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?2002 fairchild semiconductor corporation www.fairchildsemi.com rev.1.0.0 features ? primary side regulation ? external sync terminal/soft start ? burst mode operation to reduce the power loss at the standby mode ? reference voltage changed by external sync and vfb ? wide operating frequency range up to 150khz ? pulse by pulse over current limiting ? low start-up current (max:80ua) ? low operating current (max:15ma) ? over voltage protection (auto restart mode) ? over load protection (auto restart mode) ? over current protection (auto restart mode) ? internal thermal shutdown (auto restart mode) ? under voltage lockout ? internal high voltage sensefet application ? monitor smps description the fairchild power switch(fps) product family are spe- cially designed for an off-line smps with minimal external components. the fairchild power switch(fps) consists of a high voltage power sensefet and a current mode pwm ic. included pwm controller features the integrated oscillator to be synchronized with the external sync, the under voltage lockout, the optimized gate turn on/turn off driver, the ther- mal shutdown protection, the over voltage protection, and the temperature compensated precision current sources for the loop compensation and the fault protection circuitry. compared with a discrete mosfet and a controller or a rcc switching converter solution, the fairchild power switch(fps) can reduce the total component count, design size, and weight and at the same time increase efficiency, productivity, and system reliability. it has a basic platform well suited for the cost effective monitor power supply. to-220-5l 1 1. drain 2. gnd 3. v cc 4. feedback 5. sync internal block diagram rsenese uvlo reset (vcc=9v) tsd (tj=160 ) s q' r vref osc filter (120nsec) s q r 3 3 3 3 1 1 1 1 2 2 2 2 5 5 5 5 4 4 4 4 vref 2.5r r vref uvlo ron roff pwm ocl olp ovp vth=7.5v vcc vth=30v vth=1v vfb offset idelay vcc burst mode detector (vfb<0.8v& vss>3v& no sync) vref 0.5ms delay burst mode controller vbias internal bias drain drain drain drain vcc vcc vcc vcc soft start & soft start & soft start & soft start & sync sync sync sync feedback feedback feedback feedback gnd gnd gnd gnd ifb fs8s0765rc fairchild power switch(fps)
fs8s0765rc 2 pin definitions pin number pin name pin function description 1drain high voltage power sensefet drain. this pin is designed to drive the transformer directly and is capable of switching a maximum of 650v and 4a. 2 gnd this pin is the control ground and the sensefet source. 3vcc vcc is regulated at 22v during the normal mode by the internal vcc feedback loop. during the off mode vcc fluctuates between 11v and 12v. 4 feedback this pin is connected to the inverting input of the pwm comparator through two diodes and a resistor divider. for stable operation, a capacitor should be placed between this pin and gnd. 5 soft start & sync this pin performs the soft start operation and detects the external sync signal.
fs8s0765rc 3 absolute maximum ratings (ta=25 c, unless otherwise specified) notes: 1. tj=25 c to 150 c 2. repetitive rating: pulse width limited by maximum junction temperature 3. l=14mh, starting tj=25 c 4. l=13uh, starting tj=25 c parameter symbol value unit drain-source(gnd) voltage (1) v dss 650 v drain-gate voltage (r gs =1m ? )v dgr 650 v gate-source (gnd) voltage v gs 30 v drain current pulsed (2) i dm 28 a dc single pulsed avalanche energy (3) e as 370 mj single pulsed avalanche current (4) i as 17 a continuous drain current (tc = 25c) i d 7a dc continuous drain current (t c =100 c) i d 4.5 a dc supply voltage v cc 35 v input voltage range v fb -0.3 to vcc v v s_s -0.3 to 10 v total power dissipation p d (watt h/s) 145 w derating 1.16 w/ c operating junction temperature t j +150 c operating ambient temperature t a -25 to +85 c storage temperature range t stg -55 to +150 c
