High Voltage Regulator Design

[arg_]

This article might help:
(provides a regulated output up to 350 volts and 100 mA)

OTB - A Solid-State Filter Choke or Field Coil Replacement

hello,

What would be the best way to increase the available output current of this circuit? To put more TIP50's in parallel or to use two of them in a darlington configuration (thus multiplying the beta)

thanks

 

[steve1112]

arg,

If I understood the article correctly, the output current is limited by the current that the LR8N3 can deliver, not by what the TIP50 can deliver. If that's the case, going for a higher beta would be a better choice than asking the LR8N3 to drive two TIP50's. Only one of the transistors in the pair would have to be a power transistor. The other transistor would just have to supply the base current to the TIP50.

Steve

 

[arg_]

yes, I too think that a higher beta transistor will do the job.

In fact I have spotted the BU931T Darlington from ST which is rated at 400V and with a hfe of 300@5A,10V. It may be a bit of overkill but I will give it a try anyway 🙂

 

[quanghao]

Pleas see my friend design power supply for his amli !
it is simple!

 

[rsumperl]

I'm going to design a High Voltage Bench Supply.

Novotone - Projects - 05 Alimentation HT de laboratoire - Gamme de 50 à 450 V - 500 mA

I saw this design. I belive It will be good. I'm studying to make this Pre-regulator for more voltages and use this in a Pre-amp or something else.

Regards,
Felipe

I bought some of these boards, I'll let everyone know how it works out. The boards are nice.

Ray

 

[Burnedfingers]

quote:
Pleas see my friend design power supply for his amli !
it is simple!


What is the max input voltage and output voltage of your friends board?

And how much money?