1 Features
1• Fully Integrated 2-Series, 3-Series, and 4-Series
Li-Ion or Li-Polymer Cell Battery Pack Manager
and Protection
• Advanced Compensated End-of-Discharge
Voltage (CEDV) Gauging
• High Side N-CH Protection FET Drive
• Integrated Pre-Charge FET
• Integrated Cell Balancing
• Low Power Modes
– Low Power: < 180 μA
– Sleep < 76 μA
• Full Array of Programmable Protection Features
– Voltage
– Current
– Temperature
• Sophisticated Charge Algorithms
– JEITA
– Enhanced Charging
– Adaptive Charging
• Supports Two-Wire SMBus v1.1 Interface
• SHA-1 Authentication
• Compact Package: 38-Lead TSSOP

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

3 Description
The Texas Instruments bq3050 Compensated End-
of-Discharge Voltage (CEDV) Gas Gauge and Battery
Pack Manager is a single-chip solution that provides a rich array of features for protection, authentication,
and data gathering for 2-series, 3-series, and 4-series
cell Li-Ion and Li-Polymer battery packs.
Using its integrated high-performance analog
peripherals, the bq3050 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.
The bq3050 provides software-based 1st-level and
2nd-level safety protection for overvoltage,
undervoltage, overtemperature, and overcharge conditions, as well as hardware-based protection for
overcurrent in discharge and short circuit in charge
and discharge conditions.
SHA-1 authentication with secure memory for
authentication keys enables identification of genuine
battery packs beyond any doubt.
The compact 38-lead TSSOP package minimizes
solution cost and size for smart batteries while providing maximum functionality and safety for
battery gauging applications.