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ucc28060异常

Other Parts Discussed in Thread: UCC28060

当输入电压较低时,工作正常,当电压升高后就会出现异常声音,监测栅极驱动信号,发现两项信号在部分区域相位差为零,请问何故,另外,我的设计是用在350-450伏交流电压输入等级上,在设计参数时,有何考虑。

 

这个电压等级下,如何特殊考虑COMP及tset两个引脚外接器件?