BQ29311 Status: ACTIVE

3-, 4-Cell Lithium-Ion Protection IC for Use With BQ2083/5

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Datasheet

bq29311 - Three- and 4-Cell Lithium-Ion or Lithium-Polymer Battery Protection IC (Rev. D) (PDF 450 KB) 4558 views
19 Sep 2002

	BQ29311
Cells Protected	3, 4
Protection FETs	External
Shutdown Current(uA)	1
Pin/Package	24TSSOP
Approx. Price (US$)	1.00 \| 1ku
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

BQ29330: Two, Three and Four Cell Lithium or Lithium-Polymer Battery Protection AFE
BQ29312: Two, Three and Four Cell Lithium or Lithium-Polymer Battery Protection AFE
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TPS62110: Adjustable, 1.5-A, 17-V Vin Step-Down Converter in QFN-16
TLV431A: Low Voltage Adjustable Precision Shunt Regulator

Product Information

Features

3- or 4-Cell Series Protection Control
Autonomous Overcurrent and Short Circuit Protection
Provides Individual Cell Voltages to Battery Management Host
Integrated Cell Balancing Control
I²C Compatible User Interface Allows Access to Battery Information
User Control to Initiate Protection
Integrated 3.3-V 25-mA LDO
Programmable Shutdown and Brownout Control
Provides Drive for Three External FETs
Low Supply Current of 140 µA Typical
Programmable Threshold and Delay for Short Circuit Current Protection
Provides Drive for Three External FETs
Can Directly Interface With bq2083/5 for Complete Battery Management Solution
APPLICATIONS
- Notebook computer battery packs
- Test equipment

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 I²C 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 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 levels for charge and discharge, to set the overcurrent 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 I²C compatible interface. The maximum current is set by an external series resistor with an absolute maximum value of 10 mA discharge current per cell.

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
BQ29311PW	ACTIVE	-25 to 85	1.10 \| 1ku	TSSOP (PW) \| 24	View	60 \| TUBE
BQ29311PWG4	ACTIVE	-25 to 85	1.10 \| 1ku	TSSOP (PW) \| 24	View	60 \| TUBE
BQ29311PWR	ACTIVE	-25 to 85	1.00 \| 1ku	TSSOP (PW) \| 24	View	2000 \| LARGE T&R	Purchase Samples
BQ29311PWRG4	ACTIVE	-25 to 85	1.00 \| 1ku	TSSOP (PW) \| 24	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

	TI Inventory Status	Reported Distributor Inventory
BQ29311PW	As of 12:01 PM GMT, 03 Jul 2009	As of 12:01 PM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	4 Weeks	Americas	Avnet	936
			DigiKey	573
			Mouser Electronics	>1k
			Newark	>1k
			Rochester Electronics	>1k
		Asia	WPI	2
		Europe	Spoerle	180
BQ29311PWG4	As of 12:01 PM GMT, 03 Jul 2009	As of 12:01 PM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	4 Weeks	Americas	DigiKey	Available
	4 Weeks	Americas	Mouser Electronics	>1k
BQ29311PWR	As of 12:01 PM GMT, 03 Jul 2009	As of 12:01 PM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	14 Weeks	Americas	DigiKey	Available
		Americas	Rochester Electronics	>1k
		Asia	WPI	>1k
BQ29311PWRG4	As of 12:01 PM GMT, 03 Jul 2009	As of 12:01 PM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	14 Weeks	Americas	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
BQ29311PW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
BQ29311PWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
BQ29311PWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
BQ29311PWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-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 BQ29311

Part #	Name	Product Family	Comments
BQ29400	2nd Level Over Voltage Protection for 2, 3, or 4 Cell LiIon & LiPoly Batteries (2nd Lev Protection)	BATTERY MANAGEMENT - LITHIUM ION PROTECTION	Overvoltage Protection for 2-, 3-, or 4 Cell LiIon and LiPoly Batteries (2nd level Protection)
Customers Who Evaluated This Product Also Evaluated...
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BQ29311 Status: ACTIVE

3-, 4-Cell Lithium-Ion Protection IC for Use With BQ2083/5

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