BQ2004 Status: ACTIVE

Switch-mode NiCd/NiMH Battery Charger w/Negative dV, Peak Voltage Detection, dT/dt Termination

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Datasheet

Fast-Charge IC (Rev. B) (bq2004.pdf, 492 KB)
19 Apr 2005 Download

	BQ2004
# Series Cells	Multiple
Charge Current(Max)(A)	>2
Charge Status Outputs	2
Control Topology	Switchmode
Switching Frequency(kHz)	300
Primary Charge Termination Method	(-)dV, PVD, dT/dt
Pin/Package	16PDIP,16SOIC
Vin(Max)(V)	7
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

BQ2002: NiCd/NiMH Charge Controller with Negative dV and Peak Voltage Detection Termination
BQ2000: Switch-mode Multi-Chemistry Battery Charger with Peak Voltage Detection Termination
BQ2005: Switch-mode NiCd/NiMH Battery Charger for Sequential Charging Of Dual Battery Packs
TPS54331: 3A, 28V Input Step Down SWIFT(tm) DC/DC Converter with Eco-mode(tm)

Product Information

Features

Fast charge and conditioning of nickel cadmium or nickel-metal hydride batteries
Hysteretic PWM switch-mode current regulation or gated control of an external regulator
Easily integrated into systems or used as a stand-alone charger
Pre-charge qualification of temperature and voltage
Configurable, direct LED outputs display battery and charge status
Fast-charge termination by V, maximum voltage, maximum temperature, and maximum time
Optional top-off charge and pulsed current maintenance charging
Logic-level controlled low-power mode (< 5µA standby current)

Description

The bq2004 Fast Charge IC provides comprehensive fast charge control functions together with high-speed switching power control circuitry on a monolithic CMOS device.

Integration of closed-loop current control circuitry allows the bq2004 to be the basis of a cost-effective solution for stand-alone and system integrated chargers for batteries of one or more cells.

Switch-activated discharge-before charge allows bq2004-based chargers to support battery conditioning and capacity determination.

High-efficiency power conversion is accomplished using the bq2004 as a hysteretic PWM controller for switch-mode regulation of the charging current. The bq2004 may alternatively be used to gate an externally regulated charging current.

Fast charge may begin on application of the charging supply, replacement of the battery, or switch depression. For safety, fast charge is inhibited unless/until the battery temperature and voltage are within configured limits.

Temperature, voltage, and time are monitored throughout fast charge. Fast charge is terminated by any of the following:

Rate of temperature time (t)
Peak voltage detection (PVD)
Negative delta voltage (-V)
Maximum voltage
Maximum temperature
Maximum time

After fast charge, optional top-off and pulsed current maintenance phases are available.

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
BQ2004PN	ACTIVE	-20 to 70	2.50 \| 100u	PDIP (N) \| 16	View	25 \| TUBE
BQ2004PNG4	ACTIVE	-20 to 70	2.50 \| 100u	PDIP (N) \| 16	View	25 \| TUBE
BQ2004SN	ACTIVE	-20 to 70	2.50 \| 100u	SOIC (D) \| 16	View	40 \| TUBE
BQ2004SNG4	ACTIVE	-20 to 70	2.50 \| 100u	SOIC (D) \| 16	View	40 \| TUBE
BQ2004SNTR	ACTIVE	-20 to 70	2.50 \| 100u	SOIC (D) \| 16	View	2500 \| LARGE T&R	Purchase Samples
BQ2004SNTRG4	ACTIVE	-20 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
BQ2004PN	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*	6700 \| 26 Nov	4 Weeks	Americas	Avnet	170
		5910 \| 2 Dec			DigiKey	709
					Mouser Electronics	869
					Newark	489
					Rochester Electronics	>1k
				Asia	WPI	60
				Europe	EBV Elektronik	25
BQ2004PNG4	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*	6700 \| 26 Nov	4 Weeks	Americas	Mouser Electronics	115
	0*	5910 \| 2 Dec	4 Weeks
BQ2004SN	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*	2320 \| 26 Nov	4 Weeks	Americas	Arrow	>1k
		7068 \| 1 Dec			Avnet	>1k
		4617 \| 17 Dec			DigiKey	473
					Mouser Electronics	535
					Newark	826
				Asia	WPI	70
				Europe	Arrow Northern Europe	80
					Arrow Southern Europe	720
					Farnell	504
					Spoerle	800
BQ2004SNG4	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*	2320 \| 26 Nov	4 Weeks	None Reported View Distributors
		7068 \| 1 Dec
		4617 \| 17 Dec
BQ2004SNTR	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 \| 26 Nov	4 Weeks	None Reported View Distributors
BQ2004SNTRG4	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 \| 26 Nov	4 Weeks	None Reported View Distributors
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
BQ2004PN	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type	View	View
BQ2004PNG4	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type	View	View
BQ2004SN	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ2004SNG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ2004SNTR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ2004SNTRG4	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 TI Recommends

Datasheets

Fast-Charge IC (Rev. B) (bq2004.pdf, 492 KB)
19 Apr 2005 Download

Application Notes

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
High-Side Current Sensing with Benchmarq's Fast-Charge Control ICs (slua066.htm, 8 KB)
05 Sep 1999 Abstract
Using NiMH and Li-Ion Batteries in Portable Applications (slua015.htm, 8 KB)
05 Sep 1999 Abstract

View Application Notes for Battery Charge Management

User Guides

bq2004 Selection Table (sluu230.pdf, 52 KB)
30 Aug 2005 Download
DV2004S1/ES1/HS1 Fast Charge Dev System Control of On-Board P-FET S-M Reg (Rev. A) (sluu016a.pdf, 2133 KB)
30 Aug 2002 Download
EV2014x Gas Gauge and Fast Charge Evaluation Board (sluu037.htm, 8 KB)
05 Sep 1999 Abstract
DV2004L3 Fast Charge Development System Control of F-M Linear Reg User's Guide (sluu015.htm, 9 KB)
05 Sep 1999 Abstract
DV2004L1 Fast Charge Development System Control of PNP Power Transistor (sluu014.htm, 9 KB)
05 Sep 1999 Abstract

View User Guides for Battery Charge Management

Tools & Software

Name	Part #	Company	Tool / Software Type
BQ2004 Evaluation Module for NiCd/NiMH, switchmode, up to 3A	DV2004S1	Texas Instruments	Development Boards/EVMs
BQ2004 Evaluation Module for NiCd/NiMH, linear	DV2004L1	Texas Instruments	Development Boards/EVMs

Alternative Products - Are similar to BQ2004
Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Comments
BQ2002	NiCd/NiMH Charge Controller with Negative dV and Peak Voltage Detection Termination	TI customers also evaluated this product.
BQ2000	Switch-mode Multi-Chemistry Battery Charger with Peak Voltage Detection Termination	TI customers also evaluated this product.
BQ2005	Switch-mode NiCd/NiMH Battery Charger for Sequential Charging Of Dual Battery Packs	TI customers also evaluated this product.

Complementary Products - Can be used with BQ2004
Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
TPS54331	3A, 28V Input Step Down SWIFT(tm) DC/DC Converter with Eco-mode(tm)	DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS	TI customers also evaluated this product.

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BQ2004 Status: ACTIVE

Switch-mode NiCd/NiMH Battery Charger w/Negative dV, Peak Voltage Detection, dT/dt Termination

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