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BQ24600: BQ24600对4节锂电池充电管理

Part Number: BQ24600

我们采用BQ24600设计4节锂电池(单节电压3.7V-4.2V)充电管理,参考芯片datasheet种推荐的原理图做了对应需求参数调整。设计指标电源输入24V、5A,电源输出16.8V、6A(用于4S电池充电)。实验结果为能对4S锂电池进行充电,不过功率较低,输入端24V、0.6V,输出端0.8A,与预计设计功率不吻合。请大神帮忙看看问题出现在哪里?

(1)上管MOS栅极波形

(2)下管MOS的栅极波形

(3)经过电感前波形