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BQ24195无法实现输入电流大于3A

Other Parts Discussed in Thread: BQ24195

有几个问题想请教一下各位,用BQ24195作为充电芯片,在VBUS=5.1V时,无论通过I2C怎么设置,输入电流都只有0.5A,当VBUS升到7.4V时,输入电流达到最大,imax=1.43A。继续升压,芯片停止充电,LED频闪。ILIM引脚已经接地,但是还是无法达到输入电流3A.有没有专家牛人知道一下?