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april 2007 FAN7529 critical conduct ion mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 FAN7529 critical conduction mode pfc controller features ? low total harmonic distortion (thd) ? precise adjustable output over-voltage protection ? open-feedback protection and disable function ? zero current detector ? 150s internal start-up timer ? mosfet over-current protection ? under-voltage lockout with 3.5v hysteresis ? low start-up (40a) and operating current (1.5ma) ? totem pole output with high state clamp ? + 500/-800ma peak gate drive current ? 8-pin dip or 8-pin sop applications ? adapter ? ballast ? lcd tv, crt tv ? smps related application notes ? an-6026 - design of power fact or correction circuit using FAN7529 description the FAN7529 is an active power factor correction (pfc) controller for boost pfc applications that operates in crit- ical conduction mode (crm). it uses the voltage mode pwm that compares an internal ramp signal with the error amplifier output to generate mosfet turn-off sig- nal. because the voltage-mode crm pfc controller does not need rectified ac line voltage information, it saves the power loss of the input voltage sensing network neces- sary for the current-mode crm pfc controller. FAN7529 provides many protection functions, such as over-voltage protection, open-feedback protection, over- current protection, and unde r-voltage lockout protection. the FAN7529 can be disabled if the inv pin voltage is lower than 0.45v and the operating current decreases to 65a. using a new variable on-time control method, thd is lower than the conventional crm boost pfc ics. ordering information part number operating temp. range pb-free package packing method marking code FAN7529n -40c to +125c yes 8-dip rail FAN7529 FAN7529m -40c to +125c yes 8-sop rail FAN7529 FAN7529mx -40c to +125c yes 8-sop tape & reel FAN7529
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 2 typical applicati on diagrams figure 1. typical boost pfc application internal block diagram figure 2. functional block diagram of FAN7529 gnd zcd inv v cc ac in v o comp FAN7529 cs mot r1 r2 ld c o n aux v aux r zcd FAN7529 rev. 00 inv error amplifier v ref1 ovp comp 8pf 40k 2.5v ref internal bias timer v cc zcd cs uvlo 6.7v 12v 8.5v 2.675v 2.5v current protection comparator 1v offset mot gnd saw tooth generator zero current detector r s q 3 6 4 5 2 1 8 v ref1 gm 0.8v disable 0.45v 0.35v disable 1.5v 1.4v 7 v cc out drive output ramp signal 1v~5v range 2.9v FAN7529 rev. 00
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 3 pin assignments figure 3. pin configuration (top view) pin definitions pin # name description 1inv this pin is the inverting input of the error am plifier. the output voltage of the boost pfc converter should be resistively divided to 2.5v. 2comp this pin is the output of the transconductance error amplifier. components for output voltage compensation should be connected between this pin and gnd. 3mot this pin is used to set the slope of the internal ramp. the voltage of this pin is main- tained at 2.9v. if a resistor is connected between this pin and gnd, current flows out of the pin and the slope of the internal ramp is proportional to this current. 4cs this pin is the input of the over-current protection comparator. the mosfet current is sensed using a sensing resistor and the resulting voltage is applied to this pin. an internal rc filter is included to filter switching noise. 5zcd this pin is the input of the zero current de tection block. if the voltage of this pin goes higher than 1.5v, then goes lower than 1.4v, the mosfet is turned on. 6gnd this pin is used for the ground potential of al l the pins. for proper operation, the signal ground and the power ground should be separated. 7out this pin is the gate drive output. the peak sourcing and sinking current levels are +500ma and -800ma respectively. for proper operation, the stray inductance in the gate driving path must be minimized. 8v cc this pin is the ic supply pin. ic current and mosfet drive current are supplied using this pin. FAN7529 6 5 8 7 v cc out gnd zcd 1 2 3 4 comp cs mot inv yww FAN7529 rev. 00
