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NCP1282BDR2G Datasheet(PDF) 5 Page - ON Semiconductor |
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NCP1282BDR2G Datasheet(HTML) 5 Page - ON Semiconductor |
5 / 23 page NCP1282 http://onsemi.com 5 ELECTRICAL CHARACTERISTICS (Vin = 48 V, VAUX = 12 V, VUVOV = 2.3 V, VEA = open, VCSKIP = 0 V, VCS = 0 V, VSS = open, RT = 13.3 kW, CAUX = 10 mF, CT = 470 pF, Cout1 = Cout2 = 100 pF, CUVOV = 0.01 mF, CCSKIP = 6800 pF, RD = 25 kW, RSYNC = 5.0 kW, CREF = 0.1 mF, RFF = 29.4 kW, CFF = 470 pF. For typical values TJ = 25°C, for min/max values, TJ is – 40°C to 125°C, unless otherwise noted.) Characteristic Symbol Min Typ Max Unit STARTUP CONTROL AND VAUX REGULATOR VAUX Regulation (VUVOV = 0 V) Inhibit Threshold Voltage Startup Threshold/VAUX Regulation Peak (VAUX Increasing) Operating VAUX Valley Voltage Minimum Operating VAUX Valley Voltage after Turn−On (VUVOV = 2.3 V, VEA = 0 V) Vinhibit VAUX(on) VAUX(off1) VAUX(off2) – 10.6 8.9 8.0 1.15 11.1 9.4 8.4 1.6 11.6 9.9 9.0 V Minimum Startup Voltage (Pin 1) IAUX = 1.0 mA, VAUX = VAUX(on) – 0.2 V Vstart(min) – – 23.2 V Inhibit Bias Current VAUX = 0 V Iinhibit 70 171 270 mA Startup Circuit Output Current VAUX = Vinhibit + 0.2 V VAUX = VAUX(on) – 0.2 V Istart1 Istart2 7.16 4.03 9.3 6.1 11.3 8.1 mA Startup Circuit Off−State Leakage Current (Vin = 500 V, VUVOV = 0 V) TJ = 25°C TJ = –40°C to 125°C Istart(off) – – 25 – 50 100 mA Startup Circuit Breakdown Voltage (Note 3) Istart(off) = 50 mA, TJ = 125°C VBR(DS) 500 – – V Auxiliary Supply Current after VAUX Turn−On Outputs Disabled VUVOV = 0 V VEA = 0 V Outputs Enabled VEA = 4.0 V IAUX1 IAUX2 IAUX3 – – – 3.1 4.3 4.9 3.6 4.94 7.0 mA LINE UNDER/OVERVOLTAGE DETECTOR Undervoltage Threshold (Vin Increasing) VUV 1.979 2.05 2.116 V Undervoltage Hysteresis VUV(H) 0.074 0.093 0.118 V Undervoltage Ratio (VUV(H)/VUV) VUV(ratio) 3.65 4.5 5.62 % Overvoltage Threshold (Vin Increasing) VOV 2.80 2.95 3.10 V Overvoltage Hysteresis VOV(H) 0.075 0.093 0.127 V Offset Current (VUVOV = 2.8 V) Ioffset(UVOV) 38 48 58 mA Offset Current Turn ON Threshold ("5%, Ioffset(UVOV) = 40 mA) Voffset(UVOV) 2.4 2.6 2.8 V LINE FEEDFORWARD Peak Voltage (Volt−Second Clamp) VFF(peak) 2.8 3.0 3.2 V Discharge Current (VFF = 0.5 V, VSS = 0 V) IFF(D) 8.5 – – mA Offset Voltage (VFF = 0 V, Ramp Down VSS) Voffset(FF) 0.118 0.185 0.268 V Feedforward Offset Minus Soft−Stop Reset Voltage D(FF−SS) 7 70 183 mV 3. Guaranteed by design only. |
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