我做的是2015年全国电赛A题，双向DC-DC变化那道题。设计了如图所示的双向DC-DC电路，用IR2104驱动，高端输出接QI开关管，低端输出接Q2开关管，空载的时候输出电压
正常，但是接上电池后，电压被拉低，导致充电电流达不到2A，（实际测试为输入25V，占空比为80%时，输出电压为18V，正常应该为20V.）。
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关于BUCK电路接上电池后电压降低的问题
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