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tl494做二极管续流型buck电路，4引脚直接接地，但是芯片最大占空比输出只有88%，达不到96%，请问这有可能是什么原因造成的？谢谢！
怎么看规格书TL494的最大占空比是45%？如果想做BUCK电路，完全可以采用其他控制芯片，可以给出规格我们再推荐。
