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UCC2897A 供电问题

Other Parts Discussed in Thread: UCC2897, LM5025A, UCC2897A

现在用UCC2897A做了一个方案,在TI的参考设计资料中,VCC供电,是采用变压器反馈绕组进行供电,先前我们也有使用TI的另外一款芯片LM5025A,用的VCC供电是采用降压电路进行供电,后面我把他也改成反馈绕组供电,效果不是很理想,经常把LDO损坏,我看了LM5025A空载消耗了几十毫安电流,现在不知道UCC2897也有没有这个问题,谢谢!