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TPS2543限流设定

Other Parts Discussed in Thread: TPS2543

大家好,现有个项目用TPS2543做USB充电器,充电电流最大2A,同时支持USB通信,以下为TPS2543电路图。

IC工作于CDP模式,根据手册中限流公式,将下限电阻设定为80K,上限电阻设为25K,限流上限值理论上2A左右。

下图是在手册的16页截得。

这里CDP模式最大电流为1.5A。

以上两种限流,哪个为主呢?