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NCP1280_05 Datasheet(数据表) 6 Page - ON Semiconductor |
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NCP1280 Datasheet(HTML) 6 Page - ON Semiconductor |
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6 page 
NCP1280 http://onsemi.com 6 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 OSCILLATOR Frequency (RT = 101 kW) TJ = 25°C TJ = −40°C to 125°C fOSC1 285 280 300 − 315 320 kHz Frequency (RT = 220 kW, VEA = 1.0 V) TJ = 25°C TJ = −40°C to 125°C fOSC2 142 140 150 − 158 160 kHz MAXIMUM DUTY CYCLE COMPARATOR Maximum Duty Cycle (VEA = 3.0 V, TJ = 25°C) RP = 0 W, RMDP = open RP = open, RMDP = open DCMAX 57 75 62 80 66 85 % Open Circuit Voltage VDCMAX 0.40 0.47 0.60 V SOFT−START Charge Current (VSS = 1.0 V) ISS(C) 5.0 6.2 7.4 mA Discharge Current (VSS = 5.0 V, VUV/OV = 0 V) ISS(D) 20 52.5 − mA PWM COMPARATOR Input Resistance (V1 = 1.25 V, V2 = 1.50 V) RIN(VEA) = (V2 − V1)/(I2 − I1) RIN(VEA) 8.0 22 60 k W Lower Input Threshold VEA(L) 0.3 0.7 0.9 V Delay to Output (from VOH to 0.5 VOH) tPWM − 200 − ns 5.0 V REFERENCE Output Voltage (IREF = 0 mA) TJ = 25°C TJ = −40°C to 125°C VREF 4.9 4.8 5.0 − 5.1 5.1 V Load Regulation (IREF = 0 to 6 mA) VREF(Load) − 10 50 mV Line Regulation (VAUX = 7.5 to 16 V) VREF(Line) − 50 100 mV CONTROL OUTPUTS Output Voltage (IOUT = 0 mA) Low State High State VOL VOH − − 0.25 11.8 − − V Overlap Delay RD = 1 MW Leading Trailing RD = 60 kW Leading Trailing tD − − 50 32 200 170 90 72 − − 130 130 ns Drive Resistance (Vin = 15 V) Sink (VEA = 0 V, VOUT = 2 V) Source (VEA = 3 V, VOUT = 10 V) RSNK RSRC 20 50 40 90 80 170 W Rise Time (CL = 100 pF, 10% to 90% of VOH) ton − 30 − ns Fall Time (CL = 100 pF, 90% to 10% of VOH) toff − 12 − ns |
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