24V input, 1-4 cell Li-ion charger with I²C control
The Texas Instruments BQ24707ARGRR is a Li-Ion battery charger IC designed for portable systems requiring programmable charge parameters. It supports 1 to 4 series cells with a maximum battery pack voltage of 19.2V and accepts a supply rail up to 24V. Charge current is constant and programmable via the I²C interface, allowing firmware to adjust the charging profile for different battery chemistries and capacities without changing external resistors.
Integrated fault protection and thermal monitoring
On-chip fault protection covers over-current, over-voltage, and short-circuit conditions, reducing the need for external supervisory circuitry. The junction temperature range is rated from 0°C to 125°C, covering commercial and industrial ambient environments with adequate thermal margin. The 20-VFQFN package with exposed pad (3.5x3.5 mm) provides a low thermal resistance path to the PCB ground plane. The supplier device package is 20-VQFN (3.5x3.5). Surface-mount assembly is standard for this footprint.
The base product number is BQ24707, indicating this is a standard catalog device with established distribution support. No official successor or pin-compatible alternate is recorded in the manufacturer's lifecycle documentation.