MPC270巴赫曼DIO280

MPC270巴赫曼DIO280

MPC270巴赫曼DIO280

1、对于外围电路一样的PFM和PWM而言,其峰值效率PFM与PWM相当,但在峰值效率以前,PFM的效率远远高于PWM的效率,这是PFM的主要优势.

2、PWM由于误差放大器的影响，回路增益及响应速度受到限制，PFM具有较快的响应速度

PFM相比较PWM主要缺点在于滤波困难

1、滤波困难（谐波频谱太宽）。

2、峰值效率以前,PFM的频率低于PWM的频率,会造成输出纹波比PWM偏大。

MPC270巴赫曼DIO280

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