www.fairchildsemi.com FAN7527B Power Factor Correction Controller Features Description * Internal start-up timer * Internal R/C filter eliminates the need for an external R/C filter * Very precise adjustable output over voltage protection * Zero current detector * One quadrant multiplier * Trimmed 1.5% internal band gap reference * Under voltage lockout with 3V of hysteresis * Totem pole output with high state clamp * Low start-up and operating current * 8-Pin DIP or 8-Pin SOP The FAN7527B provides simple and high performance active power factor correction. The FAN7527B is optimized for electronic ballasts and low power and high density power supplies which require minimum board size, reduced external components and low power dissipation. Because the R/C filter is included in the current sense block, the external R/C filter is not necessary. Special circuitry has also been added to prevent no load runaway conditions. Regardless of the supply voltage, the output drive clamping circuit limits the overshoot of the power MOSFET gate drive. It greatly enhances the system reliability. Applications 8-DIP * Electronic ballast * SMPS 1 8-SOP 1 Rev 1.0.2 (c)2003 Fairchild Semiconductor Corporation FAN7527B Internal Block Diagram Vcc 8 2.5V Ref + - 11.5V Vcc Internal Bias UVLO 8.5V 7 OUT Drive Output Timer R Idet + - 5 7.2V 2V 1.5V Q Zero Current Detector Static OVP 40k CS S 4 8pF + - + - R Current Sense Comparator 2.25V Vref Veao(L)=2.25V 1.8V Vmo MULT 3 Vm1 - 0 ~ 3.8V Vm2 Multiplier Vref~Vref+2.5V OVP Current Detector Vmo K= Vm1 (Vm2 - Vref ) 2 0.25V + 6 2 GND EA_OUT Isovp=30uA Idovp=40uA + - Vref Vea(-) Error Amp 1 INV FAN7527B PIN Description INV 1 8 Vcc EA_OUT 2 7 OUT MULT 3 6 GND CS 4 5 ldet (Top View) Pin Number Pin Name Pin Function Description 1 INV Inverting input of the error amplifier. the output of the boost converter should be resistively divided to 2.5V and connected to this pin. 2 EA_OUT The output of the error amplifier. a feedback compensation network is placed between this pin and the INV pin. 3 MULT 4 CS Input of the PWM comparator. the MOSFET current is sensed by a resistor and the resulting voltage is applied to this pin. an internal R/C filter is included to reject any high frequency noise. 5 ldet Zero current detection input. 6 GND The ground potential of all the pins. 7 OUT Gate driver output. the push pull output stage is able to drive the power MOSFET with peak current of 500mA. 8 Vcc Supply voltage of driver and control circuits. Input to the multiplier stage. the full-wave rectified ac voltage is divided to less than 2V and is connected to this pin. 3 FAN7527B Absolute Maximum Ratings (Ta=25C) Characteristics Symbol Value Unit VCC 30 V Peak drive output current IOH,IOL 500 mA Driver output clamping diodes Vo > Vcc or Vo < -0.3V Supply voltage lclamp 10 mA Detector clamping diodes ldet 10 mA Error amp, multiplier and comparator input voltages Vin -0.3 to 6 V Operating junction temperature Tj 150 C Topr -25 to 125 C Tstg -65 to 150 C Operating temperature range Storage temperature range 8-DIP Power dissipation 1.1 Pd 8-SOP W 0.8 Thermal Data Characteristics Thermal resistance junction-ambient Max. Symbol 8-DIP Value 110 Rja 8-SOP Unit C/W 150 Temperature Characteristics (-25C Ta 125C) Characteristics 4 Symbol Min. Typ. Max. Unit Temperature stability for reference voltage (Vref) Vref - 20 - mV Temperature stability for multiplier gain (K) K/T - -0.2 - %/C FAN7527B Electrical Characteristics VCC= 14V, -25C Ta 125C, unless otherwise stated. Characteristics Symbol Test Condition Min. Typ. Max. Unit 10.5 11.5 12.5 V 2 3 4 V 10 60 100 uA < UNDER VOLTAGE LOCKOUT