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.

UCC28019 GATE门输出PWM频率问题

Other Parts Discussed in Thread: UCC28019

TI的工程师,你们好:

我最近按照手册用UCC28019搭建了一个输入AC24V,输出DC36V的PFC电路。

空载输出正常36V,接重载时也能稳定在36V,但是所用的变压器会发出“滋滋”的响声。

用示波器查看了下8引脚的PWM输出,发现频率是50hz,请问这正常,不应该是65khz的吗,还有变压器发出滋滋声响改如何解决

望大神不吝赐教,谢谢!