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Image BQ29400DCT3E6
型号: BQ29400DCT3E6
厂商: Texas Instruments Texas Instruments
标准:
分类: 电源电源管理 IC
描述: battery management 2nd level over vltg protection
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BQ29400DCT3E6的详细信息

Manufacturer: Texas Instruments
Product Category: Battery Management
RoHS: Yes
Product Type: Battery Protection
Brand: Texas Instruments
Battery Type: Li-Ion
Output Voltage: 4.35 V
Operating Supply Voltage: 4 V to 25 V
Maximum Operating Temperature: + 85 C
Minimum Operating Temperature: - 25 C
Package / Case: SSOP-8
Packaging: Reel
Mounting Style: SMD/SMT
Series: BQ29400
Factory Pack Quantity: 3000
Unit Weight: 22.500 mg
Not Recommended for New Designs:  
bq29400, bq29400A, bq29405  
bq29400, bq29400A  
bq29401, bq29405  
www.ti.com  
SLUS568CJULY 2003REVISED SEPTEMBER 2005  
VOLTAGE PROTECTION FOR 2-, 3-, OR 4-CELL Lion BATTERIES  
nd  
(2 PROTECTION)  
FEATURES  
FUNCTION  
?
2-, 3-, or 4-Cell Secondary Protection  
Low Power Consumption ICC < 2 μA  
[VCELL(ALL) < V(PROTECT)  
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 bq2940x 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.  
?
]
?
High Accuracy Over Sense Voltage:  
– bq29400: 4.35 V ±25 mV  
– bq29400A: 4.40 V ±25 mV  
– bq29401: 4.45 V ±25 mV  
PW PACKAGE  
(TOP VIEW)  
– bq29405: 4.65 V ±25 mV  
?
?
?
?
Prefixed Protection Threshold Voltage  
Programmable Delay Time  
1
2
3
4
8
7
6
5
VC1  
VC2  
VC3  
GND  
OUT  
VDD  
CD  
High Power Supply Ripple Rejection  
Stable During Pulse Charge Operation  
VC4  
APPLICATIONS  
?
DCT PACKAGE  
(TOP VIEW)  
2nd Level Protection in Lion Battery Packs in  
– Notebook PCs  
1
2
3
4
8
OUT  
VC1  
– Portable Instrumentation  
– Medical and Test Equipment  
VDD  
CD  
VC2  
VC3  
7
6
5
VC4  
GND  
DESCRIPTION  
The bq29400, bq29400A, bq29401, and bq29405 are  
BiCMOS secondary protection ICs for 2-, 3-, or 4-cell  
Lithium-Ion battery packs that incorporate  
a
high-accuracy precision over voltage detection circuit.  
They include a programmable delay circuit for over  
voltage detection time.  
ORDERING INFORMATION  
PACKAGE  
SYMBOL  
TA  
V(PROTECT)  
MSSOP (DCT3)  
bq29400DCT3  
bq29400ADCT3  
bq29401DCT3  
bq29405DCT3  
TSSOP (PW)(1)  
bq29400PW  
Not Available  
bq29401PW  
Not Available  
SYMBOL  
4.35 V  
4.40 V  
4.45 V  
4.65 V  
CIQ  
CIT  
CIR  
CIS  
2400  
-
2401  
-
–25°C to 85°C  
(1) The bq29400, bq29400A, bq29401, and bq29405 are available taped and reeled. Add an R suffix to the device type (e.g.,  
bq29400PWR) to order tape and reel version.  
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.  
Copyright ? 2003–2005, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  

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