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Reduction of 48V DC to 12V DC

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Ogu Reginald

Ogu Reginald

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Hi,
I have a bank of battery with output voltage of 48V. Now there is an electronic circuit which requires 12V, 1A to work. I want the simplest circuit diagram that can be used to reduce the 48V to 12V.
Thanks.
 

Use a Integrated Regulator IC with a external Pass Transistor ( due to exceeding power dissipation for IC ) or use simple DC-DC Step-Down Converter IC.
If the electronic circuit is not very sensitive to noise, I'd prefer DC-DC Step-Down Converter.
https://www.linear.com/product/LT3991#overview

There are many others..
 

Simplest solution will be to use readymade buck converters (several components mounted on a small PCB without any transformer; there will be no input-output isolation) that can take 48V DC as input and output 12V. Most will happily give 1A. Conventional linear regulators with high input voltage will also work but they will waste too much power and I do not recommend them.
 
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