Other Parts Discussed in Thread: TPS63000, BQ25620
Hello,
We need a baterry charger solution for an IOT device. The requirements are:
- We use Li-Ion rechargable battery 1s - 3,7V (like 18650 cell)
- Charger chip would provide the system output for the rest of the electronics.
- The charger has to have an I2C port so HOST MCU can get the state of the battery like voltage, charging state... basic parameters...etc
- Ideally charger would accept Adapter Voltages up to 40V but if not possible we can use Buck to feed it with 5V instead, but that would be another switching circuit on board from 40 to 5V for the charger, so the first option is preferred. (again only if possible)
- We need SYS output to be 3,3V and seamlessly switch system running from battery or from external supply.
- SYS output should withstand min 3A sync .
- We need above 3,3V to be set/selected by hardware default (probably with resistors) without using HOST MCU to set commands and registers.
- We need the SYS output of 3.3V to be buck/boost type, so 3,3V would stay regardless of external supply presence or battery dropping down to 2.7V
First chip that caught our eye is BQ25798 but since there are so many we would like to get professional help from TI in selecting the right component. Maybe we are looking at wrong family or there is simpler/better/cheaper solution ?
Please advise.
Best Regards
Dejan Spasovski
