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UCC28950做移相遇到问题求解

Other Parts Discussed in Thread: UCC28950

大家好,我用UCC28950做移相全桥,现在在调式主功率部分,主功率电路没上电是驱动波形是好的,但是上电了之后驱动波形就变成这样了(波形是经过光耦隔离后输出的)而且带载能力也不行。