# Isolated power supply for high input voltage

#### karas

Joined Sep 8, 2011
211
I need to convert 500 to 1000vdc to 24 vdc 10w isolated from its input ,I can do this by using SEPIC TOPOLOGY FOLLOWED BY FLYBACK BUT THIS WILL BE EXPENSIVE , is there another cheapest way

#### JUNELER

Joined Jul 13, 2015
183
Hi
can you give me the idea what really exact voltage you needed. is it 24v dc only.
how come you are trying a conversion of such step.
If only 24v dc you need i can suggest the cheapest way.

#### tcmtech

Joined Nov 4, 2013
2,867
Where is the 500 - 1000 VDC coming from to begin with?

#### karas

Joined Sep 8, 2011
211
Hi
can you give me the idea what really exact voltage you needed. is it 24v dc only.
how come you are trying a conversion of such step.
If only 24v dc you need i can suggest the cheapest way.
I need only 24vdc 10W

#### karas

Joined Sep 8, 2011
211
Where is the 500 - 1000 VDC coming from to begin with?
coming from solar cells

#### tcmtech

Joined Nov 4, 2013
2,867
Seems unusually high for solar power unless it's a huge multi hundred KW system.