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.