Hello,
I'm exploring the possibility of using the BQ24295 as the battery charger/boost converter combo for a single-cell Li-Ion battery powered device. As far as I understand that is one of it's primary applications, but I wanted to check it meets my criteria/expected operation.
- Should charge Li-Ion cell when USB power connected, while also providing a ~5V output to the rest of the system
- When no USB power is disconnected, the IC should seamlessly switch to provide 5V to the system sourced from the battery
I have a few other more pin-specific questions;
- I am a little confused around how to use the OTG pin. Am I correct in thinking this should be pulled high to enable the PMID output when USB power is disconnected? If so, where should this be connected to ensure that process is automatic? SYS? BAT?
- Can the thermal resistor connected to the TS pin be an NTC thermistor of a Lithium-ion cell?
Lastly, I was looking to use a fuel-gauge alongside the charger to track battery charge state. Is there anything I shoudl consider if I want to use the BQ27220YZFR between the charger and the battery? It seems this might have it's own connection for an NTC thermistor, should this be used instead of the one on the TS pin mentioned above?
If there are other monolithic parts (around the same combined cost) that do charging, boost, and monitoring then I'd also love to hear about them.
Thanks,
Craig