BQ28Z620 Impedance Track™ Gas Gauge and Protection Solution for 1-Series to 2-Series Cell Li-Ion Battery Packs

1 Features

Autonomous battery charging control, using a dedicated MASTER mode I²C interface
400-kHz I²C bus communications interface, including a 1.2-V logic level for high-speed programming and data access
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 0.5-mΩ current sense resistor while capable of 1-mA current measurement
SHA-1 authentication responder for increased battery pack security
Compact 12-pin VSON package (DRZ)