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LM5023环路如何设计

Other Parts Discussed in Thread: LM5023

一般光耦工作电流在1mA以上工作比较好,但LM5023COMP脚通过上拉42KR电阻内接5V电源,实际只能提供130uA左右的电流就达到饱和了。而依照WEBENCH设计没有外接上拉电阻提供光耦偏置电流,实际上工作也不稳定。请问LM5023的环路要如何设计?谢谢!