MVME167-033B

MVME167-033B

MVME167-033B 开关管驱动控制芯片选电流控制型PWM芯片UC2844(这类芯片也是蛮多的，系列延伸也多，大家可以去了解一下)，输出稳压控制采用TL431基准源，开关频率设定为41kHz。

确定电源工作状态参数

①计算变压器原边输入功率

我们这里假设变压器的传输效率是95%，那么其原边的输入功率为：

Pin=Pout/0.95=45/0.95=47.4W

②确定大导通占空比

设小输入电压Uin,min=400V时，Dmax=31%

③确定开关频率和变压器原边电感量

MVME167-033B 

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