bq29330
www.ti.com
SLUS673A – SEPTEMBER 2005 – REVISED DECEMBER 2005
2-, 3-, AND 4-CELL LITHIUM-ION OR
LITHIUM-POLYMER BATTERY PROTECTION AFE
FEATURES
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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
I
2
C Compatible User Interface Allows Access
to Battery Information
Programmable Threshold and Delay for
Overload Short Circuit in Discharge and Short
Circuit in Charge
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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
I
2
C-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
Discharge / Charge /
Precharge FETs
Fuse
Pack +
16 Dig GPIO & Peripherals
8 Dig GPIO or Analog GPI
2.5 V
Reset
32.768 kHz
LDO +
Reset
Nch FET Drive
(Charge Pumps)
Precharge
Control
Internal
Only
SMBus
HDQ
UART
Oscillator and PLL
Watchdog &
Protection Timing
System Interface
RAM Configuration, Status
and Control Registers
TOUT and LEDOUT
Power Support
Host Interface UART
& Data Management
System Interface
I2 C
6K x 22
Mask ROM
24K x 22 Program
Flash
T1
Standard Delta-Sigma A-to-D Converter
Analog Output Drive
Integrating Delta-Sigma A-to-D Converter
Pack
–
2-Tier Overcurrent
Protection
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
Cell, Bat and Pack
Voltage Translation
2K Bytes of
Data Flash
2K Bytes
of RAM
Cell Balancing Drive
TI [ TEXAS INSTRUMENTS ]
