BQ24401 Status: ACTIVE

Switch-mode NiCd/NiMH Battery Charger with dT/dt Termination

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Datasheet

Programmable NiCd/NiMH Fast-Charge Management Device (bq24401.pdf, 374 KB)
27 Aug 2001 Download

	BQ24400	BQ24401
# Series Cells	Multiple	Multiple
Charge Current(Max)(A)	>2	>2
Charge Status Outputs	1	1
Control Topology	Switchmode	Switchmode
Switching Frequency(kHz)	500	500
Primary Charge Termination Method	PVD, Minimum Current	dT/dt, Minimum Current
Pin/Package	8SOIC,8TSSOP	8SOIC,8TSSOP
Vin(Max)(V)	7	7
	Samples	Samples
	Inventory	Inventory

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BQ24012: bqTINY(TM) Linear 1-cell Li-Ion Charger w/ 1-A FET, AC Present & Charge Enable in QFN-10
TPS79301: Single Output LDO, 200mA, Adj.(1.2 to 5.5V), High PSRR, Low Noise
TPS40200: Wide Input Non-Synchronous Buck DC/DC Controller
TPS65120: 5V/20mA(I/O), 4-CH high-accuracy Multi-Converter w/ 3.3V LDO for LCD Bias, 16 QFN

Product Information

Features

Safe management of fast charge for NiCd and NiMH
High-frequency switching controller for efficient and simple charger design
Pre-charge qualification for detecting shorted, damaged, or overheated cells
Fast-charge termination by t maximum temperature, and maximum charge time
Selectable top-off mode for achieving maximum capacity in NiMH batteries
Programmable trickle-charge mode for reviving deeply discharged batteries and for post-charge maintenance
Built-in battery removal and insertion detection
Sleep mode for low power consumption

Description

The bq24401 is a programmable, monolithic IC for fast-charge management of nickel cadmium (NiCd) and nickel metal-hydride (NiMH).

Depending on the chemistry, the bq24401 provides a number of charge termination criteria:

Rate of temperature rise,t (for NiCd and NiMH)
Maximum temperature
Maximum charge time

For safety, the bq24401 inhibits fast charge until the battery voltage and temperature are within user-defined limits. If the battery voltage is below the low-voltage threshold, the bq24401 uses trickle-charge to condition the battery. For NiMH batteries, the bq24401 provides an optional top-off charge to maximize the battery capacity.

The integrated high-frequency comparator allows the bq24401 to be the basis for a complete, high-efficiency power-conversion circuit.

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
BQ24401D	ACTIVE	-20 to 70	1.90 \| 100u	SOIC (D) \| 8	View	75 \| TUBE
BQ24401DG4	ACTIVE	-20 to 70	1.90 \| 100u	SOIC (D) \| 8	View	75 \| TUBE
BQ24401DR	ACTIVE	-20 to 70	1.90 \| 100u	SOIC (D) \| 8	View	2500 \| LARGE T&R	Purchase Samples
BQ24401DRG4	ACTIVE	-20 to 70	1.90 \| 100u	SOIC (D) \| 8	View	2500 \| LARGE T&R	Purchase Samples
BQ24401PW	ACTIVE	-20 to 70	1.90 \| 100u	TSSOP (PW) \| 8	View	150 \| TUBE
BQ24401PWG4	ACTIVE	-20 to 70	1.90 \| 100u	TSSOP (PW) \| 8	View	150 \| TUBE
BQ24401PWR	ACTIVE	-20 to 70	1.90 \| 100u	TSSOP (PW) \| 8	View	2000 \| LARGE T&R	Purchase Samples
BQ24401PWRG4	ACTIVE	-20 to 70	1.90 \| 100u	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

	TI Inventory Status			Reported Distributor Inventory
BQ24401D	As of 10:15 AM GMT, 19 Nov 2008			As of 10:15 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 26 Nov	4 Weeks	Americas	DigiKey	76
					Mouser Electronics	225
					Newark	123
					Rochester Electronics	>1k
				Asia	WPI	71
				Europe	Avnet-SILICA	150
BQ24401DG4	As of 10:15 AM GMT, 19 Nov 2008			As of 10:15 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
BQ24401DR	As of 10:15 AM GMT, 19 Nov 2008			As of 10:15 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 31 Dec	6 Weeks	None Reported View Distributors
BQ24401DRG4	As of 10:15 AM GMT, 19 Nov 2008			As of 10:15 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 31 Dec	6 Weeks	None Reported View Distributors
BQ24401PW	As of 10:15 AM GMT, 19 Nov 2008			As of 10:15 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	8650*		1 Weeks	Americas	Avnet	450
				Americas	Rochester Electronics	>1k
				Europe	Avnet-SILICA	210
BQ24401PWG4	As of 10:15 AM GMT, 19 Nov 2008			As of 10:15 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	8650*		1 Weeks	None Reported View Distributors
BQ24401PWR	As of 10:15 AM GMT, 19 Nov 2008			As of 10:15 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*		20 Weeks	None Reported View Distributors
BQ24401PWRG4	As of 10:15 AM GMT, 19 Nov 2008			As of 10:15 AM GMT, 19 Nov 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*		20 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
BQ24401D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
BQ24401DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
BQ24401DR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
BQ24401DRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
BQ24401PW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ24401PWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ24401PWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
BQ24401PWRG4	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

Programmable NiCd/NiMH Fast-Charge Management Device (bq24401.pdf, 374 KB)
27 Aug 2001 Download

Application Notes

U-504 Using the bq2000/T to Control Fast Charge (Rev. B) (slua064b.htm, 8 KB)
02 Dec 2004 Abstract

View Application Notes for Battery Charge Management

User Guides

View User Guides for Battery Charge Management

Alternative Products - Are similar to BQ24401
Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Comments
BQ24400	Switch-mode NiCd/NiMH Battery Charger with Peak Voltage Detection Termination	TI customers also evaluated this product.
BQ2004	Switch-mode NiCd/NiMH Battery Charger w/Negative dV, Peak Voltage Detection, dT/dt Termination	TI customers also evaluated this product.
BQ24012	bqTINY(TM) Linear 1-cell Li-Ion Charger w/ 1-A FET, AC Present & Charge Enable in QFN-10	TI customers also evaluated this product.

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BQ24401 Status: ACTIVE

Switch-mode NiCd/NiMH Battery Charger with dT/dt Termination

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