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BQ25703A充电效率能达到多少?



我现在输入电压5V,输出电压12.6V(3节锂电池),输出电流1A,充电效率只能达到86%左右,而根据芯片手册上的图表显示能达到92%以上,想请教下怎么提高效率。我现在的电路是参考了评估的设计方案。