Looking for an up converter

[dkace]

Hi all,
I want to go from 5Vdc to 350V dc ( +/- 25Vdc). Can anyone inicate a PCB mounted transformer please? or, is there any other suggestion?
Thanks,
D.

 

[gidimiz]

Hi,
There is a very simple way to do that but it all depands what how you will build that. This is schamtic that i took from Microchip tips and trics is only for 2*Vdd and you can make it even higher voltage if you will add the the connection of the Cpump.
Also, see this link:
http://www.discovercircuits.com/V/voltage-multi.htm

Good luck.

 

[dkace]

Thanks gidimiz, the link looks interesting. But the topology is not what I want. Do be more specific I need a transformer to go from 5 to 350. Is there a page I can look for?
D.

 

[gidimiz]

Hi,

Sorry, i thougt you ment only 35V!

So here is another link that will probably solve your problem.
http://www.techlib.com/electronics/highvolts.html

YES?

 

[ezpcb]

**broken link removed**
here it is. I had got 500V with this simple circuit. The transformer is important, especially when the voltage is high.



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[dkace]

Can you explain some more regarding the transformer? How did you obtained 500V from 240 V for instance?
Thanks,
D.

 

[ezpcb]

Can you explain some more regarding the transformer? How did you obtained 500V from 240 V for instance?
Thanks,
D.

That's quite easy, a voltage doubler circuit with several diodes and capacitors is OK. A ferrite core transformer is required for that circuit, we can buy it at the price of just a few dollars

mike

 

[cesare]

You can simply use a flyback circuit. It can be besed on one of the several controllers available on the market. For example you can use LM3478.