BQ29400 Status: ACTIVE

2nd Level Over Voltage Protection for 2, 3, or 4 Cell LiIon & LiPoly Batteries (2nd Lev Protection)

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Datasheet

Voltage Protection for 2-,3-or,4-Cell Lion Batteries (Rev. C) (PDF 341 KB)
26 Sep 2005

	BQ29400	BQ29401	BQ29405
Cells Protected	2, 3, 4	2, 3, 4	2, 3, 4
Overvoltage Threshold(V)	4.35	4.45	4.65
Protection FETs	External	External	External
Shutdown Current(uA)	2	2	2
Pin/Package	8SM8, 8TSSOP	8SM8, 8TSSOP	8SM8
Approx. Price (US$)	0.42 \| 1ku	0.40 \| 1ku	0.55 \| 1ku
	Samples	Samples	Samples
	Inventory	Inventory	Inventory

Customers Who Evaluated This Product Also Evaluated

BQ29330: Two, Three and Four Cell Lithium or Lithium-Polymer Battery Protection AFE
BQ29419: Voltage Protection for 2, 3, or 4 Cell Li-Ion Batteries
BQ77PL900: 5-10 cell Li-ion Battery protection & AFE
BQ2060A: Multi-Chemistry SBS 1.1 Compliant Gas Gauge With 5 LED Drivers, Additional Battery Mgmt Control
BQ27541: Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration

More Related Products

Product Information

Features

2-, 3-, or 4-Cell Secondary Protection
Low Power Consumption I_CC < 2 µA [VCELL_(ALL) <V_(PROTECT)]
High Accuracy Over Sense Voltage:
- bq29400: 4.35 V ±25 mV
- bq29400A: 4.40 V ±25 mV
- bq29401: 4.45 V ±25 mV
- bq29405: 4.65 V ±25 mV
Prefixed Protection Threshold Voltage
Programmable Delay Time
High Power Supply Ripple Rejection
Stable During Pulse Charge Operation
APPLICATIONS
- 2^nd Level Protection in Lion Battery Packs in
  - Notebook PCs
  - Portable Instrumentation
  - Medical and Test Equipment

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.

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.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools		Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
BQ29400ADCT3	ACTIVE	-25 to 85	0.55 \| 1ku	SM8 (DCT) \| 8		3000 \| LARGE T&R	Purchase Samples
BQ29400ADCT3E6	ACTIVE	-25 to 85	0.55 \| 1ku	SM8 (DCT) \| 8		3000 \| LARGE T&R	Purchase Samples
BQ29400ADCT3R	ACTIVE	-25 to 85	0.55 \| 1ku	SM8 (DCT) \| 8		3000 \| LARGE T&R	Purchase Samples
BQ29400DCT3	ACTIVE		0.42 \| 1ku	SM8 (DCT) \| 8		3000 \| LARGE T&R	Purchase Samples
BQ29400DCT3E6	ACTIVE		0.42 \| 1ku	SM8 (DCT) \| 8		3000 \| LARGE T&R	Purchase Samples
BQ29400PW	ACTIVE	-25 to 85	0.46 \| 1ku	TSSOP (PW) \| 8	View	150 \| TUBE	Purchase Samples
BQ29400PWR	ACTIVE	-25 to 85	0.42 \| 1ku	TSSOP (PW) \| 8	View	2000 \| LARGE T&R	Purchase Samples

