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UCC2895: 超前桥臂驱动大小波

Part Number: UCC2895

各位专家好,我在使用UCC2895的时候,稍微带载出现超前桥臂驱动大小波的问题,拓扑为滞后桥臂串联二极管的ZVZCS移相全桥,电压模式控制,请问一下出现这种情况的原因一般是什么呢?  黄色波形为超前桥臂C驱动 蓝色为滞后桥臂B驱动