fs8s0765rc 4 electrical characteristics (sensefet part) (ta=25 c unless otherwise specified) note: (1) pulse test : pulse width 300 s, duty 2% parameter symbol condition min. typ. max. unit drain source breakdown voltage bv dss v gs =0v, i d =250 a 650 - - v zero gate voltage drain current i dss v ds =650v, v gs =0v - - 200 a v ds =520v v gs =0v, t c =125 c - - 300 a static drain source on resistance (1) r ds(on) v gs =10v, i d =3.5a - 1.4 1.6 ? forward transconductance gfs v ds =40v, i d =3.5a - 8 - mho input capacitance ciss v gs =0v, v ds =25v, f = 1mhz - 1415 - pf output capacitance coss - 100 - reverse transfer capacitance crss - 15 - turn on delay time td(on) v dd =325v, i d =6.5a (mosfet switching time is essentially independent of operating temperature) -25- ns rise time tr - 60 - turn off delay time td(off) - 115 - fall time tf - 65 - total gate charge (gate-source+gate-drain) qg v gs =10v, i d =6.5a, v ds =325v (mosfet switching time is essentially independent of operating temperature) -40- nc gate-source charge qgs - 7 - gate-drain (miller) charge qgd - 12 -
fs8s0765rc 5 electrical characteristics (continued) (ta=25 c unless otherwise specified) note: 1. these parameters, although guaranteed at the design, are not tested in mass production. 2. these parameters, although guaranteed, are tested in eds(wafer test) process. parameter symbol condition min. typ. max. unit uvlo section start threshold voltage v start v fb =gnd 14 15 16 v stop threshold voltage v stop v fb =gnd 8 9 10 v oscillator section initial frequency f osc -182022khz voltage stability f stable 12v vcc 23v 0 1 3 % temperature stability (1) ? f osc -25 c ta 85 c0 510 % maximum duty cycle d max -929598% minimum duty cycle d min ---0% feedback section feedback source current i fbso v fb =gnd 0.7 0.9 1.1 ma feedback sink current i fbsi v fb= 4v,v cc =19v 2.4 3.0 3.6 ma shutdown feedback voltage v sd vfb 6.9v 6.9 7.5 8.1 v shutdown delay current idelay v fb =5v 1.6 2.0 2.4 a protection section over voltage protection v ovp vcc 27v 27 30 33 v over current latch voltage (2) v ocl - 0.95 1.0 1.05 v thermal shutdown temp.(1) t sd - 140 160 - c sync & softstart section softstart vortage v ss vfb=2 4.7 5.0 5.3 v softstart current i ss vss=0v 0.8 1.0 1.2 ma sync high threshold voltage v sh vcc=16v,vfb=5v 6.7 7.2 7.9 v sync low threshold voltage v sl vcc=16v,vfb=5v 5.4 5.8 6.2 v
fs8s0765rc 6 electrical characteristics (continued) note: 1. these parameters indicate inductor current. 2. these parameters are the current flowing in the control ic. parameter symbol condition min. typ. max. unit vcc regulation section(normal mode) normal mode regulation voltage v ccno vfb=4v, fsync=25khz ifb=900ua 21.56 22.0 22.44 v transconductance gm vfb=4v, fsync=25khz - 2.0 - ma/v vcc regulation temperature stability ? vcc vfb=4v, fsync=25khz - 2.0 - % burst modesection(dpms mode) burst mode high threshold voltage v buh vfb=0v 11.6 12 12.4 v burst mode low threshold voltage v bul vfb=0v 10.6 11 11.4 v burst mode enable fb voltage v bufb vcc=10.5v 0.7 0.8 0.9 v burst mode enable s_s voltage v buss vcc=10.5v,vfb=0v 2.5 3.0 3.5 v burst mode enable delay time t budt vcc=10.5v,vfb=0v - 0.5 - ms burst mode frequency f bu vcc=10.5v,vfb=0v 32 40 48 khz current limit(self-protection)section peak current limit(1) i over - 3.52 4.0 4.48 a burst mode peak current limit i bu_pk - 0.45 0.6 0.75 a total device section start up current i start v cc =vstart-0.1v - 40 80 ua operating supply current (2) i op vfb=gnd, v cc =16v -915ma i op(min) vfb=gnd, v cc =12v i op(max) vfb=gnd, v cc =27v
fs8s0765rc 7 typical performance characteristics (these characteristic graphs are normalized at ta= 25 c) -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 start up current vs temp. temperature[ ] -40-20 0 20406080100120140160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 operating supply current vs temp. temperature[ ] -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 start threshold voltage vs temp. temperature[ ] -40-20 0 20406080100120140160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 stop threshold voltage vs temp. temperature[ ] -40-20 0 20406080100120140160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 initial freqency vs temp. normalized to 25 temperature[ ] -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 maximum duty cycle vs temp. temperature[ ] figure 1. start up current vs. temp. figure 2. operating supply current vs. temp. figure 3. start threshold voltage vs. temp. figure 4. stop threshold voltage vs. temp. figure 5. initial freqency vs. temp. figure 6. maximum duty cycle vs. temp.
