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BQ27350 Status: NRND

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


      
         
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Alert Icon   NRND: This product is not recommended for new designs. However, the device, tool, or software continues to be in production to support existing customers. TI does not recommend using this part in a new design. TI encourages designers to consider alternative products for new designs.

Replaced By:

  • BQ27541 The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 

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

View All Features in Datasheet

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

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
BQ27350PWNRND-40 to 852.00 | 1kuTSSOP (PW) | 20 View 70 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
BQ27350PWG4NRND-40 to 852.00 | 1kuTSSOP (PW) | 20 View 70 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
BQ27350PWRNRND-40 to 851.80 | 1kuTSSOP (PW) | 20 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
BQ27350PWRG4NRND-40 to 851.80 | 1kuTSSOP (PW) | 20 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available

* 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

Reported Distributor Inventory as of 12:12 PM GMT, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksBQ27350PW
WorldwideMouser Electronics 28
TI Lead Time*: 20 WeeksBQ27350PWG4
WorldwideMouser Electronics 110
TI Lead Time*: 20 WeeksBQ27350PWR
AsiaWPI >1k
WorldwideMouser Electronics 651
TI Lead Time*: 20 WeeksBQ27350PWRG4
None Reported
View Distributors
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** 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 ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
BQ27350PW  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ27350PWG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ27350PWR  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ27350PWRG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView

* 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

Most useful technical documents for BQ27350 Help

Datasheet

Application Notes

View Application Notes for Battery Fuel Gauges

User Guides

Tools & Software

NamePart # Company Tool / Software Type
BQ27350EVM Single Cell Impedance TrackT TechnologyBQ27350EVMTexas InstrumentsDevelopment Boards/EVMs

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