parallax power supply 7345ru parts PWM
My 7345 is not charging the coach batteries but does supply 12power to all accessories. The transformer, fan and relays work fine. Think i need a PWM circuit for it. Contacted PP tec support and th...
Forum Discussion
KJINTF wrote:
There might be another reason for what you're seeing - Just guessing
My converter is about 6 years old and has always acted that way. It can deliver high currents ... the only issue is that when it's doing this the voltage on it's terminals is below 13.8 volts (maybe up to 3/10 ths of a volt below at times). 3/10 ths is a lot when trying to bring up my AGM batteries during early stages of their charging.
My quick and dirty LED light sag test, IMHO, even more dramatically illustrates my 7345's sloppy, or non-existant, voltage control ability. Dropping 1/100 th of a volt lower with every LED I turn on seems strange to me - but this in itself is not really important. It's the few tenths of a volt drop during boost stage battery charging that is most important.
I wish someone else here would use a four-place digital voltmeter (a three-place meter does not have enough resolution) on their 7345's terminals while turning ON one LED light at a time to check how closely the output circuit can maintain output voltage under very small incrementally increasing LED currents.
