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BQ24610充电电压提不上去,且电感一直响

Other Parts Discussed in Thread: BQ24610

使用BQ24610充电,电源输入16V~25V,电池12.56V锂电池,充电电流设置的1.9A,做了两次PCB,第一次正常,没有问题,第二次重新LAYout了,出现以下问题

1. 充电电流往大调无论怎么修改阻值,充电电流都是1A,但是充电指示却是正常的,STAT1为0V,STAT为3.3V,往小调充电电流有变小;确认充电模式是快充阶段;

2.充电时,电感一直响,用示波器量了一下BTST波形,波形很不好

电感输出端波形如下

BTST管脚波形如下: