BQ27350 Status: ACTIVE

Single Cell Li-Ion Battery Manager with Impedance Track Fuel Gauge Technology

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Datasheet

Single Cell Li-Ion Battery Manager with Impedance Track Fuel Gauge Technology (Rev. A) (bq27350.pdf, 627 KB)
01 Apr 2008 Download

	BQ27350
Charge vs Discharge Relationship	C=D
Communication Interface	HDQ, I2C
Pin/Package	20TSSOP
Approx. Price (US$)	1.80 \| 1ku
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

BQ27000: Single-Cell Li-Ion and Li-Pol Battery Gas Gauge IC
BQ26231: Cost-Efficient Coulomb Counter for Battery Capacity Monitoring In Embedded Portable Applications
BQ26500: Complete Battery Fuel Gauge for One and Two Cell Li-Ion Applications
TPS75925: Single Output LDO, 7.5A, Fixed(2.5V), Fast Transient Response, Low Quiescent Current
TPS70448: Dual-output (3.3V/1.2V)1A/2A LDO Regulator with dual enables and SVS for split-voltage systems
MC34063A: 1.5-A Boost/Buck/Inverting Switching Regulator

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Product Information

Features

Comprehensive Battery Fuel Gauge for Single Cell and 1-Series Li-Ion Applications
Secure Battery Authentication Using SHA-1/HMAC Encryption
Calculates and Reports
- Remaining Battery Capacity
- Battery Voltage and Temperature
- Charge and Discharge Current
- Four Time-to-Empty Predictions
Battery Fuel Gauge Based on Patented Impedance Track™ Technology
- Models the Battery Discharge Curve for Accurate Time-to-Empty Predictions
- Automatically Adjusts for Battery Aging, Battery Self Discharge, and Temperature/Rate Inefficiencies
- Low Value Sense Resistor (10m or Less)
96-Bytes Non-Volatile Scratch Pad Data Memory
I²C Communications Interface to the Host
20-Pin TSSOP Package
APPLICATIONS
- POS Terminals
- Industrial Data Collection
- Smartphones
- PDAs
- Digital Cameras
- Handheld Terminals

Impedance Track is a trademark of Texas Instruments.

Description

The Texas Instruments’ bq27350 is a battery fuel gauge with secure authentication support for single cell Li-Ion battery packs. Designed for battery pack integration, the device requires little host microcontroller firmware support for implementation. The system host processor communicates with the bq27350 over an I²C interface to obtain remaining battery capacity, system run-time predictions, and other critical battery information.

The bq27350 uses the patented Impedance Track™ algorithm for its fuel gauging. The gauge provides information such as state-of-charge (%), run-time to empty (min.), charge time to full (min.), battery voltage (V), and pack temperature (°C).

The bq27350 also features both integrated and external support for secure battery pack authentication, using the SHA-1/HMAC authentication algorithm.

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
BQ27350PW	ACTIVE	-40 to 85	1.80 \| 1ku	TSSOP (PW) \| 20	View	70 \| TUBE	Purchase Samples
BQ27350PWG4	ACTIVE	-40 to 85	1.80 \| 1ku	TSSOP (PW) \| 20	View	70 \| TUBE	Purchase Samples
BQ27350PWR	ACTIVE	-40 to 85	1.80 \| 1ku	TSSOP (PW) \| 20	View	2000 \| LARGE T&R
BQ27350PWRG4	ACTIVE	-40 to 85	1.80 \| 1ku	TSSOP (PW) \| 20	View	2000 \| LARGE T&R

* 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
BQ27350PW	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*	490 \| 26 Nov	4 Weeks	Americas	Mouser Electronics	96
	0*	>10k \| 26 Dec	4 Weeks
BQ27350PWG4	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*	490 \| 26 Nov	4 Weeks	Americas	Mouser Electronics	110
	0*	>10k \| 26 Dec	4 Weeks
BQ27350PWR	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*	3041 \| 26 Nov	10 Weeks	Americas	DigiKey	>1k
		>10k \| 26 Jan		Americas	Mouser Electronics	>1k
				Asia	WPI	>1k
BQ27350PWRG4	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*	3041 \| 26 Nov	10 Weeks	None Reported View Distributors
	0*	>10k \| 26 Jan	10 Weeks
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
BQ27350PW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
BQ27350PWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
BQ27350PWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
BQ27350PWRG4	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

Datasheets

Single Cell Li-Ion Battery Manager with Impedance Track Fuel Gauge Technology (Rev. A) (bq27350.pdf, 627 KB)
01 Apr 2008 Download

Application Notes

Single-Cell Impedance Track Gas Gauge for Novices (slua422.htm, 8 KB)
16 Jun 2007 Abstract
Configuring the bq27350 Data Flash (slua419.htm, 8 KB)
19 Apr 2007 Abstract
Data Flash Programming and Calibrating the bq27350 Gas Gauge (slua415.htm, 8 KB)
13 Mar 2007 Abstract

View Application Notes for Battery Fuel Gauges

User Guides

bq27350EVM Single Cell Impedance Track Technology (sluu253.htm, 8 KB)
22 Mar 2007 Abstract

Tools & Software

Name	Part #	Company	Tool / Software Type
BQ27350EVM Single Cell Impedance TrackT Technology	BQ27350EVM	Texas Instruments	Development Boards/EVMs
bqEVSWSetup00.09.37_bq27350v1.00(sluc115.zip, 4711 KB ) 14 Aug 2008 zip
Multiple Li-Ion Chemistries Software(sluc070.zip, 1378 KB ) 18 May 2007 zip

Alternative Products - Are similar to BQ27350
Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Comments
BQ27000	Single-Cell Li-Ion and Li-Pol Battery Gas Gauge IC	TI customers also evaluated this product.
BQ26231	Cost-Efficient Coulomb Counter for Battery Capacity Monitoring In Embedded Portable Applications	TI customers also evaluated this product.
BQ26500	Complete Battery Fuel Gauge for One and Two Cell Li-Ion Applications	TI customers also evaluated this product.
BQ27500-V100	System-Side Impedance Track(TM) Fuel Gauge	TI customers also evaluated this product.
BQ27540	Single Cell Li-Ion Battery Manager with Impedance Track Fuel Gauge Technology	TI customers also evaluated this product.
BQ20Z75-V160	SBS 1.1-Compliant Gas Gauge and Protection-Enabled IC with Impedance Track(TM)	TI customers also evaluated this product.
BQ20Z95	SBS 1.1-COMPLIANT GAS GAUGE and PROTECTION ENABLED WITH IMPEDANCE TRACK(TM)	TI customers also evaluated this product.

Complementary Products - Can be used with BQ27350
Customers Who Evaluated This Product Also Evaluated...
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