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BQ24092充电电流问题

Other Parts Discussed in Thread: BQ24092

我使用了BQ24092作为锂电池的充电,锂电池450mAh,充电电流设定450mA。但是对于同一块板子充电时候有时候会以450mA进行充电,并且指示灯也亮,而有时候却以大概150mA的电流,可能在充电,指示灯不亮,这是个什么梗?请大神们帮助。电路图就是典型图,iset2拉低,ts接热敏电阻,电压测试过也正常。只有把充电电流设小到大概200mA灯才会正常。请大神帮助,谢谢