BQ2031 Status: ACTIVE

Switch-mode Lead-Acid Battery Charger with User-Selectable Charge Algorithms

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Datasheet

Lead-Acid Fast-Charge IC (bq2031.pdf, 364 KB)
05 Sep 1999 Download

	BQ2031
# Series Cells	Multiple
Charge Current(Max)(A)	>2
Charge Status Outputs	3
Control Topology	Switchmode
Switching Frequency(kHz)	100
Primary Charge Termination Method	Maximum Voltage, (-)d2V, Minimum Current
Pin/Package	16PDIP,16SOIC
Vin(Max)(V)	7
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

UC3909: Switch-mode Lead-Acid Battery Charger with Differential Current Sense
UC3906: Linear Lead-Acid Battery Charger
BQ24702: Multi-Chemistry Battery Charge Controller and System Power Selector

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Product Information

Features

Conforms to battery manufacturers' charge recommendations for cyclic and float charge
Pin-selectable charge algorithms

Pin-selectable charge termination by maximum voltage, ²V, minimum current, and maximum time
Pre-charge qualification detects shorted, opened, or damaged cells and conditions battery
Charging continuously qualified by temperature and voltage limits
Internal temperature-compensated voltage reference
Pulse-width modulation control

Direct LED control outputs display charge status and fault conditions

Description

The bq2031 Lead-Acid Fast Charge IC is designed to optimize charging of lead-acid chemistry batteries. A flexible pulse-width modulation regulator allows the bq2031 to control constant-voltage, constant-current, or pulsed-current charging. The regulator frequency is set by an external capacitor for design flexibility. The switch-mode design keeps power dissipation to a minimum for high charge current applications.

A charge cycle begins when power is applied or the battery is replaced. For safety, charging is inhibited until the battery voltage is within configured limits. If the battery voltage is less than the low-voltage threshold, the bq2031 provides trickle-currentcharging until the voltage rises into the allowed range or an internal timer runs out and places the bq2031 in a Fault condition. This procedure prevents high-current charging of cells that are possibly damaged or reversed. Charging is inhibited anytime the temperature of the battery is outside the configurable, allowed range. All voltage thresholds are temperature-compensated.

The bq2031 terminates fast (bulk) charging based on the following:

Maximum voltage

Second difference of cell voltage (

²V)

Minimum current (in constant-voltage charging)

Maximum time-out (MTO)

After bulk charging, the bq2031 provides temperature-compensated maintenance (float) charging to maintain battery capacity.

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
BQ2031PN-A5	ACTIVE	-20 to 70	3.50 \| 100u	PDIP (N) \| 16	View	25 \| TUBE
BQ2031PN-A5E4	ACTIVE	-20 to 70	3.50 \| 100u	PDIP (N) \| 16	View	25 \| TUBE
BQ2031SN-A5	ACTIVE	-20 to 70	3.50 \| 100u	SOIC (D) \| 16	View	40 \| TUBE
BQ2031SN-A5G4	ACTIVE	-20 to 70	3.50 \| 100u	SOIC (D) \| 16	View	40 \| TUBE
BQ2031SN-A5TR	ACTIVE	-20 to 70	3.50 \| 100u	SOIC (D) \| 16	View	2500 \| LARGE T&R	Purchase Samples
BQ2031SN-A5TRG4	ACTIVE	-20 to 70	3.50 \| 100u	SOIC (D) \| 16	View	2500 \| 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
BQ2031PN-A5	As of 10:16 AM GMT, 19 Nov 2008			As of 10:16 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 17 Dec	4 Weeks	Americas	DigiKey	100
					Mouser Electronics	321
					Rochester Electronics	6
				Asia	WPI	61
				Europe	Spoerle	50
BQ2031PN-A5E4	As of 10:16 AM GMT, 19 Nov 2008			As of 10:16 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 17 Dec	4 Weeks	None Reported View Distributors
BQ2031SN-A5	As of 10:16 AM GMT, 19 Nov 2008			As of 10:16 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	1020 \| 16 Dec	12 Weeks	Americas	Avnet	250
		>10k \| 19 Jan			DigiKey	>1k
					Mouser Electronics	329
					Newark	>1k
				Europe	Avnet-SILICA	30
				Europe	Farnell	322
BQ2031SN-A5G4	As of 10:16 AM GMT, 19 Nov 2008			As of 10:16 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	1020 \| 16 Dec	12 Weeks	Europe	EBV Elektronik	20
	0*	>10k \| 19 Jan	12 Weeks
BQ2031SN-A5TR	As of 10:16 AM GMT, 19 Nov 2008			As of 10:16 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	151 \| 22 Dec	12 Weeks	Americas	Arrow	>1k
		153 \| 7 Jan
		152 \| 14 Jan
		152 \| 21 Jan
		>10k \| 23 Jan
BQ2031SN-A5TRG4	As of 10:16 AM GMT, 19 Nov 2008			As of 10:16 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	151 \| 22 Dec	12 Weeks	Europe	EBV Elektronik	>1k
		153 \| 7 Jan
		152 \| 14 Jan
		152 \| 21 Jan
		>10k \| 23 Jan
View all Distributors

* Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.

** 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
BQ2031PN-A5	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
BQ2031PN-A5E4	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
BQ2031SN-A5	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ2031SN-A5G4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ2031SN-A5TR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ2031SN-A5TRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	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

Datasheets

Lead-Acid Fast-Charge IC (bq2031.pdf, 364 KB)
05 Sep 1999 Download

Application Notes

U-511 Switch-Mode Power Conversion Using the bq2031 (slua019.htm, 8 KB)
05 Sep 1999 Abstract
U-510 Using the bq2031 to Charge Lead-Acid Batteries (slua017.htm, 8 KB)
05 Sep 1999 Abstract

View Application Notes for Battery Charge Management

User Guides

DV2031S2 Lead-Acid Charger Development System Control of On-Board p-FET (Rev. B) (sluu023b.pdf, 93 KB)
16 Mar 2007 Download
DV2031S1 Fast Charge Development System User's Guide (sluu022.htm, 8 KB)
05 Sep 1999 Abstract

View User Guides for Battery Charge Management

Tools & Software

Name	Part #	Company	Tool / Software Type
Temp Sense Designer Software	TEMPSENSE-SW	Texas Instruments	Analysis Software
Evaluation Module for Lead Acid, switchmode BQ2031	DV2031S2	Texas Instruments	Development Boards/EVMs

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