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FAN7527
Power Factor Correction Controller
Features
•Internal Startup Timer
•Internal R/C Filter Eliminates the Need for an ExternalR/C Filter
•Very Precise Adjustable Output Over Voltage Protection•Zero Current Detector•One Quadrant Multiplier
•Trimmed 1.5% Internal Band gap 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 activepower 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/Cfilter eliminates the need for an external R/C filter. Internallyclamping the error amplifier and multiplier outputs,improves turn on overshoot characteristics and current
limiting. Special circuitry has also been added to prevent noload runaway conditions. Independent of supply voltage, theoutput drive clamping circuit limits overshoot of the powerMOSFET gate drive. This greatly enhances the system reliability.
8-DIP
Applications
•Electronic Ballast•SMPS
1
8-SOP
1
Rev 1.0.4
©2002 Fairchild Semiconductor Corporation
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FAN7527
Internal Block Diagram
Vcc82.5V RefVcc+−11.5V8.5VUVLOInternalBiasDriveOutputTimer R7OUTIdet57.2V2V1.5V+−Zero CurrentDetectorSQStatic OVP40kCS48pF+−RCurrent SenseComparator+−2.25VVrefVeao(L)=2.25V1.8VVmoMULT3Vm10 ~ 3.8VMultiplierVmoK=Vm1⋅(Vm2−Vref)−0.25V+Vm2Vref~Vref+2.5VIsovp=30uAIdovp=40uAOVPCurrentDetector+−VrefVea(-)1INVError Amp6GND2EA_OUT2
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FAN7527
Pin Description
INVEA_OUTMULTCS
1234
(Top View)
8765
VccOUTGNDldet
Pin Number
123
Pin NameINVEA_OUTMULT
Pin Function Description
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 compensation network is placed between this pin and the INV pin.
Input to the multiplier stage. The full-wave rectified AC is divided 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 auxiliary winding voltage falls below 1.8V.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.
4CS
5678
ldetGNDOUTVcc
3
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FAN7527
Absolute Maximum Ratings (Ta=25°C)
CharacteristicsSupply Voltage
Peak Drive Output Current
Driver Output Clamping Diodes Vo > Vcc or Vo < -0.3VDetector Clamping Diodes
Error Amp, Multiplier And Comparator Input VoltagesOperating Junction TemperatureOperating Temperature RangeStorage Temperature RangePower Dissipation
SymbolVCCIOH,IOLlclampldetVinTjToprTstgPd
Value30±500±10±10-0.3 to 6150-25 to 125-65 to 150
0.8
UnitVmAmAmAV°C°C°CW
Temperature Characteristics (-25°C ≤ Ta ≤ 125°C)
Characteristics
Temperature Stability for Reference Voltage (Vref)Temperature Stability for Multiplier Gain (K)
Symbol∆Vref∆K/∆T
Min.--Typ.200.2
Max.--UnitmV%/°C
4
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FAN7527
Electrical Characteristics
VCC= 14V, -25°C ≤ Ta ≤ 125°C, unless otherwise stated.CharacteristicsStart Threshold VoltageUVLO Hysteresis
< SUPPLY CURRENT SECTION >Start-up Supply CurrentOperating Supply CurrentOperating Current at OVP
Dynamic Operating Supply Current< ERROR AMPLIFIER SECTION >Voltage Feedback Input ThresholdLine Regulation