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 12:12 PM GMT, 22 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 20 WeeksBQ29400ADCT3
Americas	Rochester Electronics	>1k
TI Lead Time*: 20 WeeksBQ29400ADCT3E6
None Reported View Distributors
TI Lead Time*: 20 WeeksBQ29400DCT3
Europe	Avnet-SILICA	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 20 WeeksBQ29400DCT3E6
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksBQ29400PW
Americas	Arrow	500
	Avnet	8
	Newark	174
	Rochester Electronics	>1k
Asia	WPI	147
Worldwide	DigiKey	189
Worldwide	Mouser Electronics	65
TI Lead Time*: 20 WeeksBQ29400PWR
Americas	Rochester Electronics	>1k
Europe	Avnet-SILICA	>1k
Worldwide	DigiKey	Available
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
BQ29400ADCT3	Pb-Free (RoHS)	CU SNBI	Level-1-260C-UNLIM	View	View
BQ29400ADCT3E6	Pb-Free (RoHS)	CU SNBI	Level-1-260C-UNLIM	View	View
BQ29400DCT3	Pb-Free (RoHS)	CU SNBI	Level-1-260C-UNLIM	View	View
BQ29400DCT3E6	Pb-Free (RoHS)	CU SNBI	Level-1-260C-UNLIM	View	View
BQ29400PW	TBD	CU NIPDAU	Level-1-220C-UNLIM	View	View
BQ29400PWR	TBD	CU NIPDAU	Level-1-220C-UNLIM	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for BQ29400

Datasheet

Voltage Protection for 2-,3-or,4-Cell Lion Batteries (Rev. C) (PDF, 341 KB)
26 Sep 2005

Tools & Software

Name	Part #	Company	Tool / Software Type
BQ20Z80EVM-001 Impedance Track(TM) Fuel Gauge For LiIon Battery Packs	BQ20Z80EVM-001	Texas Instruments	Development Boards/EVMs

Part #	Name	Product Family	Comments
BQ2060A	Multi-Chemistry SBS 1.1 Compliant Gas Gauge With 5 LED Drivers, Additional Battery Mgmt Control	BATTERY MANAGEMENT - BATTERY FUEL GAUGES	Multi-Chemistry SBS 1.1 Compliant Gas Gauge with 5 LED Drivers, Additional Battery Mgmt Control
BQ2063	Li-Ion SBS 1.1 Compliant Gas Gauge With Protector Interface	BATTERY MANAGEMENT - BATTERY FUEL GAUGES	Li-Ion SBS 1.1 Compliant Gas Gauge with Protector Interface
BQ2050H	Li-Ion Gas Gauge With High-Speed 1-Wire (HDQ) Interface And 5 LED Drivers	BATTERY MANAGEMENT - BATTERY FUEL GAUGES	Li-Ion Gas Gauge with high speed 1-wire (HDQ) interface and 5 LED drivers
Customers Who Evaluated This Product Also Evaluated...
BQ29330	Two, Three and Four Cell Lithium or Lithium-Polymer Battery Protection AFE	BATTERY MANAGEMENT-LITHIUM ION PROTECTION	TI customers also evaluated this product.
BQ29419	Voltage Protection for 2, 3, or 4 Cell Li-Ion Batteries	BATTERY MANAGEMENT-LITHIUM ION PROTECTION	TI customers also evaluated this product.
BQ77PL900	5-10 cell Li-ion Battery protection & AFE	BATTERY MANAGEMENT-LITHIUM ION PROTECTION	TI customers also evaluated this product.
BQ29312A	Two, Three and Four Cell Lithium or Lithium-Polymer Battery Protection AFE	BATTERY MANAGEMENT-LITHIUM ION PROTECTION	TI customers also evaluated this product.
BQ29412	Secondary Over-Voltage Protection for 2-4 cell in series Li-Ion/Poly (4.45V)	BATTERY MANAGEMENT-LITHIUM ION PROTECTION	TI customers also evaluated this product.
BQ2060A	Multi-Chemistry SBS 1.1 Compliant Gas Gauge With 5 LED Drivers, Additional Battery Mgmt Control	BATTERY MANAGEMENT-BATTERY FUEL GAUGES	TI customers also evaluated this product.
BQ27541	Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration	BATTERY MANAGEMENT-BATTERY FUEL GAUGES	TI customers also evaluated this product.

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BQ29400 Status: ACTIVE

2nd Level Over Voltage Protection for 2, 3, or 4 Cell LiIon & LiPoly Batteries (2nd Lev Protection)

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Datasheet

Customers Who Evaluated This Product Also Evaluated

Product Information

Features

Description

Pricing / Packaging / CAD Design Tools / Samples

Inventory

Quality & Lead (Pb)-Free Data

Technical Documents

Datasheet

Tools & Software

Support and Community

Customer Tags

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