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HI
可以将输入电容加大一些看看,如果依旧你可以不带TPS61220的情况下,直接带负载,看这是否是热电片带载特性?
HI
TPS61220电路外加1V电压确认芯片能正常工作。 此时用热片供电,TPS61220空载下,看输入是否也拉低?