High Current Rail Splitter

Thread Starter

Grimrian

Joined Feb 9, 2020
2
Folks,

There are multiple rail splitters to be found on the web, but I have a hard time locating one which can deliver high current, say 5 amps. I like the idea of something based on regulators, such as the attached. Maybe the one with the transistors can be designed to handle high current? - any ideas?

spltter1.png
splitter2.png
 

ronsimpson

Joined Oct 7, 2019
447
I built a 60A 24V to 12V splitter for heavy trucks.
I would use a PWM and two MOSFETs. Run about 50% duty cycle. Adjust the duty cycle by looking at 1/2vin compared to vout.
At 5A and (what is your voltage) you will have too much heat, so use PWM.
I have to run to work now but this is not too hard.
 

ronsimpson

Joined Oct 7, 2019
447
That sounds like a 24V to 12V converter.
We called it a battery balancer and it worked in either direction. Now that I think about it there are battery balancers for charging stacked batteries. The small ones are linear but the big ones are switched to keep the power loss down.
1582134144719.png
example
 
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