●DESCRIPTION
●The bq20z40-R1 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Track™ technology, is designed for battery-pack or in-system installation. The bq20z40-R1 measures and maintains an accurate record of available charge in Li-Ion or Li-Polymer batteries using its integrated high-performance analog peripherals. The bq20z40-R1 monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack, and reports the information to the system host controller over a serial-communication bus. It is designed to work with the bq29330 analog front-end (AFE) protection IC to maximize functionality and safety, while minimizing external component count and cost in smart battery circuits.
●FEATURES
●• Next Generation Patented Impedance Track™ Technology Accurately Measures Available Charge in Li-Ion and Li-Polymer Batteries
● – Better Than 1% Error Over the Lifetime of the Battery
●• Supports the Smart Battery Specification SBS V1.1
●• Flexible Configuration for 2-Series, 3-Series, and 4-Series Cell Li-Ion and Li-Polymer Batteries
●• Powerful 8-Bit RISC CPU With Ultralow Power Modes
●• Full Array of Programmable Protection Features
● – Voltage, Current, and Temperature
●• Complies with JEITA Guidelines
●• Added Flexibility to Handle More Complex Charging Profiles
●• Lifetime Data Logging
●• Supports SHA-1 Authentication
●• Available in 20-Pin TSSOP (PW) and 32-Pin QFN (RSM) Packages
●APPLICATIONS
●• Notebook PCs
●• Medical and Test Equipment
●• Portable Instrumentation