fs8s0765rc 8 typical performance characteristics (continued) (these characteristic graphs are normalized at ta= 25 c) -40 -20 0 20 40 60 80 100 120 140 160 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 normalized to 25 feedback offset voltage vs temp. temperature[ ] -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 shutdown delay current vs temp. temperature[ ] -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 shutdown feedback voltage vs temp. temperature[ ] -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 softstart voltage vs temp. temperature[ ] normalized to 25 -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 over voltage protection vs temp. normalized to 25 temperature[ ] figure 7. feedback offset voltage vs. temp. figure 9. shutdown delay current vs. temp. figure 10. shutdown feedback voltage vs. temp. figure 11. soft start voltage vs. temp. figure 12. over voltage protection vs. temp. -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 feedback sink current vs temp. temperature[ ] figure 8. feedback sink current vs. temp.
fs8s0765rc 9 typical performance characteristics (continued) (these characteristic graphs are normalized at ta= 25 c) -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 normal mode regulation voltage vs temp. temperature[ ] -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 transconductance vs temp. temperature[ ] -40 -20 0 20 40 60 80 100 120 140 160 0.8 0.9 1.0 1.1 1.2 1.3 1.4 normalized to 25 feedback sink current vs temp. temperature[ ] -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 burst mode low threshold voltage vs temp. temperature[ ] -40 -20 0 20 40 60 80 100 120 140 160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 burst mode high threshold voltage vs temp. temperature[ ] figure 13. normal mode regulation voltage vs. temp. figure 14. transconductance vs. temp. figure 15. feedback sink current vs. temp. figure 16. burst mode low threshold voltage vs. temp. figure 17. burst mode high threshold voltage vs. temp. -40-20 0 20406080100120140160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 burst mode enable fb voltage vs temp. temperature[ ] figure 18. burst mode enable voltage vs. temp.
fs8s0765rc 10 typical performance characteristics (continued) (these characteristic graphs are normalized at ta= 25 c) -40-20 0 20406080100120140160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 burst mode peak current vs temp. temperature[ ] -40-20 0 20406080100120140160 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 normalized to 25 peak current limit vs temp. temperature[ ] figure 19. burst mode peak current vs. temp. figure 20. peak current vs. temp.
fs8s0765rc 11 function information 1. start up circuit : to guarantee stable operation of the control ic, the fs8s0765rc has the uvlo circuit with 6v hysteresis. the vcc start up voltage is 15v and the stop volt- age is 9v. when the vcc reaches 15v, the control ic oper- ates. once the control ic start operating, it continues to operate until the vcc is below the stop voltage, 9v. figure 1. strat up with hysteresis 2. the primary side regulation : to control the transformer output, the fps compares the feedback voltage with the current sensing voltage. to generate the feedback voltage, the existing fps uses the photo coupler and tl431, etc in the secondary side regulation smps. but in the smps using the fs8s0765rc, these components do not need. the regulation circuit to control the feedback voltage is built in the control ic as shown figure 2. during the normal operation, the vcc voltage is regulated to 22v by the vcc reference voltage, v1. and at burst mode, the vcc voltage fluctuates between 11v to 12v by the reference voltage, v2. figure 2. circuit for the primary side regulation 3. protection function : the fs8s0765rc has 3 self protective functions(ocp, olp and tsd). because it does not require the additional external components, the reliability can be achieved without cost increase. these protection functions operate in auto restart mode. the protection is reset when the vcc voltage goes below 9v. the control ic operates again when the vcc voltage is recharged to 15v. figure 3. auto restart operation after protection 3.1 over current protection(ocp) : although the cycle by cycle over current limit tries to limit the peak current to a predetermined level, it can not work during the leading edge blanking. when the secondary rectifying diodes or the transformer pins are shorted, a steep current with extremely high di/dt can flow during the