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BQ24251电流限制问题

Other Parts Discussed in Thread: BQ24251

BQ24251充电电流上不去,空载的情况下,接入安卓适配器应该有1A以上的充电电流,但现在只有300mA左右,测得输入电流也只有300mA左右,感觉是被限制了,外部限流电阻的阻值经过计算是限制1A左右,应该没问题,现在输入电流上不去,想请教一下大概是什么问题?