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 4 absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be opera- ble above the recommended operating conditions and stressing the parts to these levels is not recommended. in addi- tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. t a = 25c unless otherwise specified. thermal impedance (1) note: 1. regarding the test environment and pcb type, please refer to jesd51-2 and jesd51-10. symbol parameter value unit v cc supply voltage v z v i oh , i ol peak drive output current +500/-800 ma i clamp driver output clamping diodes v o >v cc or v o <-0.3v 10 ma i det detector clamping diodes 10 ma v in error amplifier, mot, cs input voltages -0.3 to 6 v t j operating junction temperature 150 c t a operating temperature range -40 to 125 c t stg storage temperature range -65 to 150 c v esd_hbm esd capability, human body model 2.0 kv v esd_mm esd capability, machine model 300 v v esd_cdm esd capability, charged device model 500 v symbol parameter value unit j thermal resistance, junction-to-ambient 8-dip 110 c/w 8-sop 150 c/w
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 5 electrical characteristics v cc = 14v and t a = -40c~125c unless otherwise specified. note: 2. these parameters, although guaranteed by design, are not tested in production. symbol parameter condition min. typ. max. unit under-voltage lockout section v th(start) start threshold voltage v cc increasing 11 12 13 v v th(stop) stop threshold voltage v cc decreasing 7.5 8.5 9.5 v hy (uvlo) uvlo hysteresis 3.0 3.5 4.0 v v z zener voltage i cc = 20ma 20 22 24 v supply current section i st start-up supply current v cc = v th(start) - 0.2v 40 70 a i cc operating supply current output no switching 1.5 3.0 ma i dcc dynamic operating supply current 50khz, cl=1nf 2.5 4.0 ma i cc(dis) operating current at disable v inv = 0v 20 65 95 a error amplifier section v ref1 voltage feedback input threshold1 t a = 25 c 2.465 2.500 2.535 v v ref1 line regulation v cc = 14v ~ 20v 0.1 10.0 mv v ref2 temperature stability of v ref1 (2) 20 mv i b(ea) input bias current v inv = 1v ~ 4v -0.5 0.5 a i source output source current v inv = v ref1 - 0.1v -12 a i sink output sink current v inv = v ref1 + 0.1v 12 a v eao(h) output upper clamp voltage v inv = v ref1 - 0.1v 5.4 6.0 6.6 v v eao(z) zero duty cycle output voltage 0.9 1.0 1.1 v g m transconductance (2) 90 115 140 mho maximum on-time section v mot maximum on-time voltage r mot = 40.5k 2.784 2.900 3.016 v t on(max) maximum on-time programming r mot = 40.5k , t a = 25 c192429s current sense section v cs(limit) current sense input threshold voltage limit 0.7 0.8 0.9 v i b(cs) input bias current v cs = 0v ~ 1v -1.0 -0.1 1.0 a t d(cs) current sense delay to output (2) dv/dt = 1v/100ns, from 0v to 5v 350 500 ns
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 6 electrical characteristics (continued) v cc = 14v and t a = -40 c~125 c unless otherwise specified. note: 3. these parameters, although guaranteed by design, are not tested in production. symbol parameter condition min. typ. max. unit zero current detect section v th(zcd) input voltage threshold (3) 1.35 1.50 1.65 v hy (zcd) detect hysteresis (3) 0.05 0.10 0.15 v v clamp(h) input high clamp voltage i det = 3ma 6.0 6.7 7.4 v v clamp(l) input low clamp voltage i det = -3ma 0 0.65 1.00 v i b(zcd) input bias current v zcd = 1v ~ 5v -1.0 -0.1 1.0 a i source(zcd) source current capability (3) t a = 25 c-10ma i sink(zcd) sink current capability (3) t a = 25 c10ma t dead maximum delay from zcd to output turn-on (3) dv/dt = -1v/100ns, from 5v to 0v 100 200 ns output section v oh output voltage high i o = -100ma, t a = 25 c 9.2 11.0 12.8 v v ol output voltage low i o = 200ma, t a = 25 c1.02.5v t r rising time (3) cl = 1nf 50 100 ns t f falling time (3) cl = 1nf 50 100 ns v o(max) maximum output voltage v cc = 20v, i o = 100 a 11.5 13.0 14.5 v v o(uvlo) output voltage with uvlo activated v cc = 5v, i o = 100 a1v restart timer section t d(rst) restart timer delay 50 150 300 s over-voltage protection section v ovp ovp threshold voltage t a = 25 c 2.620 2.675 2.730 v hy (ovp) ovp hysteresis t a = 25 c 0.120 0.175 0.230 v enable section v th(en) enable threshold voltage 0.40 0.45 0.50 v hy (en) enable hysteresis 0.05 0.10 0.15 v
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 7 typical characteristics figure 4. start threshold voltage vs. temp. figure 5. stop threshold voltage vs. temp. figure 6. uvlo hysteresis vs. temp . figure 7. zener voltage vs. temp. figure 8. start-up supply current vs. temp. f igure 9. operating supply current vs. temp. -60 -40 -20 0 20 40 60 80 100 120 140 11.0 11.5 12.0 12.5 13.0 v th(start) [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 7.5 8.0 8.5 9.0 9.5 v th(stop) [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 3.00 3.25 3.50 3.75 4.00 hy (uvlo) [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 21.0 21.5 22.0 22.5 23.0 v z [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 15 30 45 60 i st [ a] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 0.0 0.8 1.6 2.4 i cc [ma] temperature [c]
