Here’s my situation. I’ve been working with some low power (10-20W) class-D audio amplifiers intended for automotive use. I’m using them to make portable low power guitar “practice” amps. The 12V category has a lot of inexpensive choices. I have also been experimenting with powering these amplifiers with various 3 cell Li-ION or Li-Polymer cell packs. These output a max of about 12.6V on full charge (4.2 x 3), and about 9.9V ( 3.3 x 3) near the end of what I’d call their useful charge life. The problem is that most of these automotive class D amps start to lose their sound quality at about 10.5V. So I’m not getting the full use out of my 3 cell packs. I could go for a 4 cell pack, but that would raise the full charge voltage above the abs. max of most of these amplifiers.
So… I’d like to use some kind of circuit that would offer closer to 12V over the voltage input range I’ve described ( 9.9 - 12.6). I also would need about 2.2 “peak” amps, assuming 100% efficiency from my class-D amplifier, outputting 20 w into 4 ohms.
I’m considering using two of you U3V12F12 boards, and perhaps paralleling the outputs, if that is allowed. If not, maybe you have a higher current version? 3 Amps would be more than adequate. I am also concerned about the tolerance of this board to slight over-voltage, because a fully charged 3 cell LIPO pack will briefly output about 12.6 V. If that slight over-voltage isn’t OK, I possibly could consider making a switch-over circuit, where the amplifier would receive direct battery voltage until the input dropped to maybe 11.0V, and at that point somehow make the switch. But that sounds like difficult task, especially considering that the switch-over would have to happen without interrupting the audio.
Anyway, that’s my situation. I’ve been a customer for many years buying other things (mostly wixels), and was very happy to find my google search for 12V boost regulators find your product. Hopefully I can use it! 