BQ2954 Status: ACTIVE

Switch-mode Li-Ion Charge Controller

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Datasheet

Lithium Ion Charge Management IC with Integrated Switching Controller (bq2954.pdf, 374 KB)
05 Sep 1999 Download

	BQ2954
# Series Cells	Multiple
Charge Current(Max)(A)	>2
Charge Status Outputs	2
Control Topology	Switchmode
Switching Frequency(kHz)	100
Primary Charge Termination Method	Minimum Current
Pin/Package	16PDIP,16SOIC
Vin(Max)(V)	7
Battery Charge Voltage(V)	adjustable
	Samples
	Inventory

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BQ2000: Switch-mode Multi-Chemistry Battery Charger with Peak Voltage Detection Termination
BQ24105: Standalone Synchronous Switch-Mode Li-Ion Charger w/2A FET in QFN-20, 1 to 3 Cells
BQ24702: Multi-Chemistry Battery Charge Controller and System Power Selector
BQ77PL900: 5-10 cell Li-ion Battery protection & AFE

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Product Information

Features

Safe charge of Li-Ion battery packs
Pulse-width modulation control for current and voltage regulation
Programmable high-side/low-side current-sense
Fast charge terminated by selectable minimum current; safety backup termination at maximum time
Precharge qualification detects shorted or damaged cells and conditions battery
Charging continuously qualified by temperature and voltage limits
Direct LED control outputs to display charge status and fault conditions

Description

The bq2954 Li-Ion Charge-Management IC uses a flexible pulse-width modulation regulator to control voltage and current during charging. The regulator frequency is set by an external capacitor for design flexibility. The switch-mode design minimizes power dissipation.

For safety, the bq2954 inhibits fast charging until the battery voltage and temperature are within configured limits. If the battery voltage is less than the low-voltage threshold, the bq2954 provides low-current conditioning of the battery.

For charge qualification, the bq2954 uses an external thermistor to measure battery temperature. Charging begins when power is applied or the battery is inserted

The bq2954 charges a battery in two phases. First a constant-current phase replenishes approximately 70% of battery capacity. Then a voltage- regulation phase completes the battery charge.

The bq2954 provides status indications of all charger states and faults for accurate determination of the battery and charge-system conditions.

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
BQ2954PN	ACTIVE	0 to 70	2.50 \| 100u	PDIP (N) \| 16	View	25 \| TUBE
BQ2954PNE4	ACTIVE	0 to 70	2.50 \| 100u	PDIP (N) \| 16	View	25 \| TUBE
BQ2954SN	ACTIVE	0 to 70	2.50 \| 100u	SOIC (D) \| 16	View	40 \| TUBE
BQ2954SNG4	ACTIVE	0 to 70	2.50 \| 100u	SOIC (D) \| 16	View	40 \| TUBE
BQ2954SNTR	ACTIVE	0 to 70	2.50 \| 100u	SOIC (D) \| 16	View	2500 \| LARGE T&R	Purchase Samples
BQ2954SNTRG4	ACTIVE	0 to 70	2.50 \| 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
BQ2954PN	As of 10:11 AM GMT, 04 Dec 2008			As of 10:11 AM GMT, 04 Dec 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	494 \| 11 Dec	6 Weeks	Americas	Avnet	20
		>10k \| 12 Jan			DigiKey	83
					Mouser Electronics	161
					Rochester Electronics	>1k
BQ2954PNE4	As of 10:11 AM GMT, 04 Dec 2008			As of 10:11 AM GMT, 04 Dec 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	494 \| 11 Dec	6 Weeks	Americas	Mouser Electronics	238
	0*	>10k \| 12 Jan	6 Weeks
BQ2954SN	As of 10:11 AM GMT, 04 Dec 2008			As of 10:11 AM GMT, 04 Dec 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	6240 \| 11 Dec	4 Weeks	Americas	Arrow	520
		>10k \| 5 Feb			Avnet	>1k
					DigiKey	192
					Mouser Electronics	>1k
					Newark	174
					Rochester Electronics	>1k
				Asia	WPI	60
				Europe	Spoerle	120
BQ2954SNG4	As of 10:11 AM GMT, 04 Dec 2008			As of 10:11 AM GMT, 04 Dec 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	6240 \| 11 Dec	4 Weeks	Americas	Avnet	320
	0*	>10k \| 5 Feb	4 Weeks	Europe	EBV Elektronik	40
BQ2954SNTR	As of 10:11 AM GMT, 04 Dec 2008			As of 10:11 AM GMT, 04 Dec 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 11 Dec	4 Weeks	Americas	Arrow	>1k
BQ2954SNTRG4	As of 10:11 AM GMT, 04 Dec 2008			As of 10:11 AM GMT, 04 Dec 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 11 Dec	4 Weeks	Europe	EBV Elektronik	>1k
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
BQ2954PN	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
BQ2954PNE4	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
BQ2954SN	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ2954SNG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ2954SNTR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ2954SNTRG4	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

Lithium Ion Charge Management IC with Integrated Switching Controller (bq2954.pdf, 374 KB)
05 Sep 1999 Download

Application Notes

Using the bq2954 (slua447.htm, 8 KB)
02 Jan 2008 Abstract
Battery Charger Termination Issues With System Load Applied Across Battery (Rev. A) (slva166a.htm, 8 KB)
02 Oct 2006 Abstract
Battery Charger Termination Issues With System Load Applied Across Battery (slva166.htm, 8 KB)
21 Apr 2004 Abstract
Designed to Go: 20W Miniature Dual-Stage Fast Lithium-Ion Charger Using bq2954 (slua070.htm, 8 KB)
05 Sep 1999 Abstract

View Application Notes for Battery Charge Management

User Guides

DV2954S1H Li-Ion Charger Development System User Manual (sluu053.htm, 8 KB)
05 Sep 1999 Abstract
Li-Ion Charger Development System Control of On-Board PNP Switch-Mode Regulator (sluu005.htm, 8 KB)
05 Sep 1999 Abstract

View User Guides for Battery Charge Management

Tools & Software

Name	Part #	Company	Tool / Software Type
BQ2954 Evaluation Module for Li-Ion, switchmode, high-side current sensing	DV2954S1H	Texas Instruments	Development Boards/EVMs
BQ2954 Evaluation Module for Li-Ion, switchmode, low-side current sensing	DV2954S1L	Texas Instruments	Development Boards/EVMs

Alternative Products - Are similar to BQ2954
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Part #	Name	Comments
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Complementary Products - Can be used with BQ2954
Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
BQ77PL900	5-10 cell Li-ion Battery protection & AFE	BATTERY MANAGEMENT-LITHIUM ION PROTECTION	TI customers also evaluated this product.

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