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BQ24616充电电流出现奇怪的问题!望解答,谢谢!

Other Parts Discussed in Thread: BQ24616

1.采用BQ24616进行电池充电,预设恒流充电电流3A,外部输入12V/3A,但实际充电电流只有1A,电池确定处于恒流充电阶段。 问什么电流上不去呢? 2.测试发现随着输入电压的升高,充电电流在升高,为什么充电电流会变呢? 3.当输入电压升为28V时,充电电流在大概到了1.8A,但是此时芯片在啸叫,为什么啸叫呢? 大侠们帮忙看看,万分感谢!