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 8 typical characteristics (continued) figure 10. dynamic operating supply current vs. temp. figure 11. operating current at disable vs. temp. figure 12. v ref1 vs. temp. figure 13. v ref1 vs. temp. figure 14. input bias current vs. temp. figure 15. output source current vs. temp. -60 -40 -20 0 20 40 60 80 100 120 140 0 1 2 3 4 i dcc [ma] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 36 54 72 90 i cc(dis) [ a] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 2.48 2.50 2.52 v ref1 [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 0.0 2.5 5.0 7.5 10.0 v ref1 [mv] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 -0.50 -0.25 0.00 0.25 0.50 i b(ea) [ a] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 -18 -15 -12 -9 i source [ a] temperature [c]
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 9 typical characteristics (continued) figure 16. output sink current vs. temp. fig ure 17. output upper clamp voltage vs. temp. figure 18. zero duty cycle output voltage vs. temp. figure 19. maximum on-time voltage vs. temp. figure 20. maximum on-time vs. temp. figure 21. current sense input threshold voltage vs. temp. -60 -40 -20 0 20 40 60 80 100 120 140 6 9 12 15 18 i sink [ a] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 5.4 5.7 6.0 6.3 6.6 v eao (h) [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 0.90 0.95 1.00 1.05 1.10 v eao(z) [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 2.80 2.85 2.90 2.95 3.00 v mot [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 21 24 27 t on(max) [ s] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 0.70 0.75 0.80 0.85 0.90 v cs(limit) [v] temperature [c]
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 10 typical characteristics (continued) figure 22. input bias current vs. temp. figure 23. input high clamp voltage vs. temp. figure 24. input low clamp voltage vs. temp. figure 25. input bias current vs. temp. figure 26. maximum output voltage vs. temp. figur e 27. output voltage with uvlo activated vs. temp. -60 -40 -20 0 20 40 60 80 100 120 140 -1.0 -0.5 0.0 0.5 1.0 i b(cs) [ a] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 6.0 6.4 6.8 7.2 v clamp(h) [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 0.00 0.25 0.50 0.75 1.00 v clamp(l) [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 -1.0 -0.5 0.0 0.5 1.0 i b(zcd) [ a] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 12 13 14 v o(max) [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 -0.3 0.0 0.3 0.6 0.9 v o(uvlo) [v] temperature [c]
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 11 typical characteristics (continued) figure 28. restart delay time vs. temp. figure 29. ovp threshold voltage vs. temp. figure 30. ovp hysteresis vs. temp. figure 31. enable threshold voltage vs. temp. figure 32. enable hysteresis vs. temp. -60 -40 -20 0 20 40 60 80 100 120 140 50 100 150 200 250 300 t d(rst) [ s] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 2.64 2.67 2.70 2.73 v ovp [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 0.12 0.15 0.18 0.21 hy (ovp) [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 0.400 0.425 0.450 0.475 0.500 v th(en) [v] temperature [c] -60 -40 -20 0 20 40 60 80 100 120 140 0.050 0.075 0.100 0.125 0.150 hy (en) [v] temperature [c]
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 12 applications information 1. error amplifier block the error amplifier block consists of a transconductance amplifier, output ovp comparator, and disable compara- tor. for the output voltage control, a transconductance amplifier is used instead of the conventional voltage amplifier. the transconductance amplifier (voltage con- trolled current source) aids the implementation of ovp and disable function. the out put current of the amplifier changes according to the volt age difference of the invert- ing and non-inverting input of the amplifier. the output voltage of the amplifier is compared with the internal ramp signal to generate the switch turn-off signal. the ovp comparator shuts down the output drive block when the voltage of the inv pin is higher than 2.675v and there is 0.175v hysteresis. the disable comparator dis- ables the operation of the FAN7529 when the voltage of the inverting input is lower than 0.45v and there is 100mv hysteresis. an external small signal mosfet can be used to disable the ic, as shown