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NCP3020ADR2G Datasheet(PDF) 4 Page - ON Semiconductor |
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NCP3020ADR2G Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 23 page NCP3020A, NCP3020B http://onsemi.com 4 ELECTRICAL CHARACTERISTICS (−40°C < TJ < +125°C, VCC = 12 V, for min/max values unless otherwise noted) Characteristic Conditions Min Typ Max Unit Input Voltage Range − 4.5 28 V SUPPLY CURRENT VCC Supply Current NCP3020A VFB = 0.55 V, Switching, VCC = 4.5 V − 5.1 8.0 mA VFB = 0.55 V, Switching, VCC = 28 V − 6.2 11 mA VCC Supply Current NCP3020B VFB = 0.55 V, Switching, VCC = 4.5 V − 6.8 TBD mA VFB = 0.55 V, Switching, VCC = 28 V − 8.3 TBD mA UNDER VOLTAGE LOCKOUT UVLO Rising Threshold VCC Rising Edge 4.0 4.3 4.7 V UVLO Falling Threshold VCC Falling Edge 3.5 3.9 4.3 V OSCILLATOR Oscillator Frequency NCP3020A TJ = +25°C, 4.5 V v VCC v 28 V 250 300 350 kHz TJ = −40°C to +125°C, 4.5 V v VCC v 28 V 240 300 360 kHz Oscillator Frequency NCP3020B TJ = +25°C, 4.5 V v VCC v 28 V TBD 600 TBD kHz TJ = −40°C to +125°C, 4.5 V v VCC v 28 V TBD 600 TBD kHz Ramp−Amplitude Voltage Vpeak − Valley − 1.5 − V Ramp Valley Voltage 0.46 0.71 0.85 V PWM Minimum Duty Cycle (Note 7) − 7.0 − % Maximum Duty Cycle 80 84 − % Soft Start Ramp Time NCP3020A NCP3020B VFB = VCOMP − − 6.8 3.4 − − ms ERROR AMPLIFIER (GM) Transconductance 0.9 1.3 1.7 mS Open Loop dc Gain (Notes 7 and 9) − 70 − dB Output Source Current VFB = 545 mV 45 70 100 mA Output Sink Current VFB = 655 mV 45 70 100 mA FB Input Bias Current − 0.5 500 nA Feedback Voltage TJ = 25 C 4.5 V < VIN < 28 V, −40°C < TJ < +125°C 0.594 0.588 0.6 0.6 0.606 0.612 V V COMP High Voltage VFB = 0 V 4.0 4.4 5.0 V COMP Low Voltage VFB = 2 V − 65 200 mV OUTPUT VOLTAGE FAULTS Feedback OOV Threshold 0.68 0.75 0.82 V Feedback OUV Threshold 0.42 0.45 0.48 V OVERCURRENT ISET Source Current TBD 12.5 TBD mA Current Limit Set Voltage (Note 8) RSET = 22.5 kW TBD 298 TBD mV 7. Guaranteed by design. 8. The voltage sensed across the high side MOSFET during conduction. 9. This assumes 100 pF capacitance to ground on the COMP Pin and a typical internal Ro of > 10 MW. 10.This is not a protection feature. |
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