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Texas Instruments
Texas Instruments

BQ29330 Datasheet

LITHIUM-POLYMER BATTERY PROTECTION AFE


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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-mSense
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
Page 1

www.DataSheet4U.com
bq29330
SLUS673A – SEPTEMBER 2005 – REVISED DECEMBER 2005
www.ti.com
DESCRIPTION (CONTINUED)
The bq29330 provides safety protection for overload, short circuit in charge, and short circuit in discharge
conditions and can also provide cell overvoltage, battery overvoltage and battery undervoltage protection with the
battery management host. In overload, short circuit in charge and short circuit in discharge conditions, the
bq29330 turns off the FET drive autonomously, depending on the internal configuration setting. The
communications interface allows the host to observe and control the status of the bq29330, enable cell
balancing, enter different power modes, set current protection levels, and set the blanking delay times.
Cell balancing of each cell can be performed via a cell bypass path integrated into the bq29330, which can be
enabled via the internal control register accessible via the I2C-compatible interface. The maximum bypass current
is set via an external series resistor and internal FET on resistance (typ. 400 ).
ORDERING INFORMATION(1)
TA
–40°C to 110°C
TSSOP(DBT) (2)
bq29330DBT
PACKAGE
QFN(RHB) (3)
bq29330RHB
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
Web site at www.ti.com.
(2) The bq29330 can be ordered in tape and reel by adding the suffix R to the orderable part number, i.e., bq29330DBTR, bq29330RHBR.
(3) PRELIMINARY PACKAGE OPTION: The QFN package is also made available in mini reel; add suffix T to the orderable number, i.e.,
bq29330RHBT
PACKAGE OPTION PIN DIAGRAMS
TSSOP PACKAGE
(TOP VIEW)
QFN PACKAGE
(TOP VIEW)
CELL-
CELL+
REG
VSS
XRST
SRN
SRP
VC5
VC4
VC3
VC2
VC1
BAT
CHG
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30 XALERT
29 SDATA
28 SCLK
27 NC
26 WDI
25 TOUT
24 LEDOUT
23 VSS
22 PMS
21 GPOD
20 ZVCHG
19 VCC
18 NC
17 PACK
16 DSG
XRST
SRN
SRP
VC5
VC4
VC3
VC2
VC1
32 31 30 29 28 27 26 25
1 24
2 23
3 22
4 21
5 20
6 19
7 18
8 17
9 10 11 12 13 14 15 16
NC
WDI
TOUT
LEDOUT
VSS
PMS
GPON
ZVCHG
2
Page 2

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bq29330
www.ti.com
SLUS673A – SEPTEMBER 2005 – REVISED DECEMBER 2005
TERMINAL FUNCTIONS
NAME
CELL–
CELL+
REG
VSS
XRST
SRN
SRP
VC5
VC4
VC3
VC2
VC1
BAT
CHG
DSG
PACK
VCC
ZVCHG
GPOD
PMS
LEDOUT
TOUT
WDI
SCLK
SDATA
XALERT
NC
TERMINAL
DBT NO.
1
2
3
4, 23
5
6
RHB NO.
28
29
30
4,32
1
2
73
84
95
10 6
11 7
12
13
14
16
17
19
20
21
22
24
25
26
28
29
30
15,18,27
8
10
11
13
14
16
17
18
19
21
22
23
25
26
27
9,12,15, 24,31
DESCRIPTION
Output of scaled value of the measured cell voltage.
Output of scaled value of the measured cell voltage.
Integrated 2.5-V regulator output
Power supply ground
Active-low output
Current sense terminal
Current sense positive terminal when charging relative to SRN; current sense negative
terminal when discharging relative to SRN
Sense voltage input terminal for most negative cell; balance current input for least positive
cell.
Sense voltage input terminal for least positive cell, balance current input for least positive cell,
and return balance current for third most positive cell.
Sense voltage input terminal for third most positive cell, balance current input for third most
positive cell, and return balance current for second most positive cell.
Sense voltage input terminal for second most positive cell, balance current input for second
most positive cell, and return balance current for most positive cell.
Sense voltage input terminal for most positive cell, balance current input for most positive cell,
and battery stack measurement input
Charge pump, charge N-CH FET gate drive
Charge pump, charge N-CH FET gate drive
Charge pump output, discharge N-CH FET gate drive
PACK positive terminal and alternative power source
Power supply voltage
Connect the precharge P-CH FET drive here
NCH FET open-drain output
Determines CHG output state on POR
3.3-V output for LED display power supply
Provides thermistor bias current
Digital input that provides the timing clock for the OC and SC delays and also acts as the
watchdog clock.
Open-drain serial interface clock with internal 10-kpullup to VREG
Open-drain bidirectional serial interface data with internal 10-kpullup to VREG
Open-drain output used to indicate status register changes. With internal 100-k
pullup to VREG
Not electrically connected to the IC
3
Page 3

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bq29330
SLUS673A – SEPTEMBER 2005 – REVISED DECEMBER 2005
FUNCTIONAL BLOCK DIAGRAM
PACK
PACK+
RZVCHG
GG VDD GG RST
C
REG
2nd
Protection
www.ti.com
32 kHz INPUT
FROM GG
GG INTERFACE
SDATA
GG INTERFACE
SCLK
ALERT TO GG
OPEN DRAIN
OUTPUT
PACK DSG
CHG
ZVCHG
VCC
REG
RST
PMS
NCH GATE
DRIVER
CHG_ON
DSG_ON
FET
LOGIC
ZVCHG_ON GATE DRIVER
3.3-V LDO
2.5-V LDO
POR
WDI
SDATA
SCLK
XALERT
GPOD
REGISTERS
STATUS
OUTPUT CTL
STATE CTL
FUNCTION CTL
CELL SEL
OLV
OLD
SCC
SCD
OPEN
DRAIN
OUTPUT
WATCHDOG
TIMER
SHIP_ON
SLEEP_ON
POWER
MODE
CIRCUIT
CELL
CELL1..4 SELECTION
SWITCHES
DELAY
0.975V
BAT/25
PACK/25
CELL VOLTAGE
TRANSLATION
OVERL-OAD
COMPARATOR
OVERCURRENT
SHORT CIRCUIT
COMPARATOR
SHORT_CIRCUIT
DRIVE
CONTROL
LEDOUT
BAT
VC1
VC2
VC3
VC4
VC5
C
LED
CELL+
CELL
C
CELL
R
TOUT THERM
GND
C
THERM
SRP
SRN
GG LED
INPUT
CELL 4
CELL 3
CELL 2
CELL 1
GG ANALOG
INPUT
GG TS
INPUT
THERMISTOR
R
SNS
4
Page 4
Part Number BQ29330
Manufactur Texas Instruments
Description LITHIUM-POLYMER BATTERY PROTECTION AFE
Total Page 26 Pages
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