1 Features
• Autonomous battery charging control, using a
dedicated MASTER mode I2C interface
• Cell balancing with an internal bypass to optimize
battery health
• A high-side protection N-CH FET drive enables
serial bus communication during fault conditions
• Programmable protection levels for voltage,
current, and temperature
• Analog front-end with two independent ADCs
– Support for simultaneous current and voltage
sampling
– High-accuracy coulomb counter with input
offset error < 1 μV (typical)
• Supports down to 1-mΩ current sense resistor
while capable of 1-mA current measurement
• Supports battery trip point (BTP) function for
Windows® integration
• SHA-1 authentication responder for increased
battery pack security
• 400-kHz I2C bus communications interface for
high-speed programming and data access
• Compact 12-pin VSON package (DRZ)

2 Applications
• Tablet computing
• Portable and wearable health devices
• Portable audio devices
– Wireless (Bluetooth®) speakers

3 Description
The Texas Instruments BQ28Z610-R1 device is
a highly integrated, accurate, 1-series to 2-series
cell gas gauge and protection solution, providing
autonomous charger control and cell balancing.
The BQ28Z610-R1 device enables autonomous
charge control through Master Mode I2C broadcasts
of charging current and voltage information,
eliminating software overhead that is typically incurred
by the system's host controller.
The BQ28Z610-R1 device provides a fully integrated
pack-based solution with a flash programmable
custom reduced instruction-set CPU (RISC), safety
protection, and authentication for 1- to 2-series cell
Li-ion and Li-polymer battery packs.
The BQ28Z610-R1 gas gauge communicates via
an I2C compatible interface and combines an
ultra-low-power, high-speed TI BQBMP processor,
high-accuracy analog measurement capabilities,
integrated flash memory, an array of peripheral
and communication ports, an N-CH FET drive, and
a SHA-1 Authentication transform responder into
a complete, high-performance battery management
solution.