You could use what I think TI calls a "narrow-range" power supply architecture.
Use a good USB boost converter to power the Pi. Power the boost converter off a lithium ion battery pack. Charge the pack using a buck/step-down charging circuit powered off a suitable "wall-wart." AC power supply and charger need enough headroom to deal with conversion losses and deliver plenty of power to the Pi.
For example: 12v 20W output SMPS AC-DC supply (like an ultrabook power brick or similar), 4A LiIon charger, USB QC boost module (Quick Charge can output up to 18W, which provides plenty of headroom for spikes from a Pi).
A similar architecture would work with a big linear regulator instead of the boost module, if you want to worry about that.
This boost module has good stable output at 5V ~2A. I don't know about noise though.
Use a good USB boost converter to power the Pi. Power the boost converter off a lithium ion battery pack. Charge the pack using a buck/step-down charging circuit powered off a suitable "wall-wart." AC power supply and charger need enough headroom to deal with conversion losses and deliver plenty of power to the Pi.
For example: 12v 20W output SMPS AC-DC supply (like an ultrabook power brick or similar), 4A LiIon charger, USB QC boost module (Quick Charge can output up to 18W, which provides plenty of headroom for spikes from a Pi).
A similar architecture would work with a big linear regulator instead of the boost module, if you want to worry about that.
This boost module has good stable output at 5V ~2A. I don't know about noise though.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.