1 Features
1• Fully Integrated 1-Series, 2-Series, 3-Series, and
4-Series Li-Ion or Li-Polymer Cell Battery Pack
Manager and Protection
• Next-Generation Patented Impedance Track™
Technology Accurately Measures Available
Charge in Li-Ion and Li-Polymer Batteries
• High Side N-CH Protection FET Drive
• Integrated Cell Balancing While Charging or At
Rest
• Full Array of Programmable Protection Features
– Voltage
– Current
– Temperature
– Charge Timeout
– CHG/DSG FETs
– AFE
• Sophisticated Charge Algorithms
– JEITA
– Enhanced Charging
– Adaptive Charging
– Cell Balancing
• Supports TURBO BOOST Mode
• Supports Battery Trip Point (BTP)
• Diagnostic Lifetime Data Monitor and Black Box
Recorder
• LED Display
• Supports Two-Wire SMBus v1.1 Interface
• SHA-1 Authentication
• Compact Package: 32-Lead QFN (RSM)

2 Applications
• Notebook/Netbook PCs
• Medical and Test Equipment
• Portable Instrumentation

3 Description
The bq40z50-R1 device, incorporating patented
Impedance Track™ technology, is a fully integrated,
single-chip, pack-based solution that provides a rich array of features for gas gauging, protection, and
authentication for 1-series, 2-series, 3-series, and 4-
series cell Li-Ion and Li-Polymer battery packs.
Using its integrated high-performance analog
peripherals, the bq40z50-R1 device measures and
maintains an accurate record of available capacity,
voltage, current, temperature, and other critical
parameters in Li-Ion or Li-Polymer batteries, and
reports this information to the system host controller
over an SMBus v1.1 compatible interface.