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DCP021212DU隔离电源,输出正负电压不对,求助各位大神!



 DCP021212DU

1、用12V电源供电,隔离输出后,空载测量正电压是+25V左右,负电压是-24左右。

2、是5V电源供电,隔离输出后,空载测量正电压是+12V左右,负电压是-12左右。

芯片技术手册上说,12V供电,输出是±12左右!我们好几个芯片测试都是输出±24左右。我们电路是按照ti的手册上的示意图连接的!请各位大神指点!

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