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CM6903 Folha de dados(PDF) 4 Page - Champion Microelectronic Corp. |
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CM6903 Folha de dados(HTML) 4 Page - Champion Microelectronic Corp. |
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4 / 14 page ![]() CM6903/4 Low Pin Count PFC/PWM CONTROLLER COMBO 2002/12/16 Preliminary Rev. 0.4 Champion Microelectronic Corporation Page 4 ELECTRICAL CHARACTERISTICS (Conti.) Unless otherwise stated, these specifications apply Vcc=+15V, RT = 52.3kΩ, CT = 470pF, TA=Operating Temperature Range (Note 1) CM6903/4 Symbol Parameter Test Conditions Min. Typ. Max. Unit PFC OVP Comparator Threshold Voltage 2.70 2.77 2.85 V Hysteresis 230 290 mV PFC ILIMIT Comparator Threshold Voltage -0.9 -1 -1.15 V Delay to Output 150 300 ns VIN OK Comparator Threshold Voltage 2.35 2.45 2.55 V Hysteresis 1.65 1.75 1.85 V PWM Digital Soft Start Right After Start Up (CM6903) 10 ms Digital Soft Start Timer (Note 2) Right After Start Up (CM6904) 5 ms DC ILIMIT Comparator Threshold Voltage 1.4 1.5 1.6 V Delay to Output (Note 2) 150 300 ns Tri-Fault Detect Comparator Fault Detect HIGH 2.65 2.75 2.85 V Time to Fault Detect HIGH VFB=VFAULT DETECT LOW to VFB = OPEN, 470pF from VFB to GND 2 4 ms Fault Detect LOW 0.4 0.5 0.6 V Oscillator Initial Accuracy TA = 25℃ 62 67 74 kHz Voltage Stability 10V < VCC < 15V 1 % Temperature Stability 2 % Total Variation Line, Temp 60 67 74.5 kHz PFC Dead Time (Note 2) 0.3 0.45 0.65 µs PFC Minimum Duty Cycle IAC=100uA,VFB=2.55V, ISENSE = 0V 0 % Maximum Duty Cycle IAC=0uA,VFB=2.0V, ISENSE = 0V 90 95 % Output Low Impedance 8 15 ohm IOUT = -100mA 0.8 1.5 V Output Low Voltage IOUT = -10mA, VCC = 8V 0.4 0.8 V Output High Impendence 8 15 ohm Output High Voltage IOUT = 100mA, VCC = 15V 13.5 14.2 V Rise/Fall Time (Note 2) CL = 1000pF 50 ns |
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