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BQ29412PWR Datasheet

  • BQ29412PWR

  • VOLTAGE PROTECTION FOR 2-, 3-, OR 4-CELL Li-Ion BATTERIES (2...

  • 10頁(yè)

  • TI

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bq29410, bq29411, bq29412
www.ti.com
SLUS669B 鈥?AUGUST 2005 鈥?REVISED DECEMBER 2005
VOLTAGE PROTECTION FOR 2-, 3-, OR 4-CELL Li-Ion BATTERIES
(2
nd
-LEVEL PROTECTION)
FEATURES
鈥?/div>
鈥?/div>
鈥?/div>
2-, 3-, or 4-Cell Secondary Protection
Low Power Consumption I
CC
< 2 碌A(chǔ)
[VCELL
(ALL)
< V
(PROTECT)
]
Fixed High Accuracy Overvoltage Protection
Threshold
鈥?bq29410 = 4.35 V
鈥?bq29411 = 4.40 V
鈥?bq29412 = 4.45 V
Programmable Delay Time of Detection
High Power Supply Ripple Rejection
Stable During Pulse Charge Operation
FUNCTION
Each cell in a multiple-cell pack is compared to an
internal reference voltage. If one cell reaches an
overvoltage condition, the protection sequence
begins. The bq2941x device starts charging an
external capacitor through the CD pin. When the CD
pin voltage reaches 1.2 V, the OUT pin changes from
a low level to a high level.
DCT PACKAGE
(TOP VIEW)
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
OUT
VDD
CD
VC4
1
2
3
4
8
7
6
5
VC1
VC2
VC3
GND
APPLICATIONS
2
nd
-Level Overvoltage Protection in Li-Ion
Battery Packs in:
鈥?Notebook Computers
鈥?Portable Instrumentation
鈥?Portable Equipment
PW PACKAGE
(TOP VIEW)
DESCRIPTION
The bq2941x is a secondary overvoltage protection
IC for 2-, 3-, or 4-cell lithium-ion battery packs that
incorporates a high-accuracy precision overvoltage
detection circuit. It includes a programmable delay
circuit for overvoltage detection time.
VC1
VC2
VC3
GND
1
2
3
4
8
7
6
5
OUT
VDD
CD
VC4
ORDERING INFORMATION
(1)
T
A
V
(PROTECT) (2)
4.35 V
鈥?0擄C to 110擄C
4.40 V
4.45 V
(1)
(2)
(3)
PACKAGE
(3)
MSOP (DCT3)
bq29410DCT3R
bq29411DCT3R
bq29412DCT3R
SYMBOL
CJG
CJH
CJJ
bq29410PW
bq29411PW
bq29412PW
PW
bq29410PWR
bq29411PWR
bq29412PWR
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.
Contact your local Texas Instruments representative or sales office for alternative overvoltage threshold options.
The "R" suffix indicates tape-and-reel packaging.
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 漏 2005, Texas Instruments Incorporated

BQ29412PWR 產(chǎn)品屬性

  • 1

  • 集成電路 (IC)

  • PMIC - 電池管理

  • -

  • 過(guò)壓/欠壓保護(hù)

  • 鋰離子（Li-Ion）

  • 4 V ~ 25 V

  • -40°C ~ 110°C

  • 表面貼裝

  • 8-TSSOP（0.173"，4.40mm 寬）

  • 8-TSSOP

  • Digi-Reel®

  • 296-31473-6

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