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UC3525只作逆变时, 反馈端1脚的接法

Other Parts Discussed in Thread: TL431

如图所示,  请问, 如果我在DC-DC之后, 只是想把直流信号变为方波,  利用全桥拓补,  此时,  控制端的UC3525的1脚可以直接接地吗?  像我这样的接法是否正确呢?  请大家帮助, 谢谢!