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BQ24251充电电流无法达到设定值

Other Parts Discussed in Thread: BQ24251

用BQ24251充电,用的是TI的参考设计结合到自己的主板上,工作在SA模式下,但是在使用ISET和ILIM配置充电电流的时候无法成功,设置成多大充电电流都在700mA左右,和开发板对比ILIM管脚电压值为0,请问这是什么情况。