SECTION> Start threshold voltage Vth(st) UVLO hysteresis HY(st) Vcc Increasing - < SUPPLY CURRENT SECTION > Start-up supply current Ist Vcc = Vth(st) -0.2V Operating supply current Icc Output not switching - 3 6 mA Operating current at OVP Icc(ovp) Vinv = 3V - 1.7 4 mA 50kHz, CI = 1nF - 4 8 mA Iref = 0mA, Ta = 25C 2.465 2.5 2.535 V -25 Ta 125C 2.44 2.5 2.56 V Dynamic operating supply current Idcc < ERROR AMPLIFIER SECTION > Voltage feedback input threshold Vref Line regulation Vref1 14V Vcc 25V - 0.1 10 mV Temperature stability of Vref (Note1) Vref3 -25 Ta 125C - 20 - mV Input bias current Ib(ea) -0.5 - 0.5 uA Output source current Isource Vm2 = 4V -2 -4 - mA Isink Vm2 = 4V 2 4 - mA Output sink current - Output upper clamp voltage (Note2) Veao(H) Isource = 0.1mA - 6 - V Output lower clamp voltage (Note3) Veao(L) Isink = 0.1mA - 2.25 - V Large signal open loop gain (Note4) Gv Power supply rejection ratio (Note5) PSRR Unity gain bandwidth (Note6) GBW SR Slew rate (Note7) - 60 80 - dB 60 80 - dB - - 1 - MHz - - 0.6 - V/us 14V Vcc 25V < MULTIPLIER SECTION> Input bias current (pin3) Ib(m) - -0.5 - 0.5 uA M1 input voltage range (pin3) Vm1 - 0 - 3.8 V M2 input voltage range (pin2) Vm2 - Vref - Vref+2.5 V 0.36 0.44 0.52 1/V 1.65 1.8 1.95 V - -0.2 - %/C Multiplier gain (Note8) Maximum multiplier output voltage Temperature stability of K (Note9) K Vm1 = 1V, Vm2 = 3.5V Vomax(m) Vinv =0V, Vm1 = 4V K/T -25 Ta 125C 5 FAN7527B Electrical Characteristics (Continued) VCC= 14V, -25C Ta 125C, unless otherwise stated. Characteristics Symbol Test Condition Min. Typ. Max. Unit < CURRENT SENSE SECTION> Input offset voltage (Note8) Vio(cs) Vm1=0V , Vm2 = 2.2V -10 3 10 mV Input bias current Ib(cs) 0V Vcs 1.7V -1 -0.1 1 uA Current sense delay to output (Note11) td(cs) - 200 500 ns 1.7 2 2.3 V - 0.2 0.5 0.8 V Idet = -100uA 0.45 0.75 1 V 6.5 7.2 7.9 V -1 -0.1 1 uA - - 3 mA 10.5 11 - V - < ZERO CURRENT DETECT SECTION > Input voltage threshold Vth(det) Detect hysteresis HY(det) Vdet increasing Input low clamp voltage Vclamp(I) Input high clamp voltage Vclamp(h) Idet = 3mA Input bias current Ib(det) 1V Vdet 5V Input high/low clamp diode current (Note12) Iclamp(d) - < OUTPUT SECTION > Output voltage high Voh Output voltage low VoI Io = -10mA Io = 10mA - 0.8 1 V Rising time (Note13) tr CI = 1nF - 130 200 ns Falling time (Note14) tf CI = 1nF - 50 120 ns Maximum output voltage Vomax(o) Vcc = 20V, Io = 100uA 12 14 16 V Output voltage with UVLO activated Vomin(o) Vcc = 5V , Io = 100uA - - 1 V td(rst) Vm1 = 1V, Vm2 = 3.5V - 150 - us < RESTART TIMER SECTION> Restart time delay <OVER VOLTAGE PROTECTION SECTION> Soft OVP detecting current Isovp - 25 30 35 uA Dynamic OVP detecting current Idovp - 35 40 45 uA Static OVP threshold voltage Vovp 2.1 2.25 2.4 V Vinv = 2.7V Note 1 ~ 14: These parameters, although guaranteed, are not 100% tested in production. Pin4_Threshold Multiplier Gain: K = ------------------------------------------------------- ...... ( Vm1 = Vpin3,Vm2 = Vpin2 ) Vm1 x ( Vm2 - Vref ) 6 FAN7527B Typical Performance Characteristics Fig.2 Multiplier Input Voltage vs. C.S. Threshold Fig.1 E.A. Output Voltage vs. C.S. Threshold 2.0 2.0 Vm1=3.0V Vm1=2.5V Vm1=2.0V CS Threshold Voltage(V) Vm1=1.5V 1.5 C.S. Threshold Voltage(V) CS Threshold C.S Threshold Voltage(V) Voltage(V) Veao=4.25V Veao=4.0V Veao=3.75V 1.8 Vm1=3.5V Vm1=4.0V Vm1=1.0V 1.0 Vm1=0.5V 0.5 1.6 Veao=4.5V Veao=3.5V Veao=3.25V 1.4 1.2 Veao=3.0V 1.0 0.8 Veao=2.75V 0.6 0.4 Veao=2.5V 0.2 Vm1=0V 0.0 0.0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 1 EA Output Voltage(V) 2 3 4 5 Multiplier Input Voltage(V) Figure 2. Multiplier Input