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BQ4050: 电池充电充不满,16.5V就截止了,FC无法置1

Part Number: BQ4050
Other Parts Discussed in Thread: BQ24610,

您好,我参考设计的BQ4050充电时电池充不满,使用的是四节串联18650锂电池,3400mA,前方充电电路是BQ24610。每次充到16.5V就截止充电了,看BQ Studio里面HV会置高,但是FC始终为0,试过把充满电的电池的接上去看,FC就会变成1,不明白为什么电池充电达不到16.8V,只能到16.5V了,请求各位大神指导一下了