bq20z45-R1

Not Recommended For New Designs bq20z45-R1 www.ti.com SLUS992 – DECEMBER 2009 SBS 1.1-Compliant Gas Gauge and Protection Enabled With Impedance Track™ Check for Samples: bq20z45-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 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 Complete Battery Protection and Gas Gauge Solution in One Package Available in a 38-Pin TSSOP (DBT) package DESCRIPTION The bq20z45-R1 SBS-compliant gas gauge and protection IC is a single IC solution designed for battery-pack or in-system installation. The bq20z45-R1 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals, monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack as well and reports the information to the system host controller over a serial-communication bus. Together with the integrated analog front-end (AFE) short-circuit an...