leading edge blanking. the ocp block is added to ensure the reliability. it turns off the sensefet within 300ns after the abnormal over current con- dition is sensed. figure 4. ocp block 3.2 over load protection(olp) : during the over load condition, the ouput of the internal error amp(amp1) shown in the figure 2 is zero. the feedback voltage, vfb is charged up by the internal current source of 2ua. when vfb touches 7.5v, the olp block is activated as shown in figure 5. vstop=9v vstart=15v 80ua ovp vcc icc 15ma vcc vbias v1 4 3 2ua 0.9ma cfb d1 d2 idelay ifb nvcc nvo gate driver np vfb fairchild power switch(fs8s0765rc) fairchild power switch(fs8s0765rc) fairchild power switch(fs8s0765rc) fairchild power switch(fs8s0765rc) 1 2 drain gnd v2 burst signal cd dc link voltage amp1 amp2 time time v v 15v 9v vcc vds protection operating (o cp ,o lp or ts d ) auto restart 22v gate driver ocp comp. vs e n s e : 1 v sensefet s q' r ovp olp tsd uvlo pwm comp
fs8s0765rc 12 figure 5. the waveforms at the olp and auto restart 3.3 thermal shutdown(tsd) : the sensefet and the control ic are built in one package. this makes it easy for the control ic to detect the heat generation from the sensefet. when the temperature exceeds approximately 160 c , the thermal shutdown operates. 4. soft start : during the initial start up, the sink current of the internal error amp(amp1) shown in the figure 2 remains zero. during this period, the soft start capacitor, css is charged by the 0.9ma current source and the 50k resistor from 5v voltage source and the feedback capacitor, cfb is charged by the 0.9ma current source and the 2ua current, as shown in the figure 6. by choosing much bigger css than cfb, the feedback voltage, vfb is increased slowly forcing the sensefet current to increase slowly. after vfb reaches its steady state value, only the current through the 50k resistor charges the css exponentially. if the value of css is too large so the rising speed of vfb is higher than that of the soft start voltag, vss, there is possibility that vfb touches 7.5v, the over load detection level during the soft start period. in order to avoid this phenomenon, it is recom- mended that the value of css should not exceed 100 times of cfb. figure 6. the circuit for the soft start 5. synchronization : it is well known that the synchronization method is the best way to eliminate the screen noise of the crt monitor. the switching frequency of the fs8s0765rc can vary from 20 khz to 150 khz by an external sync signal. the internal sync comparator detects the sync signal and determines the sensefet turn-on time. during the high pulse of the sync comparator output voltage, the sensefet remains an off state. the sensefet is turned on at the negative edge of the sync comparator output voltage. the reference voltage of the sync comparator is an inverted sawtooth with the base frequency of 20khz and with the varying range between 5.8v and 7.2v, as shown in the figure 7 and figure 8. the inverted sawtooth reference gets rid of the excessive switching noise at the very first synchronized turn-on. the external sync signal is rec- ommended to have an amplitude of minimum, 4.2v. figure 7. the circuit for the synchronization with external sync figure 8. the waveforms at the synchronization. 6. sync detector and burst operation : at the power saving mode(off mode), the fs8s0765rc reduces the output volt- ages to almost half of the normal value and enters into the burst mode in order to make the power dissipation minimize. the fs8s0765rc enters the power saving mode when the voltage on pin #5(vss) is higher than 3v, there is no sync time time v v 15v 9 v vcc vds over load protection auto restart time v 7.5v vfb 22v g at e dri ver osc 4 vo ffs et 2.5r r pwm comp . 2ua 0.9ma cfb d s 5 vref fs8s0765rc fs8s0765rc fs8s0765rc fs8s0765rc 50k cs s rs s d3 gate dri ver osc 4 vof fs et 2.5r r pw m com p. 2ua 0.9ma cfb d s 5 vref css rss d3 fs8s0765rc fs8s0765rc fs8s0765rc fs8s0765rc 5 sync comp. 7.2v 5.8v external external external external sync sync sync sync 5.8v 7.2v sync threshold external sync clk 5v