Temperature Stability Of Vref (Note1)Input Bias CurrentOutput Source CurrentOutput 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 Bandwidth (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 VoltageTemperature Stability Of K (Note9)
Ib(m)∆Vm1∆Vm2K∆K/∆T
---Vm1 = 1V, Vm2 = 3.5V-25 ≤ Ta ≤ 125°C
-0.50Vref0.361.65----0.441.8-0.2
0.53.8Vref+2.50.521.95-uAVV1/VV%/°C
Vref∆Vref1∆Vref3Ib(ea)IsourceIsinkVeao(H)Veao(L)GvPSRRGBWSR
Vm2 = 4VVm2 = 4VIsource = 0.1mAIsink = 0.1mA
-14V ≤ Vcc ≤ 25V
--Iref =0mA, Ta =25°C-25 ≤ Ta ≤ 125°C14V ≤ Vcc ≤ 25V-25 ≤ Ta ≤ 125°C
-2.4652.44---0.5-22--6060--2.52.50.120--4462.25808010.6
2.5352.5610-0.5--------VVmVmVuAmAmAVVdBdBMHzV/us
IstIccIcc(ovp)Idcc
Vcc = Vth(st) -0.2VOutput not switchingVinv = 3V50kHz, CI = 1nF
20---6031.74
100648
uAmAmAmA
SymbolVth(st)
HY(st)
Test ConditionVcc Increasing
-
Min.10.52
Typ.11.53
Max.12.54
UnitVV
< UNDER VOLTAGE LOCK OUT SECTION>
Vomax(m)Vinv = 0V, Vm1 = 4V
5
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FAN7527
Electrical Characteristics(Continued)
(VCC= 14V, -25°C ≤ Ta ≤ 125°C, unless otherwise stated.)Characteristics
< CURRENT SENSE SECTION>Input Offset Voltage (Note8)Input Bias Current
Current Sense Delay To Output (Note11)
< DETECT SECTION >Input Voltage ThresholdDetect HysteresisInput Low Clamp VoltageInput High Clamp VoltageInput Bias Current
Vth(det)HY(det)Vclamp(I)Ib(det)
Vclamp(h)Idet = 3mA
1V ≤ Vdet ≤ 5V
-Vdet Increasing
-Idet = -100uA
1.70.20.456.5-1-20.50.757.2-0.1-2.30.817.91±3
VVVVuAmA
Vio(cs)Ib(cs)td(cs)
Vm1=0V , Vm2 = 2.2V0V ≤ Vcs ≤ 1.7V
--10-1-3-0.1200
101500
mVuAns
Symbol
Test Condition
Min.
Typ.
Max.
Unit
Input High/Low Clamp Diode Current
Iclamp(d)
(Note12)
< OUTPUT SECTION >Output Voltage HighOutput Voltage LowRising Time (Note13)Falling Time (Note14)Maximum Output Voltage
Output Voltage With UVLO Activated< RESTART TIMER SECTION>Restart Time DelaySoft OVP Detecting CurrentDynamic OVP Detecting CurrentStatic OVP Threshold Voltage
td(rst)IsovpIdovpVovp
Vinv = 2.7V
VohVoItrtfVomax(o)Vomin(o)
Io = -10mAIo = 10mACI = 1nFCI = 1nF
10.5---12--25352.1
110.81305014-50030402.25
-1200120161-35452.4
VVnsnsVVusuAuAV
Vcc = 20V, Io = 100uAVcc = 5V , Io = 100uAVm1 = 1V, Vm2 = 3.5V
--
Note : 1 ~ 14 These parameters, although guaranteed, are not 100% tested in production.Pin4_Threshold Multiplier Gain: K=------------------------------------------------------......(Vm1=Vpin3,Vm2=Vpin2) Vm1×(Vm2–Vref) 6 元器件交易网www.cecb2b.com FAN7527 Typical Performance Characteristics Fig.1 E.A. Output Voltage vs. C.S. Threshold2.0Vm1=3.0VVm1=2.5VVm1=2.0VVm1=3.5V1.5Vm1=4.0VVm1=1.0V1.0Fig.2 Multiplier Input Voltage vs. C.S. Threshold2.01.8Veao=4.25VVeao=4.0VVeao=3.75VC.S. Threshold Voltage(V)Vm1=1.5V1.61.41.2Veao=4.5VVeao=3.5VC.S Threshold Voltage(V)Veao=3.25VVeao=3.0V1.00.80.60.40.2Veao=2.5VVeao=2.75VVm1=0.5V0.5Vm1=0V0.02.02.53.03.54.04.55.00.0012345EA Output Voltage(V)Multiplier Input Voltage(V)Figure 1. Error Amplifier Output Voltage vs Current Sensing Threshold Fig.3 Supply Current vs. Supply Voltage0.015Figure 2. Multiplier Input Voltage vs Current Sensing Threshold Fig.4 Reference Voltage vs. Temperature2.70.0120.009Reference Voltage(V)010203040502.6Supply Current(A)2.50.0062.40.0030.0002.3-250255075100125Supply Voltage(V)Temperature (℃)Figure 