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BQ21040,号称最大800mA的充电电流,为什么我设置为540mA充电电流时,IC会很快发热并使充电电流降低到了400mA左右?

Other Parts Discussed in Thread: BQ21040

BQ21040,号称最大800mA的充电电流,为什么我设置为540mA充电电流时,IC会很快发热并使充电电流降低到了400mA左右?