2025-03-03, 05:20 AM
Hi! You'll want to refer to the datasheet for the charge controller Tangara uses: https://ww1.microchip.com/downloads/en/D...02090E.pdf
Of note:
- Try not to exceed around 4V2 on the Vbat pin; it's unclear what the actual max voltage here is from a quick skim (maybe 5 volts?) but certainly keeping within the LiPo's expected range should be safe
- Below a Vbat of 3V3/3V4ish you'll lose regulation. Much below that and you'll start getting brownouts. This is not that big a deal for our LiPo bc by that voltage we've used most of the useful capacity anyway, but it might be different for whatever cells you're using
- You can use the NTC pin to disable charging complete as if there was a temperature fault. You probably want to do this, rather than trying to charge non-LiPo/Lion cells with the built in charge controller.
In general though I really would caution against having too much fun with the battery part of your device without having a good understanding of how battery systems in general work; the worst case with these things tends to be "you start a fire", which ideally we want to avoid.
Of note:
- Try not to exceed around 4V2 on the Vbat pin; it's unclear what the actual max voltage here is from a quick skim (maybe 5 volts?) but certainly keeping within the LiPo's expected range should be safe
- Below a Vbat of 3V3/3V4ish you'll lose regulation. Much below that and you'll start getting brownouts. This is not that big a deal for our LiPo bc by that voltage we've used most of the useful capacity anyway, but it might be different for whatever cells you're using
- You can use the NTC pin to disable charging complete as if there was a temperature fault. You probably want to do this, rather than trying to charge non-LiPo/Lion cells with the built in charge controller.
In general though I really would caution against having too much fun with the battery part of your device without having a good understanding of how battery systems in general work; the worst case with these things tends to be "you start a fire", which ideally we want to avoid.
