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.

UCC28600: UCC28600 一直以40k 的频率工作,无法提高频率,求助分析

Part Number: UCC28600

使用UCC28600作为高压反激电源控制芯片。

原理图如下

UCC28600 一直以40k  的频率工作,无法提高频率,求助分析

固定输入电压,提高负载,开关频率40K

固定负载,改变输入电压,开关频率40K

带载启机波形