bq34z651 Datasheet | Texas Instruments

.ti. SLUSAL7 - AUGUST 2011 SBS 1.1-pliant Gas Gauge and Protection Enabled With Impedance Track™ and External Battery Heater Control Check for Samples: bq34z651 Features - 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 to 4-Series Li-Ion and Li-Polymer Cells - Battery Temperature Heater Control - 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 plex Charging Profiles - Lifetime Data Logging - Drives 3-, 4-, and 5-Segment LED Display for Battery-Pack Conditions - Supports SHA-1 Authentication - plete Battery Protection and Gas Gauge Solution in One Package - Available in a 44-Pin TSSOP (DBT) package APPLICATIONS - Notebook PCs - Medical and Test Equipment - Portable Instrumentation DESCRIPTION The bq34z651 SBS-pliant gas gauge and protection IC, incorporating patented Impedance Track™ technology, is a single IC solution designed for battery-pack or in-system installation. The bq34z651 measures and maintains an accurate record of available charge in Li-Ion or Li-Polymer batteries using its integrated high-performance analog peripherals. The bq34z651 monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack, which reports the information to the system host controller over a serial-munication bus. Together with the integrated analog front-end (AFE) short-circuit and overload protection, the bq34z651 maximizes functionality and safety while minimizing external ponent count, cost, and size in smart battery...