Multi-chemistry charger with I²C control
The Texas Instruments BQ24745RHDT is a multi-chemistry battery charger controller supporting 2 to 4 series cells with a programmable constant-current charge up to 8.064 A. Communication with the host is over an I²C interface, allowing register-based configuration of charge parameters, status monitoring, and fault detection. The device integrates over-voltage fault protection and operates from a maximum supply of 24 V, making it suitable for notebook and portable equipment battery management.
Charge current and thermal design
The maximum charge current of 8.064 A is set via an external sense resistor and programmed through the I²C register — the actual current limit is the lower of the register value and the resistor's physical limit.
NRND lifecycle — plan for a replacement
For new designs, review the current TI battery charger portfolio for a drop-in or functionally equivalent alternative.