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NCP1561 Datasheet(PDF) 11 Page - ON Semiconductor |
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NCP1561 Datasheet(HTML) 11 Page - ON Semiconductor |
11 / 22 page NCP1561 http://onsemi.com 11 TYPICAL CHARACTERISTICS TJ, JUNCTION TEMPERATURE (°C) 125 100 75 50 25 0 −25 −50 3.0 3.5 4.0 4.5 5.0 5.5 6.5 7.0 150 6.0 30 35 40 45 50 55 65 70 60 CHARGE DISCHARGE 525 450 225 150 75 0 0 5 10 20 30 45 375 300 15 25 TJ = −40°C TJ = 125°C 40 35 VEA = 3.0 V DCMAX PIN = OPEN TJ, JUNCTION TEMPERATURE (°C) 150 125 100 75 0 −25 −50 20 25 35 40 45 50 50 25 RP = OPEN, RMDP = OPEN RP = 0 W, RMDP = OPEN Vin = 36 V RFF = 432 kW Figure 22. Maximum Duty Cycle versus Feedforward Current Figure 23. Maximum Duty Cycle versus Junction Temperature Figure 24. Soft−Start Charge/Discharge Currents versus Junction Temperature IFF, FEEDFORWARD CURRENT (mA) 50 30 Figure 25. VEA Input Resistance versus Junction Temperature TJ, JUNCTION TEMPERATURE (°C) 150 100 50 0 −50 0 10 20 40 50 30 −25 125 75 25 TJ, JUNCTION TEMPERATURE (°C) 150 125 100 25 0 −25 −50 0.75 0.80 0.85 0.95 1.00 50 75 0.90 Figure 26. PWM Comparator Lower Input Threshold versus Junction Temperature TJ, JUNCTION TEMPERATURE (°C) 125 100 75 50 25 0 −25 −50 4.91 4.93 4.95 4.97 5.01 150 IREF = 0 mA IREF = 6 mA 4.99 Figure 27. Reference Voltage versus Junction Temperature RFF = 432 kW Vin = 48 V |
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