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bq24253锂电充电器!

Other Parts Discussed in Thread: BQ24253

用bq24253芯片,手册中推荐的应用电路画的PCB板,但是做出来的锂电充电器总是烧芯片!只有电源灯亮,充电灯不亮(充不进去电),这是怎么回事儿??