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DC-DC有关问题



   对DC-DC有几个疑问请大家帮忙看看:

1.DC-DC用得最多的控制方式是PWM,这是什么原因?只看到有部分描述高负载用PWM,低负载用PFM控制;

2.如下图所示,以TPS62810为例,通常而言,电感前端是类似正弦波形,如果输出5V电压,A点这里瞬间电压一般能达到多少?