I am looking for any resources on how to construct a relatively high power (25A, 13.8V) voltage stabilizer (or voltage booster if you like) for my 13.8V powered ham radio.
The problem I try to resolve is powering the radio from both only batteries, and from car battery. So I would like to be protected against both voltage drop especially in first scenario and voltage spikes in the second one.
There is still a plenty of charge in a AGM 12 battery when the voltage is around 12,.4 volts but the radio PSU cuts off when the voltage drops that low.
I know that there are ready to buy solutions, but they are not very accessible in my part of the world, and I would like to at least know the principle they operate on :)
Many thanks in advance!
What about LM2587 in flyback regulation mode in parallel? Is it possible? I have only found a description of boost converter mode parallel application.
Great application note from National about SEPIC design: http://www.national.com/an/AN/AN-1484.pdf