由于中秋、国庆节假期，帖子审批以及工程师回复将会有所延迟，敬请谅解.

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TMS320F280049C: 关于光耦和TL431对工频纹波的抑制问题

C YG
Prodigy 25 points
Part Number: TMS320F280049C
Other Parts Discussed in Thread: TL431

前级PFC稳定母线电压，PFC输出的母线电压固有100Hz的两倍工频纹波，LLC的输出电压采用光耦+TL431进行闭环，发现此时LLC的输出电压上也有100Hz的纹波。

  

这个原因是光耦和431回路的响应速度太慢导致的吗？该怎么调节一下环路