0 t e m p e r a t u r e ( c ) f o s c ( k h z ) v s . t e m p e r a t u r e ( c ) f o s c ( k h z )
GS176PN green - power current mode pwm power switch gisemi spec GS176PN rev 1 . 5 5 package demensions dip - 8l dimensions symbol millimeters inches min. typ. max. min. typ. max. a 5.334 0.210 a1 0.381 0.015 a2 3.175 3.302 3.429 0.125 0.1 30 0.135 b 1.524 0.060 b1 0.457 0.018 d 9.017 9.271 10.160 0.355 0.365 0.400 e 7.620 0.300 e1 6.223 6.350 6.477 0.245 0.250 0.255 e 2.540 0.100 l 2.921 3.302 3.810 0.115 0.130 0.150 eb 8.509 9.017 9.525 0.335 0.355 0.375 ? 0? 7? 15? 0? 7? 15?
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