in figure 33. the ic operating current decreases below 65a to reduce power consumption if the ic is disabled. figure 33. error amplifier block 2. zero current detection block the zero current detector (zcd) generates the turn-on signal of the mosfet when the boost inductor current reaches zero using an auxiliary winding coupled with the inductor. if the voltage of the zcd pin goes higher than 1.5v, the zcd comparator waits until the voltage goes below 1.4v. if the voltage goes below 1.4v, the zero cur- rent detector turns on the mosfet. the zcd pin is pro- tected internally by two clamps, 6.7v-high clamp and 0.65v-low clamp. the 150s timer generates a mosfet turn-on signal if the drive output has been low for more than 150s from the falling edge of the drive output. figure 34. zero current detector block 3. sawtooth generator block the output of the error amp lifier and the output of the sawtooth generator are compared to determine the mosfet turn-off instance. the slope of the sawtooth is determined by an external resistor connected to the mot pin. the voltage of the mot pin is 2.9v and the slope is proportional to the current flowing out of the mot pin. the internal ramp signal has a 1v offset; there- fore, the drive output is shut down if the voltage of the comp pin is lower than 1v. the mosfet on-time is maximum when the comp pin voltage is 5v. according to the slope of the internal ramp, the maximum on-time can be programmed. the necessary maximum on-time depends on the boost inductor, lowest ac line voltage, and maximum output power. the resistor value should be designed properly. figure 35. sawtooth generator block inv error amp ovp comp 2.675v 2.5v 2 1 gm 0.45v 0.35v disable v out v ref1 (2.5v) disable signal FAN7529 rev. 00 timer zcd 6.7v zero current detector r s q 5 1.5v 1.4v v in r zcd 150 s turn-on signal FAN7529 rev. 00 1v offset mot 3 error amp output off signal 2.9v saw tooth generator FAN7529 rev. 00
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 13 4. over-current protection block the mosfet current is sens ed using an external sens- ing resistor for the over-current protection. if the cs pin voltage is higher than 0.8v, the over-current protection comparator generates a protec tion signal. an internal rc filter is included to f ilter switching noise. figure 36. over-current protection block 5. switch drive block the FAN7529 contains a single totem-pole output stage designed for direct drive of the power mosfet. the drive output is capable of up to +500/-800ma peak cur- rent with a typical rise and fall time of 50ns with 1nf load. the output voltage is clamped to 13v to protect the mosfet gate if the v cc voltage is higher than 13v. 6. under-voltage lockout block if the v cc voltage reaches 12v, the ic?s internal blocks are enabled and start operation. if the v cc voltage drops below 8.5v, most of the internal blocks are disabled to reduce the operating current. v cc voltage should be higher than 8.5v under normal conditions. 8pf 40k cs over current protection comparator 4 0.8v ocp signal FAN7529 rev. 00
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 14 typical application circuit features ? high efficiency (>90% at 85v ac input) ? low total harmonic distortion (thd) (<10% at 265v ac input, 25w load) key design notes ? r1, r2, r5, c11 should be optimized for best thd characteristic. 1. schematic figure 37. schematic application output power input voltage output voltage ballast 100w universal input (85~265v ac ) 400v f1 ac input 5 6 7 8 out v cc gnd zcd inv comp mot cs FAN7529 1234 v1 c1 c3 c4 lf1 c2 ntc bd c5 r1 c6 r3 r4 r5 t1 d1 c7 r7 r10 r6 r8 d2 r9 c8 q1 v aux r2 r11 c9 zd1 c10 pfc output c11 d3 FAN7529 rev. 00
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 15 2. inductor schematic diagram figure 38. inductor schematic diagram 3. winding specification 4. electrical characteristics 5. core & bobbin ? core: ei 3026 ? bobbin: ei3026 ? ae(mm 2 ): 111 no pin (s f) wire turns winding method np 5 30.1 30 58 solenoid winding insulation: polyester tape t = 0.050mm, 4 layers n vcc 2 40.2 1 8 solenoid winding outer insulation: polyester tape t = 0.050mm, 4 layers air gap: 0.6mm for each leg pin specification remarks inductance 3 - 5 600h 10% 100khz, 1v np 4 2 n vcc 5 3 FAN7529 rev. 00
