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LM25116同步降压电路,电感总是响

Other Parts Discussed in Thread: TPS62130, LM25116

您好:

我使用了TI的LM25116这款芯片来做9-30V输入,5V,7A输出电路。然后5V后面带两片TPS62130芯片,具体电路见附件。电路电压输出正常,输出电流也能达到6A左右,但是无论是什么情况下,电感总是响。不论是LM的电感,还是TPS得,都发出吱吱的响声。

下面为两个MOS管的G极的波形图,一个明显有问题。

LJ_power.PDF