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UCC28220驱动异常



28220做正激电源,输出空载,输出电压不正确。设置输出29V,实际输出20V,测试驱动波形异常。当断开mos管后,驱动波形回复正常。只断开其中一路时,两路驱动也都是异常。希望专家解答,感谢!