fs8s0765rc 13 signal, and the voltage on pin #4(vfb) is lower than 0.8v. figure 9. the operation of the fs8s0765rc at the normal mode and the off mode during the power saving mode, the vcc which was regulated at 22v during the normal mode, fluctuates between 11v and 12v. when the vcc touches 11v, the fs8s0765rc starts to switch and when the vcc reaches 12v, it stops switching. during the switching periods, the fs8s0765rc has the switching frequency of 40 khz and the constant peak mos- fet current of 0.6a. figure 9 shows operating waveforms. the soft start during the initial start-up is shown in the sec- tion 1. during this period, there is no external sync signal and the switching frequency is 20khz. the section 2 repre- sents the normal mode operation. the switching frequency is synchronized with the external sync signal. in the section 3, the external sync signal is removed, but the load exists and thus the vfb is higher than 0.8v. in this period the fs8s0765rc does the normal switching operation with the switching frequency of 20khz. the section 4 and 5 show the burst mode operation. at the end of the section 3, the load is also eliminated and at the beginning of the section 4, the vfb drops down below 0.8v and the fs8s0765rc stops switch- ing. during the section 4, the vcc goes down to 11v. when the external sync signal appears at the pin 5, the fs8s0765rc recovers its normal operation. time v v 15v 9v vcc vds v 5v 3v vsync v 0.8v vfb 12v 11v section i section 2 section 3 section 4 section 5 section 6 22v
fs8s0765rc 14 typical application circuit 1. 80w universal input power supply for crt monitor 2. transformer schematic diagram r104 470 external sync l203 l205 c302 4.7nf + c204 47uf/100v l204 c104 4.7nf c107 47nf/630v d203 uf5402 d202 uf5404 d201 uf4007 r101 68k/2w c102 100nf 14.5v/600ma r103 390k + c209 1000uf/16v ic101 fs8s0765rc 4 3 2 1 5 vfb vcc gnd drain s/s + c106 220uf/400v 80v/250ma 6.5v/500ma c103 4.7nf 55v/700ma + c210 1000uf/16v + c203 47uf/100v rt101 -12v/300ma + c108 22uf/50v f101 fuse line filter: lf101 l202 0 l201 + c201 22uf/160v + c205 1000uf/25v d101 uf4007 c105 100nf c301 4.7nf d205 uf5401 + c206 1000uf/25v + c207 1000uf/25v c101 tnr 0 + c202 22uf/160v c109 47nf t1 14 15 16 4 3 2 1 12 10 11 6 7 13 9 r102 15 -+ bd101 1 2 3 4 d204 uf5402 + c208 1000uf/25v d102 tvr10g + c110 1uf/50v lm : 420uh 1 4 6 7 16 np : 40t nvcc : 9t nvo1 : 10t 15 14 13 12 11 10 9 nvo2 : 22t nvo3 : 6t nvo4 : 5t nvo5 : 3t
fs8s0765rc 15 3.winding specification 4.electrical charateristics 5. core & bobbin core : eer 3540 bobbin : eer3540 ae(mm2) : 107 no pin (s f) wire turns winding method np1 4 10.3 1 40 solenoid winding insulation: polyester tape t = 0.050mm, 2layers nvo1 16 15 0.3 1 10 center winding insulation: polyester tape t = 0.050mm, 2layers nvcc 6 70.2 1 9 solenoid winding insulation: polyester tape t = 0.050mm, 2layers nvo2 14 13 0.3 3 22 center winding insulation: polyester tape t = 0.050mm, 2layers np2 4 10.3 1 40 solenoid winding insulation: polyester tape t = 0.050mm, 2layers nvo3 12 90.3 2 6 solenoid winding insulation: polyester tape t = 0.050mm, 2layers nvo4 9 11 0.3 1 5 solenoid winding insulation: polyester tape t = 0.050mm, 2layers nvo3 10 90.3 2 3 solenoid winding outer insulation: polyester tape t = 0.050mm, 2layers pin specification remarks inductance 1 - 4 420uh 10% 300khz, 1v leakage inductance 1 - 4 5uh max 2 nd all short
fs8s0765rc 16 6.demo circuit part list part value note part value note fuse c201 22nf/160v electorlytic capacitor f101 3a/250v c202 22nf/160v electorlytic capacitor ntc c203 47nf/100v electorlytic capacitor rt101 10d-9 c204 47nf/100v electorlytic capacitor resistor c205 1000nf/25v electorlytic capacitor r101 68k 2w c206 1000nf/25v electorlytic capacitor r102 15 1/4w c207 1000nf/25v electorlytic capacitor r103 390k 1w c208 1000nf/25v electorlytic capacitor r104 470 1/4w c209 1000nf/25v electorlytic capacitor c210 1000nf/25v electorlytic capacitor c301 4.7nf ac filter capacitor c302 4.7nf ac filter capacitor inductor l201 ~ l205 13uh diode d101 uf4007 capacitor d102 tvr10g c101 471d10 tnr d201 uf4007 c102 100nf box capacitor d202 uf5404 c103 4.7nf ac filter capacitor d203 uf5402 c104 4.7nf ac filter capacitor d204 uf5402 c105 100nf box capacitor d205 uf5401 c106 220nf/400v electorlytic capacitor c107 47nf/630v caramic capacitor bd101 kbl406 bridge diode c108 22nf/50v caramic capacitor line filter c109 47nf caramic capacitor lf101 24mh c110 1nf/50v electorlytic capacitor ic ic101 fs8s0765rc (7a, 650v)
fs8s0765rc 17 package dimensions to-220-5l
fs8s0765rc 18 package dimensions (continued) to-220-5l(forming)
fs8s0765rc 9/26/02 0.0m 001 stock#dsxxxxxxxx ? 2002 fairchild semiconductor corporation life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. ordering information tu : non forming type ydtu : forming type product number package marking code bvdss rds(on)max. fs8s0765rctu to-220-5l 8s0765rc 650v 1.6 FS8S0765RCYDTU to-220-5l(forming)

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