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| www.fairchildsemi.com FAN7527 Power Factor Correction Controller Features * Internal Startup 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 Bandgap Reference * Under Voltage Lock Out with 3V of Hysteresis * Totem Pole Output with High State Clamp * Low Startup and Operating Current * 8-Pin DIP or 8-Pin SOP Description The FAN7527 provides simple and high performance active power factor correction. FAN7527 is optimized for electronic ballast and low power, high density power supplies which require minimum board area reduced component count and low power dissipation. Internal R/C filter eliminates the need for an external R/C filter. Internally clamping the error amplifier and multiplier outputs, improves turn on overshoot characteristics and current limiting. Special circuitry has also been added to prevent no load runaway conditions. Independent of supply voltage, the output drive clamping circuit limits overshoot of the power MOSFET gate drive. This greatly enhances the system reliability. 8-DIP Applications * Electronic Ballast * SMPS 1 8-SOP 1 Rev 1.0.3 (c)2001 Fairchild Semiconductor Corporation FAN7527 Internal Block Diagram Vcc 8 2.5V Ref Vcc + 12V 9V UVLO Internal Internal Bias Drive Output Timer R S 7 OUT Idet 5 6.5V 7.2V 2V 1.5V + Zero Current Detector Static OVP 40K Q CS 4 8pF + R + 2.25V Current Sense Comparator 1.8V Vref Veao(L) = 2.25V Vmo Vm1 + Vm2 Multiplier 0.25V - + Vref ~ Vref+2.5V Isovp=30uA Idovp=40uA Vref MULT 3 0 ~ 3.8V Vea(-) Error Amp 1 INV K= Vmo Vm1 * (Vm2-Vref) GND OVP Current Detector 6 GND 2 EA_OUT 2 FAN7527 PIN Description INV 1 2 3 4 (Top View) 8 7 6 5 Vcc OUT GND ldet EA_OUT MULT CS Pin Number 1 2 3 Pin Name INV EA_OUT MULT Pin Function Descrition Inverting input of the error amplifier. The output of the boost converter should be resistively divided to 2.5V and connected to this pin. The output of the error amplifier. A feedback conpensation network is placed between this pin and the INV pin. Input to the multiplier stage. The full-wave rectified AC is devided to less than 2V and is connected to this pin. Input to the PWM comparator. Current is sensed in the boost stage MOSFET by a resistor in the source lead. An internal leading edge blanking circuitry has been included to reject any high frequency noise present on the current waveform. The zero current detector senses the inductor current by monitoring when the boost inductor auxilary winding voltage falls below 1.8V. If it is connected to GND, the device is disabled. The ground potential of all the pins. Gate driver output . A push pull output stage is able to drive the Power MOSFET with peak current of 400mA. Supply voltage of driver and control circuits. 4 5 CS ldet 6 7 8 GND OUT Vcc 3 FAN7527 Absolute Maximum Ratings (Ta=25C) Characteristics Supply Voltage Peak Drive Output Current Driver Output Clamping Diodes Vo > Vcc or Vo < -0.3V Detector Clamping Diodes Error Amp, Multiplier And Comparator Input Voltages Operating Junction Temperature Operating Temperature Range Storage Temperature Range Power Dissipation Symbol VCC IOH,IOL lclamp ldet Vin Tj Topr Tstg Pd Value 30 500 10 10 -0.3 to 6 150 -25 to 125 -65 to 150 0.8 Unit V mA mA mA V C C C W Temperature Characteristics (-25C Ta 125C) Characteristics Temperature Stability for Reference Voltage (Vref) Temperature Stability for Multiplier Gain (K) Symbol Vref K/T Min. Typ. 20 0.2 Max. Unit mV %/C 4 FAN7527 Electrical Characteristics VCC= 14V, -25C Ta 125C, unless otherwise stated. Characteristics Start Threshold Voltage