Voltage vs Current Sensing Threshold Figure 1. Error Amplifier Output Voltage vs Current Sensing Threshold Fig.4 Reference Voltage vs. Temperature Fig.3 Supply Current vs. Supply Voltage 2.7 0.015 0.012 Reference Voltage(V) Supply Current(A) 2.6 0.009 0.006 2.5 2.4 0.003 2.3 0.000 0 10 20 30 40 -25 50 0 25 50 75 100 125 Temperature () Supply Voltage(V) Figure 4. Reference Voltage vs Temperature Figure 3. Supply Current vs Supply Voltage Fig.6 UV Lockout Hysteresis vs. Temperature Fig.5 Start-up Threshold vs. Temperature 5 14 4 UV Lockout Hyteresis(V) Startup Threshold(V) 12 10 8 6 4 3 2 1 2 0 0 -25 0 25 50 75 100 Temperature () Figure 5. Start-Up Threshold vs Temperature 7 125 -25 0 25 50 75 100 Temperature () Figure 6. UV Lockout Hysteresis vs Temperature 125 FAN7527B Typical Performance Characteristics (Continued) Fig.7 Start-up Supply Current vs. Temperature Fig.8 E.A. Source CurrenT vs. Temperature 100 0 90 -1 EA Source Current(mA) Start-up Supply Current(uA) 80 70 60 50 40 30 20 -2 -3 -4 10 0 -5 -25 0 25 50 75 100 125 -25 0 25 Temperature () 50 75 100 125 100 125 Temperature () Figure 8. Error Amplifier Source Current vs Temperature Figure 7. Start-Up Supply Current vs Temperature Fig.10 E.A. Input Bias Current vs. Temperature Fig.9 E.A. Sink Current vs. Temperature 0.5 5 0.4 0.3 EA Input Bias Current(uA) EA Sink Current(mA) 4 3 2 1 0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 -0.5 0 -25 0 25 50 75 100 -25 125 0 25 Fig.12 Idet Threshold Voltage vs. Temperature Fig.11 Multiplier Gain vs. Temperature 1.0 4.0 0.8 3.2 Idet Threshold Voltage(V) Multiplier Gain(1/V) 75 Figure 10. Error Amplifier Input Bias Current vs Temperature Figure 9. Error Amplifier Sink Current vs Temperature 0.6 0.4 0.2 0.0 2.4 1.6 0.8 0.0 -25 0 25 50 75 100 Temperature () Figure 11. Multiplier Gain vs Temperature 8 50 Temperature () Temperature () 125 -25 0 25 50 75 100 Temperature () Figure 12. ldet Threshold Voltage vs Temperature 125 FAN7527B Typical Performance Characteristics (Continued) Fig.13 Idet Input Hysteresis vs. Temperature 1.0 500 450 400 350 Restart Time(us) Idet Input Hysteresis(mV) 0.8 0.6 0.4 0.2 300 250 200 150 100 50 0.0 -25 0 25 50 75 100 125 0 -25 0 25 Temperature () Figure 13. ldet Input Hysteresis vs Temperature 75 100 125 Figure 14. Restart Time vs Temperature Fig.15 Max. Mult. Output Voltage vs. temperature Fig.16 Supply Current vs. Temperature 2.0 5 1.6 4 Supply Current(mA) Maximum Mult. Output Voltage(V) 50 Temperature() 1.2 0.8 3 2 1 0.4 0 0.0 -25 0 25 50 75 100 Temperature () Figure 15. Max.Mult.Output Voltage vs Temperature 125 -25 0 25 50 75 100 125 Temperature () Figure 16. Supply Current vs Temperature 9 FAN7527B Mechanical Dimensions Package Dimensions in millimeters #5 1.524 0.10 0.060 0.004 #4 0.018 0.004 #8 2.54 0.100 9.60 MAX 0.378 #1 9.20 0.20 0.362 0.008 ( 6.40 0.20 0.252 0.008 0.46 0.10 0.79 ) 0.031 8-DIP 5.08 MAX 0.200 7.62 0.300 3.40 0.20 0.134 0.008 +0.10 0.25 -0.05 +0.004 0~15 10 0.010 -0.002 3.30 0.30 0.130 0.012 0.33 MIN 0.013 FAN7527B Mechanical Dimensions (Continued) Package Dimensions in millimeters 8-SOP Symbol Min Nom Max A - - 1.75 A1 0.10 0.15 0.25 A2 1.25 1.45 1.50 B 0.35 0.37 0.51 C 0.19 0.20 0.25 D 4.80 4.90 5.00 E 3.80 3.90 4.00 e 1.27BSC H 5.79 5.99 6.20 h 0.25 - 0.50 L 0.50 0.70 0.90 GP 0.36 BSC q 0 - 8 aaa - - 0.25 bbb - - 0.10 11 FAN7527B Ordering Information Product Number Package FAN7527BN 8-DIP FAN7527BM 8-SOP Operating Temperature -25 ~ +125oC 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. 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 8/16/03 0.0m 001 Stock#DSxxxxxxxx 2003 Fairchild Semiconductor Corporation