bq20z40-R1

Not Recommended for New Designs bq20z40-R1 www.ti.com SLUS993A – DECEMBER 2009 – REVISED MARCH 2011 SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™ TECHNOLOGY FOR USE WITH THE bq29330 Check for Samples: bq20z40-R1 FEATURES 1 2 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 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 repo...