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BQ24610下管驱动波形不正常

Other Parts Discussed in Thread: BQ24610

咨询一下:

BQ24610输入27.5V,给6S电池充电,充电电流10A,上管的驱动波形和PH的波形正常,但下管的驱动波形上升沿非常缓慢,实际的测试数据:

下管驱动的上升沿是:164ns

上管驱动的上升沿是:60ns

下管驱动波形不正常的原因是什么?