Re: WFCO Camper Converter need help understanding KA3846 SMPS Controller

Hi Shane711
I have a WFCO -9875. When off load I can adjust to 13.60 volts (with Vr1). As soon as I put a battery the voltage drop to the battery level. If I leave it connected it it will charge the battery very slowly over many days then stabilize at 13.2v. When in my trailer the voltage keeps on reducing to the point that the fridge doesn't work anymore. Do you know which IC controls the amperage and voltage output ? Is this the mini controller or the KA3846. I have a new 9875 but would like to fix...