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 16 6. demo circuit part list part value note part value note fuse inductor f1 3a/250v t1 600h ei3026 ntc ntc 10d-9 mosfet resistor q1 fqpf13n50c fairchild r1 56k 1/4w r2 820k 1/4w diode r3 330k 1/2w d1 1n4148 fairchild r4 150 1/2w d2 byv26c 600v, 1a r5 20k 1/4w d3 sb140 fairchild r6 10 1/4w zd1 1n4746 18v r7 0.2 1/2w r8 10k 1/4w r9 10k 1/4w bridge diode r10 2m 1/4w bd kbl06 600v/4a r11 12.6k 1/4w line filter capacitor lf1 40mh wire 0.4mm c1 150nf/275vac box capacitor c2 470nf/275vac box capacitor ic c3 2.2nf/3kv ceramic capacitor ic1 FAN7529 fairchild c4 2.2nf/3kv ceramic capacitor c5 tnr c6 47f/25v electrolytic capacitor v1 471 470v c7 47nf/50v ceramic capacitor c8 220nf/50v multilayer ceramic capacitor c9 100f/450v electrolytic capacitor c10 12nf/100v film capacitor c11 56pf/50v ceramic capacitor
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 17 7. layout figure 39. pcb layout considerations for FAN7529 8. performance data p out 85v ac 115v ac 230v ac 265v ac 100w pf 0.998 0.998 0.991 0.984 thd 5.1% 3.6% 5.2% 6.2% efficiency 90.9% 93.7% 95.6% 96% 75w pf 0.999 0.998 0.986 0.975 thd 4.1% 3.6% 5.0% 5.7% efficiency 91.6% 93.3% 94.6% 95.3% 50w pf 0.998 0.997 0.974 0.956 thd 4.4% 5.0% 5.7% 6.2% efficiency 91.3% 91.9% 92.7% 93.4% 25w pf 0.995 0.991 0.923 0.876 thd 7.9% 8.6% 8.3% 8.7% efficiency 86.4% 87.1% 87.3% 88.1% power ground signal ground separate the power ground and the signal ground place the output voltage sensing resistors close to ic
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 18 mechanical dimensions 8-dip dimensions are in millimeters (i nches) unless otherwise noted. . figure 40. 8-lead dual in-line package (dip) september 1999, rev b 6.40 0.20 3.30 0.30 0.130 0.012 3.40 0.20 0.134 0.008 #1 #4 #5 #8 0.252 0.008 9.20 0.20 0.79 2.54 0.100 0.031 () 0.46 0.10 0.018 0.004 0.060 0.004 1.524 0.10 0.362 0.008 9.60 0.378 max 5.08 0.200 0.33 0.013 7.62 0~15 0.300 max min 0.25 +0.10 ?0.05 0.010 +0.004 ?0.002 8dip_dim.pdf
FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 19 mechanical dimensions (continued) 8-sop dimensions are in millimeters (i nches) unless otherwise noted. figure 41. 8-lead small outline package (sop) september 2001, rev b1 sop8_dim.pdf 4.92 0.20 0.194 0.008 0.41 0.10 0.016 0.004 1.27 0.050 5.72 0.225 1.55 0.20 0.061 0.008 0.1~0.25 0.004~0.001 6.00 0.30 0.236 0.012 3.95 0.20 0.156 0.008 0.50 0.20 0.020 0.008 5.13 0.202 max #1 #4 #5 0~8 #8 0.56 0.022 () 1.80 0.071 max0.10 max0.004 max min + 0.10 -0.05 0.15 + 0.004 -0.002 0.006
trademarks the following are registered and unregistered trademarks fairchild semiconductor owns or is authorized to use and is not intend ed to be an exhaustive list of all such trademarks. acex ? across the board. around the world. activearray bottomless build it now coolfet crossvolt ctl? current transfer logic? dome e 2 cmos ecospark ? ensigna fact quiet series? fact ? fast ? fastr fps frfet ? globaloptoisolator gto hisec i-lo implieddisconnect intellimax isoplanar microcoupler micropak microwire motion-spm? msx msxpro ocx ocxpro optologic ? optoplanar ? pacman pdp-spm? pop power220 ? power247 ? poweredge powersaver power-spm powertrench ? programmable active droop qfet ? qs qt optoelectronics quiet series rapidconfigure rapidconnect scalarpump smart start spm ? stealth? superfet supersot -3 supersot -6 supersot -8 syncfet? tcm the power franchise ? ? tinyboost tinybuck tinylogic ? tinyopto tinypower tinywire trutranslation p serdes uhc ? unifet vcx wire 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. these specifications do not expand the terms of fairchild?s worldwide terms and conditions, specifically the warranty therein, which covers these products. 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 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. product status definitions definition of terms datasheet identification product status definition advance information formative or in design this datasheet contains the design specifications for product development. specifications may change in any manner without notice. preliminary first production this datasheet contains preliminary data; supplementary data will be published at a later date. fairchild semiconductor reserves the right to make changes at any time without notice to improve design. no identification needed full production this datasheet contains final specifications. fairchild semiconductor reserves the right to make changes at any time without notice to improve design. obsolete not in production this datasheet contains specifications on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only. rev. i26 FAN7529 critical conducti on mode pfc controller ? 2006 fairchild semiconductor corporation www.fairchildsemi.com FAN7529 rev. 1.0.2 20

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