140V to 12V Dc Dc Regulator

[M.Rehan]

Can any one suggest a Linear (Preferred) or Non-Linear Voltage regulator for 140V to 12V and Max Current of about 5A

I want to use 140V Battery to power up 12V ICs on PCB

 

[Easyrider83]

Any regular power supply with 110-250V range will handle this.
https://ru.aliexpress.com/item/12V-..._6&btsid=48f55ef9-2710-4a4b-967a-da60273263ef

 

[M.Rehan]

I am not asking for Ac Power Supply

I need something like LM7812 or and any small buck converter for PCB mount
https://www.fairchildsemi.com/datasheets/LM/LM7812.pdf

 

[Easyrider83]

How good you know Ohm's law? (140 - 12) * 5 = 640W power loss in case of linear regulation using. That's not funny even. That's really dangerous.
The only way for you is to copy AC-DC power supply (remove diode bridge and it will become DC-DC converter) to your application.

 

[M.Rehan]

Thanks, I confused linear with non linear

Any Non-Linear regulator/small Buck converter?

 

[Bilal_Ahm]

rehan are u from lahore?

 

[schmitt trigger]

I have personally used the solution that easyrider83 refers to.
Take any of the universal input voltage converters you can purchase, and just apply DC to it. The bridge rectifier will always be working on a single direction, but so what?

This is not only the cheapest solution, it will provide an isolated secondary side from the primary voltage, and will save you a ton of time, expense and aggravation designing your own PSU (which is not trivial if you have never designed one).