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https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/672033/ucc28780-ucc28780-can-not-start
您好：
作为 SCH、源极引脚(Q3)的电压约为2V、因此 VDD 的电压锁定为0V。
您能否检查此 SCH 中是否有任何错误。 谢谢！
尊敬的 Kevin：
封装了整个 SCH。
e2e.ti.com/.../UCC28780-48W-SCH-20180126.pdf
