The bq20z655 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Track technology, is a single IC solution designed for battery-pack or in-system installation. The bq20z655 measures and maintains an accurate record of available charge in Li-Ion or Li-Polymer batteries using its integrated high-performance analog peripherals. The bq20z655 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-communication bus. Together with the integrated analog front-end (AFE) short-circuit and overload protection, the bq20z655 maximizes functionality and safety while minimizing external component count, cost, and size in smart battery circuits.
The implemented Impedance Track gas gauging 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 with high accuracy.
Feature
- 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
- Powerful 8-Bit RISC CPU with Ultralow Power Modes
- Charge Enable (CE) Affects the Normal Operation on the Charge FET when
the Battery Is in Charge/Relax Mode - Full Array of Programmable Protection Features
- Voltage, Current, and Temperature
- Satisfies JEITA Guidelines
- Added Flexibility to Handle More Complex Charging Profiles
- Lifetime Data Logging
- Drives 3, 4, or 5 Segment Liquid Crystal Display and LED for
Battery-Pack Conditions - Supports SHA-1 Authentication
- Complete Battery Protection and Gas Gauge Solution in One Package
- Available in a 44-Pin TSSOP (DBT) Package
