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TPS65251带上负载后,电压输出降低?

Other Parts Discussed in Thread: TPS65251

你好:

        我的电源芯片选用的是TPS65251,空载输出时,三路输出电压都正常,但是带上负载后,输出电压都变低?不知道是什么原因请帮助分析一下!三路输出电感都没有发烫,电感没有饱和。