This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

tps40210效率问题,有图见sch,有测试报告

Other Parts Discussed in Thread: UCC38C44

原理图www.ti.com.cn/.../slur288.pdf

测试报告www.ti.com.cn/.../slur292.pdf

PMP4626.2 Test Results

第三页的效率图

为什么输入电压越高,效率越低,而且差距不小?

36v输入时,仅82%,很意外。什么原因?

有什么办法改善吗?

客户的要求是9-36v输入,在10-30v时满载输出12v,20w,不能小于87%,最好是90%以上