Single-cell Li-ion charger with I²C programmability
The Texas Instruments BQ24261RGET is a single-cell lithium-ion battery charger that uses an I²C interface for programmable charge-current control, over-temperature and over-voltage fault protection, and a maximum charge current of 3 A.
I²C interface and charge control
The I²C interface lets the host microcontroller set the charge current programmably — the BQ24261RGET accepts a constant-current charge profile that is adjustable via the bus, rather than relying on a fixed resistor. Fault protection covers over-temperature and over-voltage conditions, which is typical for a single-cell charger intended for portable equipment where the battery is close to the charging IC.
Single-cell limitation and battery voltage
This part is designed for a single lithium-ion cell only — the battery pack voltage is 3.5 V nominal, and the supply voltage can go up to 13.2 V, so it can handle USB or higher-voltage input rails. The single-cell constraint is hard; the charger does not support series-cell balancing.
The BQ24261RGET carries an obsolete lifecycle status, meaning Texas Instruments has discontinued production and it is no longer available through the factory or distributors in new volumes.