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TPS2540: 您好,我这边用了一颗TPS2540芯片,采用BC2.1协议,给手机充电,但是测试下来电流只有1A左右。不知道能否帮忙看看是什么地方出了问题?

Part Number: TPS2540

您好,我这边用了一颗TPS2540芯片,采用BC2.1协议,给手机充电,但是测试下来电流只有1A左右。不知道能否帮忙看看是什么地方出了问题?谢谢