UVLO Hysteresis < SUPPLY CURRENT SECTION > Start-up Supply Current Operating Supply Current Operating Current at OVP Dynamic Operating Supply Current < ERROR AMPLIFIER SECTION > Voltage Feedback Input Threshold Line Regulation Temperature Stability Of Vref (Note1) Input Bias Current Output Source Current Output Sink Current Output Upper Clamp Voltage (Note2) Output Lower Clamp Voltage (Note3) Large Signal Open Loop Gain (Note4) Power Supply Rejection Ratio (Note5) Unity Gain Bandwith (Note6) Slew Rate (Note7) < MULTIPLIER SECTION> Input Bias Current (Pin3) M1 Input Voltage Range (Pin3) M2 Input Voltage Range (Pin2) Multiplier Gain (Note8) Maximum Multiplier Output Voltage Temperature Stability Of K (Note9) Ib(m) Vm1 Vm2 K K/T Vm1 = 1V, Vm2 = 3.5V -25 Ta 125C -0.5 0 Vref 0.36 1.65 0.44 1.8 -0.2 0.5 3.8 Vref+2.5 0.52 1.95 uA V V 1/V V %/C Vref Vref1 Vref3 Ib(ea) Isource Isink Veao(H) Veao(L) Gv PSRR GBW SR Vm2 = 4V Vm2 = 4V Isource = 0.1mA Isink = 0.1mA 14V Vcc 25V Iref =0mA, Ta =25C 0 Ta 125C 14V Vcc 25V -25 Ta 125C 2.465 2.44 -0.5 -2 2 60 60 2.5 2.5 0.1 20 -4 4 6 2.25 80 80 1 0.6 2.535 2.56 10 0.5 V V mV mV uA mA mA V V dB dB MHz V/us Ist Icc Icc(ovp) Idcc Vcc =Vth(st) -0.2V Output not switching Vinv = 3V 50KHz, CI = 1nF 20 60 3 1.7 4 100 6 4 8 uA mA mA mA Symbol Vth(st) HY(st) Test Condition Vcc Increasing - Min. 10.5 2 Typ. 11.5 3 Max. 12.5 4 Unit V V < UNDER VOLTAGE LOCK OUT SECTION> Vomax(m) Vinv =0V, Vm1 = 4V 5 FAN7527 Electrical Characteristics(Continued) VCC= 14V, -25C Ta 125C, unless otherwise stated. Characteristics < CURRENT SENSE SECTION> Input Offset Voltage (Note8) Input Bias Current Current Sense Delay To Output (Note11) < DETECT SECTION > Input Voltage Threshold Detect Hysteresis Input Low Clamp Voltage Input High Clamp Voltage Input Bias Current Input High/low Clamp Diode Current (Note12) < OUTPUT SECTION > Output Voltage High Output Voltage Low Rising Time (Note13) Falling Time (Note14) Maximum Output Voltage Output Voltage With UVLO Activated < RESTART TIMER SECTION> Restart Time Delay Soft OVP Detecting Current Dynamic OVP Detecting Current Static OVP Threshold Voltage Symbol Vio(cs) Ib(cs) tb(cs) Test Condition Vm1=0V , Vm2 = 2.2V 0V Vcs 1.7V - Min. -10 -1 - Typ. 3 -0.1 200 Max. 10 1 500 Unit mV uA ns Vth(det) HY(det) Vclamp(I) Ib(det) Iclamp(d) Vdet Increasing Idet = -100uA 1V Vdet 5V - 1.7 0.2 0.45 6.5 -1 - 2 0.5 0.75 7.2 -0.1 - 2.3 0.8 1 7.9 1 3 V V V V uA mA Vclamp(h) Idet = 3mA Voh VoI tr tf Vomax(o) Vomin(o) td(rst) Isovp Idovp Vovp Io = -10mA Io = 10mA CI = 1nF CI = 1nF Vcc = 20V, Io = 100uA Vcc = 5V , Io = 100uA Vm1 = 1V, Vm2 = 3.5V Vinv = 2.7V 10.5 12 25 35 2.1 11 0.8 130 50 14 500 30 40 2.25 1 200 120 16 1 35 45 2.4 V V ns ns V V us uA uA V 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 FAN7527 Typical Performance Characteristics Fig.1 E.A. Output Voltage vs. C.S. Threshold 2.0 Vm1=3.0V Vm1=2.5V Vm1=2.0V Vm1=3.5V Fig.2 Multiplier Input Voltage vs. C.S. Threshold 2.0 1.8 Veao=4.25V Veao=4.0V Veao=3.75V C.S. Threshold Voltage(V) C.S Threshold Voltage(V) 1.5 Vm1=4.0V Vm1=1.5V 1.6 1.4 1.2 Veao=4.5V Veao=3.5V Veao=3.25V Vm1=1.0V 1.0 Veao=3.0V 1.0 0.8 Veao=2.75V 0.6 0.4 0.2 Veao=2.5V Vm1=0.5V 0.5 Vm1=0V 0.0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0.0 0 1 2 3 4 5 EA Output Voltage(V) Multiplier Input Voltage(V) Figure 1. Error Amplifier Output Voltage vs Current Sensing Threshold Fig.3 Supply Current vs. Supply Voltage 0.015 Figure 2. Multiplier Input Voltage vs Current Sensing Threshold Fig.4 Reference Voltage vs. Temperature 2.7 0.012 0.009 Reference Voltage(V) 0 10 20 