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BQ29311PWR Datasheet

  • BQ29311PWR

  • THREE AND FOUR CELL LITHIUM ION OR LITHIUM POLYMER BATTERY P...

  • 241.55KB

  • 19頁(yè)

  • TI

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bq29311
SLUS487D 鈭?DECEMBER 2001 鈭?REVISED NOVEMBER 2003
THREE AND FOUR CELL LITHIUM ION OR
LITHIUM POLYMER BATTERY PROTECTION IC
FEATURES
D
3- or 4-Cell Series Protection Control
D
Autonomous Overcurrent and Short Circuit
Protection
DESCRIPTION
The bq29311 is a three- or four-cell lithium-ion battery
pack protection analog front end (AFE) IC that
incorporates a 3.3-V 25-mA low-dropout regulator
(LDO) and an I
2
C compatible interface to extract battery
parameters such as cell voltages and control output
status. Other parameters, such as overcurrent
protection threshold and delay, can also be
programmed into the bq29311 to increase the flexibility
of the battery management system.
The bq29311 provides safety protection in overcurrent,
short circuit, overvoltage, and undervoltage conditions
via control from the battery management host. In
overcurrent and short-circuit conditions the bq29311
can directly activate the FET drive as a secondary
protection level. The communications interface allows
the host to control and observe the current status of the
protection, to set overcurrent and overload levels, to set
the overcurrent and overload blanking delay time,
short-circuit threshold levels, and short-circuit blanking
delay time, and to program for the VREG shutdown
voltage and brownout-detection thresholds.
Each cell is balanced by a discharge path, which is
enabled by the internal control registers accessible
through the I
2
C compatible interface. The maximum
current is set by an external series resistor with an
absolute maximum value of 10 mA discharge current
per cell.
D
Provides Individual Cell Voltages to Battery
Management Host
D
Integrated Cell Balancing Control
D
I
2
C Compatible User Interface Allows Access
to Battery Information
D
User Control to Initiate Protection
D
Integrated 3.3-V 25-mA LDO
D
Programmable Shutdown and Brownout
Control
D
Provides Drive for Three External FETs
D
Low Supply Current of 140
碌A(chǔ)
Typical
D
Programmable Threshold and Delay for
Short-Circuit Current Protection
D
Provides Drive for Three External FETs
D
Can Directly Interface With bq2083/5 for
Complete Battery Management Solution
APPLICATIONS
D
Notebook Computer Battery Packs
D
Test Equipment
PIN ASSIGNMENTS
PW PACKAGE
(TOP VIEW)
ORDERING INFORMATION
TA
24
23
22
21
20
19
18
17
16
15
14
13
PACKAGED TSSOP
(PW)
bq29311PW
bq29311PWR(1)
VCC
VBAT
VC1
VC2
VC3
VC4
VC5
SR1
SR2
CNTL
GND
VCELL
1
2
3
4
5
6
7
8
9
10
11
12
VPACK
DSG
PCHG
CHG
LEDOUT
VREG
TOUT
XALERT
CLKIN
SDATA
SCLK
GND
鈭?5擄C to 85擄C
(1) R suffix indicates tape and reel.
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 Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright
錚?/div>
2001 鈭?2003, Texas Instruments Incorporated

BQ29311PWR 產(chǎn)品屬性

  • 2,000

  • 集成電路 (IC)

  • PMIC - 電池管理

  • -

  • 電池監(jiān)控器

  • 鋰離子（Li-Ion）、鋰聚合物（Li-Pol）

  • 6.5 V ~ 25 V

  • -25°C ~ 85°C

  • 表面貼裝

  • 24-TSSOP（0.173"，4.40mm 寬）

  • 24-TSSOP

  • 帶卷 (TR)

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