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UCC256301绕过HV引脚，直接给VCC供电15V，但是RVCC没有电压。是只能接高压才能出现RVCC电压吗？还是我的片子坏了？求大佬指点
你好，一旦 VCC 引脚电压超过其 VCCStartSwitching 阈值，电流源将关闭，并启用 RVCC 以打开 PFC。所以VCC电压上来就是13V是出不来RVCC电压的，先调到26V，再降到13V即可正常输出
