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ucc3895输出频率问题

Other Parts Discussed in Thread: UCC3895

ucc3895移相全桥芯片如何才能使频率调到40KHZ对应输出20KHZ,用以驱动IGBT模块。 第一次用这个芯片,UCC3895,通过RC调整好像调节不到40KHZ,是不是要在外面单独做个电路,产生40KHZ的方波,加到SYCN脚。