●The bq20z70 SBS-compliant gas gauge IC, incorporating patented Impedance Track technology, is designed for battery-pack or in-system installation. The bq20z70 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals. The bq20z70 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, and minimize 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 remaining capacity to be calculated with discharge rate, temperature, and cell aging 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 Lifetime of the Battery
● Instant Accuracy No Learning Cycle Required
● Supports the Smart Battery Specification SBS V1.1
● Powerful 8-Bit RISC CPU With Ultra-Low Power Modes
● Works With the TI bq29330 Analog Front-End (AFE) Protection IC to Provide Complete Pack Electronics Solution
● Full Array of Programmable Protection Features
● Voltage, Current and Temperature
● Fully Integrated High Accurate Clock
● Flexible Configuration for 2 to 4 Series Li-Ion and Li-Polymer Cells
● Integrated Field Programmable FLASH Memory Eliminates the Need for External Configuration Memory
● Smart Battery Charger Control Feature
● Two 16-Bit Delta-Sigma Converter
● Accurate Voltage and Temperature Measurements
● Integrating Coloumb Counter for Charge Flow
● Better Than 0.65 nVh of Resolution
● Self-Calibrating
● Supports SHA-1 Authentication
● 20-Pin TSSOP (PW)
● APPLICATIONS
● Notebook PCs
● Medical and Test Equipment
● Portable Instrumentation
●IMPEDANCE TRACK Is a trademark of Texas Instruments
