BQ29330 Datasheet, PDF (1/26 Pages) Texas Instruments – 2-,3-,AND 4-CELL LITHIUM-ION OR LITHIUM-POLYMER BATTERY PROTECTION AFE

bq29330
www.ti.com
SLUS673A – SEPTEMBER 2005 – REVISED DECEMBER 2005
2-, 3-, AND 4-CELL LITHIUM-ION OR
LITHIUM-POLYMER BATTERY PROTECTION AFE
FEATURES
• 2- 3- or 4-Cell Series Protection Control
• Can Directly Interface with the bq803x-Based
Gas Gauge Family
• Watchdog and POR for the Host
• Provides Individual Cell Voltages and Battery
Voltage to Battery Management Host
• Capable of Operation With 5-mΩ Sense
Resistor Integrated Cell Balancing Drive
• I²C Compatible User Interface Allows Access
to Battery Information
• Programmable Threshold and Delay for
Overload Short Circuit in Discharge and Short
Circuit in Charge
• NMOS FET Drive for Charge and Discharge
FETs
• Host Control can Initiate Sleep and Ship
Power Modes
• Integrated 2.5-V, 16-mA LDO
• Integrated 3.3-V, 25-mA LDO
• Supply Voltage Range from 4.5 V to 28 V
• Low Supply Current of 100 µA Typical
APPLICATIONS
• Notebook Computers
• Medical and Test Equipment
• Instrumentation and Measurement Systems
DESCRIPTION
The bq29330 is a 2-, 3-, or 4-cell lithium-ion battery pack full-protection analog front end (AFE) IC that
incorporates a 2.5-V, 16-mA and 3.3-V, 25-mA low dropout regulator (LDO). The bq29330 also integrates an
I²C-compatible interface to extract battery parameters such as battery voltage, individual cell voltages, and
control output status. Other parameters such as current protection thresholds and delays can also be
programmed into the bq29330 to increase the flexibility of the battery management system.
SYSTEM DIAGRAM
Pack +
Fuse
Discharge / Charge /
Precharge FETs
SMBus
HDQ
UART
16 Dig GPIO & Peripherals
8 Dig GPIO or Analog GPI
Internal
Only
Oscillator and PLL
System Interface
2K Bytes of
Data Flash
2K Bytes
of RAM
6K x 22
Mask ROM
24K x 22 Program
Flash
Standard Delta-Sigma A-to-D Converter
Pack –
Integrating Delta-Sigma A-to-D Converter
2.5 V
Reset
32.768 kHz
I²C
T1
LDO + Nch FET Drive
Reset (Charge Pumps)
Watchdog &
Protection Timing
System Interface
RAM Configuration, Status
and Control Registers
TOUT and LEDOUT
Power Support
Analog Output Drive
2-Tier Overcurrent
Protection
Precharge
Control
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005, Texas Instruments Incorporated