30 40 50 2.6 Supply Current(A) 2.5 0.006 2.4 0.003 0.000 2.3 -25 0 25 50 75 100 125 Supply Voltage(V) Temperature () Figure 3. Supply Current vs Supply Voltage Fig.5 Start-up Threshold vs. Temperature 14 12 10 8 6 4 2 0 -25 0 25 50 75 100 125 Figure 4. Reference Voltage vs Temperature Fig.6 UV Lockout Hysteresis vs. Temperature 5 4 UV Lockout Hyteresis(V) Startup Threshold(V) 3 2 1 0 -25 0 25 50 75 100 125 Temperature () Temperature () Figure 5. Start-Up Threshold vs Temperature Figure 6. UV Lockout Hysteresis vs Temperature 7 FAN7527 Typical Performance Characteristics (continued) Fig.7 Start-up Supply Current vs. Temperature 100 90 80 Fig.8 E.A. Source CurrenT vs. Temperature 0 Start-up Supply Current(uA) -1 70 60 50 40 30 20 10 0 -25 0 25 50 75 100 125 EA Source Current(mA) -2 -3 -4 -5 -25 0 25 50 75 100 125 Temperature () Temperature () Figure 7. Start-Up Supply Current vs Temperature Figure 8. Error Amplifier Source Current vs Temperature Fig.10 E.A. Input Bias Current vs. Temperature 0.5 0.4 Fig.9 E.A. Sink Current vs. Temperature 5 EA Input Bias Current(uA) 4 0.3 0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 EA Sink Current(mA) 3 2 1 0 -25 0 25 50 75 100 125 -0.5 -25 0 25 50 75 100 125 Temperature () Temperature () Figure 9. Error Amplifier Sink Current vs Temperature Fig.11 Multiplier Gain vs. Temperature 1.0 Figure 10. Error Amplifier Input Bias Current vs Temperature Fig.12 Idet Threshold Voltage vs. Temperature 4.0 0.6 Idet Threshold Voltage(V) -25 0 25 50 75 100 125 0.8 3.2 Multiplier Gain(1/V) 2.4 0.4 1.6 0.2 0.8 0.0 0.0 -25 0 25 50 75 100 125 Temperature () Temperature () Figure 11. Multiplier Gain vs Temperature Figure 12. ldet Threshold Voltage vs Temperature 8 FAN7527 Typical Performance Characteristics (continued) Fig.13 Idet Input Hysteresis vs. Temperature 1.0 Fig.14 Restart Time vs. Temperature 1000 900 0.8 Idet Input Hysteresis(mV) 800 700 0.6 Restart Time(uS) -25 0 25 50 75 100 125 600 500 400 300 200 100 0.4 0.2 0.0 0 -25 0 25 50 75 100 125 Temperature () Temperature () Figure 13. ldet Input Hysteresis vs Temperature Figure 14. Restart Time vs Temperature Fig.15 Max. Mult. Output Voltage vs. temperature 2.0 Fig.16 Supply Current vs. Temperature 5 Maximum Mult. Output Voltage(V) 1.6 4 Supply Current(mA) 1.2 3 0.8 2 0.4 1 0.0 -25 0 25 50 75 100 125 0 -25 0 25 50 75 100 125 Temperature () Temperature () Figure 15. Max.Mult.Output Voltage vs Temperature Figure 16. Supply Current vs Temperature 9 FAN7527 Mechanical Dimensions Package Dimensions in millimeters 8-DIP 1.524 0.10 0.018 0.004 0.060 0.004 0.46 0.10 6.40 0.20 0.252 0.008 ( #1 #8 9.20 0.20 0.362 0.008 9.60 MAX 0.378 #4 #5 2.54 0.100 5.08 MAX 0.200 7.62 0.300 3.40 0.20 0.134 0.008 3.30 0.30 0.130 0.012 0.33 MIN 0.013 0.79 ) 0.031 0.25 -0.05 0~15 +0.10 0.010 -0.002 +0.004 10 FAN7527 Mechanical Dimensions (Continued) Package Dimensions in millimeters 8-SOP MIN 1.55 0.20 0.061 0.008 0.1~0.25 0.004~0.001 #1 #8 4.92 0.20 0.194 0.008 5.13 MAX 0.202 ( #4 #5 6.00 0.30 0.236 0.012 +0.10 0.15 -0.05 +0.004 0.006 -0.002 0.56 ) 0.022 1.80 MAX 0.071 MAX0.10 MAX0.004 3.95 0.20 0.156 0.008 5.72 0.225 0.50 0.20 0.020 0.008 0~ 8 1.27 0.050 0.41 0.10 0.016 0.004 11 FAN7527 Ordering Information Product Number FAN7527 FAN7527D Package 8-DIP 8-SOP Operating Temperature -25 ~ +125oC 12 FAN7527 13 FAN7527 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. www.fairchildsemi.com 7/23/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation 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. |
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