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TPS54334的最大占空比是多少?

Other Parts Discussed in Thread: TPS54334, LM25118

使用TPS54334,我想知道极端状况下,12V转12V,输出电压会低到多少V?

  • Hi
    没法到100%,除非 BOOT-SW voltage is higher than the BOOT-SW UVLO threshold, 这个得额外增加电路。
    即便100%, 也会因为MOS, 电感出现一些下降,你需要根据电流来计算。
    正常评估,你可以按照最大28V输入时最多24V输出来评估最大占空比,但仍可能要稍微低一点点。
    如果应用中会出现最低12V输入,但是要12V输出,仍建议用buck-boost芯片来做。例如LM25118之类。