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NCP1280_05 Datasheet(数据表) 5 Page - ON Semiconductor |
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NCP1280 Datasheet(HTML) 5 Page - ON Semiconductor |
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5 page 
NCP1280 http://onsemi.com 5 ELECTRICAL CHARACTERISTICS (Vin = 82 V, VAUX = 12 V, VEA = 2 V, RT = 101 kW, CCSKIP = 6800 pF, RD = 60.4 kW, RFF = 1.0 MW, for typical values TJ = 25°C, for min/max values, TJ = −40°C to 125°C, unless otherwise noted) Characteristic Symbol Min Typ Max Unit STARTUP CONTROL AND VAUX REGULATOR VAUX Regulation Startup Threshold/VAUX Regulation Peak (VAUX increasing) Minimum Operating VAUX Valley Voltage After Turn−On Hysteresis VAUX(on) VAUX(off) VH 10.5 6.6 − 11.0 7.0 4.0 11.5 7.4 − V Minimum Startup Voltage (Pin 1) ISTART = 1.5 mA, VAUX = VAUX(on) − 0.2 V, IREF = 0 A VSTART(min) − − 25 V Startup Circuit Output Current VAUX = 0 V TJ = 25°C TJ = −40°C to 125°C VAUX = VAUX(on) − 0.2 V TJ = 25°C TJ = −40°C to 125°C ISTART 13 10 10 8 17.5 − 13.8 − 21 25 17 19 mA Startup Circuit Off−State Leakage Current (Vin = 700 V) TJ = 25°C TJ = −40°C to 125°C ISTART(off) − − 23 − 50 100 mA Startup Circuit Breakdown Voltage (Note 2) ISTART(off) = 50 mA, TJ = 25°C V(BR)DS 700 − − V Auxiliary Supply Current After VAUX Turn−On Outputs Disabled VEA = 0 V VUV/OV = 0.7 V Outputs Enabled IAUX1 IAUX2 IAUX3 − − − 2.7 1.3 4.6 5.0 2.5 6.5 mA LINE UNDER/OVERVOLTAGE DETECTOR Undervoltage Threshold (Vin Increasing) VUV 1.40 1.52 1.64 V Undervoltage Hysteresis VUV(H) 0.080 0.098 0.120 V Overvoltage Threshold (Vin Increasing) VOV 3.47 3.61 3.75 V Overvoltage Hysteresis VOV(H) − 0.145 − V Undervoltage Propagation Delay to Output tUV − 250 − ns Overvoltage Propagation Delay to Output tOV − 160 − ns CURRENT LIMIT Cycle by Cycle Threshold Voltage ILIM1 0.44 0.48 0.52 V Propagation Delay to Output (VEA = 2.0 V) VCS = ILIM1 to 2.0 V, measured when VOUT reaches 0.5 VOH tILIM − 90 150 ns Cycle Skip Threshold Voltage ILIM2 0.54 0.57 0.62 V Cycle Skip Charge Current (VCSKIP = 0 V) ICSKIP 8.0 12.3 15 mA 2. Guaranteed by design only. |
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