While not the "best", the UC3842 is one of the most popular, inexpensive and easy to use.
And it is available from various manufacturers. The CMOS versions help with a lower startup current.
So You need to build a DC/DC postregulator, non-isolated from the primary, buck-type. Suggest You'd use any current-mode SMPS IC. UC3842...UC3845 is a good choise to start You design with. Another good variant is UC3823...UC3825 family.:|
There are also some specialised ICs manufactured by ST etc for buck converters.
Frnds,
I will like to make the picture more clear!
I have generated 385 V DC using ML4821 PFC controller.
Now i want to make this computer controlled varibale from 100 to 385 V using some PWM controller. From computer using some DAS card I want to chnage analog input 0 to 2V and make the output variable. currently I have planned to use the TL494.
I see in Power supply for computer , they are usually use TL494 . Maybe there aren't much difference those IC . The most important is your design . But I don't have a good book about this . Anybody have a good design switching power supply give me a advise.