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用LM5117做24V转12V50A。原理图用推荐的修改了欠压和频率（频率改为105K）。LM5117 LO占空比丢失 ，而且展不开，无论输出电流1A还是30A，占空比都是10%。
建议测下下管漏极波形。
输出电压可以稳定，但到34A才降到11.2V
