诚心请教SG3525做的12V转正负36V功放电源稳压问题

在这里潜水学习了一段时间了,希望能做个12V转双36V的200W左右的电源,现在试验的磁环变压器是按照坛子里的师傅指点绕的,初级0.8的线8股4圈*2,次级0.8的线10圈*2中心抽头,整流做正负电源,MOS管用了两对60NF06.

现在的问题是我做的开环的,没加稳压,也不知道该怎么计算稳压电路的部分,空载或者接功放板音量关小时单路电压达到40几V,音量开到一半的时候电压就跌到25V左右了.大动态的时候电压跌的更厉害.

希望大侠指点一下,应该怎么样接个稳压电路比较好,我希望满载输出的时候和空载的时候电压都能在36V左右,网上看到有人说功放供电不需要稳压,可大动态的时候电压低了功率就小了啊,要是通过增加次级圈数把满载的时候电压弄合适了,那空载估计要烧功放了.
电路是用的下面这个最简单的,希望哪位师傅能传张3525,变压器,和MOS管在一起布线的PCB图,前期试验的时候我把变压器焊到板子上次级整流后100多V接200W灯泡就单边发热.
谢谢啦

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