●The bq20z40 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Track™ technology, is designed for battery-pack or in-system installation. The bq20z40 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 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 maximizes functionality and safety while minimizing external component count and cost in smart battery circuits.
●The Impedance Track™ technology continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. This enables the remaining capacity to be calculated with discharge rate, temperature, and cell aging that are all accounted for during each stage of every cycle.
● 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 to 4 Series Li-Ion and Li-Polymer Cells
● Powerful 8-Bit RISC CPU With Ultralow Power Modes
● Full Array of Programmable Protection Features
● Voltage, Current, and Temperature
● Satisfies JEITA Guidelines
● Added Flexibility to Handle More Complex Charging Profiles
● Lifetime Data Logging
● Supports SHA-1 Authentication
● Available in a 20-Pin TSSOP (PW) package
● APPLICATIONS
● Notebook PCs
● Medical and Test Equipment
● Portable Instrumentation
●Impedance Track is a trademark of Texas Instruments.
