6V to 3.3V converter for car camera

Thread Starter

cutepoison

Joined Apr 23, 2022
4
My car is providing 6V to OEM camera. I have a much better camera that works on 3.3V.
I bought a $1 Mini360 buck converter and have set it to 3.3V. Everything is working but the image has a slight flicker to it.
Reading online, one of the causes can be switching conversion that buck converter does and I am thinking of replacing it with a linear voltage DC-DC step down instead. This may or may not be an issue due to using buck converter but I want to elimate power first before replacing the video cable.

People seem to recommend AMS1117 3.3V but I think it will heat up a lot and I wont be able to just tape it in the wiring. What are the alternatives to this? Will something like this work as an alternative to AMS1117 https://www.aliexpress.com/item/33054550198.html?
Any other similar recommendations?

There is also this but shouldnt this massively heat up? https://www.aliexpress.com/item/1005002440904086.html
 
Last edited:

BobTPH

Joined Jun 5, 2013
5,283
Any linear supply going from 6V to 3.3V produces the same amount of heat. How much current does the camera require?

Bob
 

ronsimpson

Joined Oct 7, 2019
2,172
The linear regulators will heat by (3V x .5A=1.5 watts) which is too much for what is in the two links.
1650813887798.png
My thoughts on the Mini-360. You probably need more capacitor on the input and the output.
1650813952234.png
Try putting a 100uF electrolytic cap on the input and maybe another on the output.
 
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