3. Supply Current vs Supply VoltageFigure 4. Reference Voltage vs Temperature Fig.6 UV Lockout Hysteresis vs. Temperature5Fig.5 Start-up Threshold vs. Temperature14121086420-2502550751001254UV Lockout Hyteresis(V)Startup Threshold(V)3210-250255075100125Temperature (℃)Temperature (℃)Figure 5. Start-Up Threshold vs TemperatureFigure 6. UV Lockout Hysteresis vs Temperature 7 元器件交易网www.cecb2b.com FAN7527 Typical Performance Characteristics (Continued) Fig.7 Start-up Supply Current vs. Temperature1009080Fig.8 E.A. Source CurrenT vs. Temperature0Start-up Supply Current(uA)-1706050403020100-250255075100125EA Source Current(mA)-2-3-4-5-250255075100125Temperature (℃)Temperature (℃)Figure 7. Start-Up Supply Current vs Temperature Figure 8. Error Amplifier Source Current vsTemperature Fig.10 E.A. Input Bias Current vs. Temperature0.50.4Fig.9 E.A. Sink Current vs. Temperature5EA Input Bias Current(uA)40.30.20.10.0-0.1-0.2-0.3-0.4EA Sink Current(mA)3210-250255075100125-0.5-250255075100125Temperature (℃)Temperature (℃)Figure 9. Error Amplifier Sink Current vs Temperature Fig.11 Multiplier Gain vs. Temperature1.0Figure 10. Error Amplifier Input Bias Current vs Temperature Fig.12 Idet Threshold Voltage vs. Temperature4.00.6Idet Threshold Voltage(V)-2502550751001250.83.2Multiplier Gain(1/V)2.40.41.60.20.80.00.0-250255075100125Temperature (℃)Temperature (℃)Figure 11. Multiplier Gain vs TemperatureFigure 12. ldet Threshold Voltage vs Temperature 8 元器件交易网www.cecb2b.com FAN7527 Typical Performance Characteristics (Continued) Fig.13 Idet Input Hysteresis vs. Temperature1.0Fig.14 Restart Time vs. Temperature10009000.8Idet Input Hysteresis(mV)8007000.6Restart Time(uS)-2502550751001256005004003002001000.40.20.00-250255075100125Temperature (℃)Temperature (℃)Figure 13. ldet Input Hysteresis vs Temperature Figure 14. Restart Time vs Temperature Fig.15 Max. Mult. Output Voltage vs. temperature2.0Fig.16 Supply Current vs. Temperature5Maximum Mult. Output Voltage(V)1.64Supply Current(mA)1.230.820.410.0-2502550751001250-250255075100125Temperature (℃)Temperature (℃)Figure 15. Max.Mult.Output Voltage vs TemperatureFigure 16. Supply Current vs Temperature 9 元器件交易网www.cecb2b.com FAN7527 Mechanical Dimensions Package Dimensions in millimeters 8-DIP 1.524 ±0.100.018 ±0.0040.060 ±0.0040.46 ±0.106.40 ±0.200.252 ±0.008(#1#89.20 ±0.200.362 ±0.0089.60MAX0.378#4#52.540.1007.620.3005.08MAX0.2003.40 ±0.200.134 ±0.0083.30 ±0.300.130 ±0.0120.33MIN0.0130.79)0.0310.25–0.050.010–0.0020~15°+0.004+0.1010 元器件交易网www.cecb2b.com FAN7527 Mechanical Dimensions (Continued) Package Dimensions in millimeters 8-SOP MIN1.55 ±0.200.061 ±0.0080.1~0.250.004~0.001#1#84.92 ±0.200.194 ±0.0085.13MAX0.202(#4#56.00 ±0.300.236 ±0.012+0.100.15-0.05+0.0040.006-0.0020.56)0.0221.80MAX0.071MAX0.10MAX0.0043.95 ±0.200.156 ±0.0085.720.2250.50 ±0.200.020 ±0.0080~8°1.270.0500.41 ±0.100.016 ±0.00411 元器件交易网www.cecb2b.com FAN7527 Ordering Information Product Number FAN7527FAN7527D Package8-DIP8-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. www.fairchildsemi.com 8/23/02 0.0m 001Stock#DSxxxxxxxx 2002 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. 因篇幅问题不能全部显示，请点此查看更多更全内容