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请问哪里改用50%占空比的芯片UC3844,哪里改用100%占空比的芯片UC3843?

Other Parts Discussed in Thread: UC3843, UC3844

各位前辈好。

         请问哪里改用50%占空比的芯片UC3844,哪里改用100%占空比的芯片UC3843?两者之间在应用方面有什么区别或者要特别注意的地方?

谢谢。