BQ28Z610DRZR

The bq28z610 device is a highly integrated and precise 1 - 2 series - connected battery fuel gauge and protection solution, featuring autonomous charger control and charge equalization functions. The bq28z610 device can achieve autonomous charging control by broadcasting the charging current and voltage information in the master - mode I²C, thereby reducing the software overhead typically generated in the system's main controller. The bq28z610 device offers a fully integrated battery - pack - based solution, which has a flash - programmable custom Reduced Instruction Set CPU (RISC), safety protection, and authentication functions. It is suitable for 1 - 2 series - connected lithium - ion and lithium - polymer battery packs. The bq28z610 fuel gauge communicates via an I²C - compatible interface and perfectly integrates an ultra - low - power high - speed bqBMP processor, high - precision analog measurement functions, integrated flash memory, a large number of peripherals and communication ports, an N - channel FET driver, and an SHA - 1 authentication conversion responder into a complete high - performance battery management solution. The bq28z610 device provides a wide range of battery and system safety functions, including over - discharge current protection for the battery, charging short - circuit and discharging short - circuit protection, FET protection for the N - channel FET, an internal AFE watchdog, and battery equalization functions. More protection features, such as over - voltage, under - voltage, and over - temperature protection, can be added to the device through firmware.

Applications

• Tablets
• Portable and wearable health devices
• Portable audio devices

Key features

• Dedicated host-mode I²C interface for autonomous battery charge control
• Internal bypass cell balancing for optimized battery health
• High-side protection N-channel FET driver, allowing serial bus communication during fault conditions
• Programmable protection for voltage, current, and temperature
• Analog front end with dual independent ADCs for synchronous current and voltage sampling
• High-accuracy coulomb counter with input offset error <1μV (typical)
• Supports current sense resistors as low as 1mΩ with 1mA current measurement capability
• Battery Trip Point (BTP) support for Windows integration
• SHA-1 authentication responder for enhanced battery pack security
• 400kHz I²C bus interface for high-speed programming and data access
• Compact 12-pin VSON (DRZ) package