The Texas Instruments bq28550-R1 battery gas gauge provides current and voltage protection, and secure, SHA-1/HMAC authentication for single-cell Lithium-Ion battery packs. Designed for battery-pack integration, the bq28550-R1 requires host microcontroller firmware support for implementation. A system processor communicates with the bq28550-R1 using a serial interface to obtain remaining battery capacity, system run-time predictions, and other critical battery information.
The bq28550-R1 gas gauge uses an accurate gas gauging algorithm to report the status of the cell. The gauge provides information such as state-of-charge (%), run-time-to-empty (min.), charge-time to full (min.), battery voltage (V), and pack temperature (°C).
The bq28550-R1 gas gauge also features integrated support for secure battery-pack authentication, using the SHA-1/HMAC authentication algorithm.
Feature
- A Comprehensive Single-Cell Li-Ion Battery Gas
Gauge and Protection Integrates All Essential
Functions:- Low-Side N-CH FET Protection Control
- JEITA/Enhanced Charging
- Authentication
- Records Battery Gas Gauge Information
- Protection Functions Help to Prevent:
- Short-Circuit
- Overcurrent Charge and Discharge
- Overvoltage Charge (Overcharge)
- Undervoltage (Over-Discharge)
- Firmware Control of Discharge FET
- SHA-1/HMAC Battery Authentication
- General Purpose I/O Configurable for One
of the Following:- CFET Control
- ALERT Output
- I2C Communications Interface with
SBS Command Set Operation - 12-pin, 2.50-mm × 4.00-mm SON Package
