FAN7554 high voltage output flyback power supply
Source: InternetPublisher:Lemontree Keywords: Flyback power supply switching power supply Updated: 2023/11/28
High voltage boost power supply circuit: AC 220V to DC 600V switching power supply circuit
Specification:
Output voltage = 0~600Vdc 0.25A
Switching frequency: 70~100kHz
Design Guidelines:
In DCM mode, the output power is 200 watts
The continuous current mode calculation formula for the degradation of the input rms current is: Irms=Po/Vdc=200/(220*0.9*1.414)≈0.72
If the optimal operating duty cycle is set to D = 0.35, then input the peak current: Ipeak=(Irms/D)*2=(0.72/0.35)*2 ≈4.11
Therefore, the voltage detection voltage level limit from FAN7554 data is 1.5V
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