48V to 12v to 5 v buck converter

Badstraw's picture

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Joined: Mar 09, 2020

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48V to 12v to 5 v buck converter
March 9, 2020 - 12:53pm

Hey! I’m planning to design a pcb for high power Leds, I want to use 12 V fans and a 5v microcontroller (esp32). I would like to make my own buck converter.
So the question is, how do I reduce the voltage from 48 to 12 v and then 5v for the microcontroller using the same 48V 7A power supply?

I was trying to use a 12v adapter and then decrease the voltage to 5v using an LM2596S but it didn’t work (I’m getting 12v on the output). I got the values from Webench power design tool for Texas Instruments.
Here’s the schematic

 

 

Badstraw's picture

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Joined: Mar 09, 2020

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I would really appreciate any
March 9, 2020 - 12:53pm

I would really appreciate any help.. 

Sourav Gupta's picture

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Joined: Feb 12, 2018

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Check the connection of
March 10, 2020 - 8:17am

Check the connection of lm2596. It should work.

Sourav Gupta's picture

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Joined: Feb 12, 2018

Replies: 220
Check the connection of
March 10, 2020 - 8:17am

Check the connection of lm2596. It should work.

Sourav Gupta's picture

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Joined: Feb 12, 2018

Replies: 220
Check the connection of
March 10, 2020 - 8:17am

Check the connection of lm2596. It should work.