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ucc28019问题

Other Parts Discussed in Thread: UCC28019

 ucc28019上电是否有时序呢?先上电功率部分还是控制部分呢?我为了让功率部分快速充电先上电的功率部分,控制部分不上电时输出就有34v,上电控制后稳压在38v,设计的24v交流转36v直流,这样的现象是不是电路有问题还是正常现象?而且用电流互感器测变压器连到整流桥的波形是这样的,是电路失败了还是测量问题?