Packaging information
| Package | Pins TSSOP (PW) | 20 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 70 | TUBE |
Features for the BQ20Z40-R1
- 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
Impedance Track is a trademark of Texas Instruments.
Description for the BQ20Z40-R1
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. Thebq20z40-R1 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, while minimizing external 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 the remaining capacity to be calculated with discharge rate, temperature, and cell aging, which are all accounted for during each stage of every cycle.