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BQ24741 Status: ACTIVE

Multi-Cell Synchronous Switch-mode Charger With Low Iq and Accurate Trickle Charge


      
         
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 BQ24740 BQ24741BQ24742 
# Series Cells2-4  2-4  2-4  
Charge Current(Max)(A) 10  10  
Charge Status Outputs1  1  1  
Control TopologySwitchmode  Switchmode  Switchmode  
Switching Frequency(kHz)300  300-800  300-800  
Primary Charge Termination MethodHost Controlled  Host Controlled  Host Controlled  
Pin/Package28QFN  28QFN  28QFN  
Vin(Max)(V) 24  24  
Battery Charge Voltage(V) 18  18  
Optional Functions Trickle Charge   
 SamplesSamplesSamples
 InventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • BQ24745: SMBus-Controlled Level 2 Multi-Chemistry Battery Charger With Input Current Detect Comparator
  • BQ24702: Multi-Chemistry Battery Charge Controller and System Power Selector
  • BQ2954: Switch-mode Li-Ion Charge Controller
  • BQ78PL114: PowerLAN Gateway Battery Management Controller with PowerPump Cell Balancing
  • BQ77PL900: 5-10 cell Li-ion Battery protection & AFE

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Product Information

Features

  • NMOS-NMOS Synchronous Buck Converter
  • Resistor-Programmable Switching Frequency between 300 kHz and 800 kHz
  • 9 V-24 V Input Voltage Operation Range
  • Support Two to Four Cells
  • Analog Inputs with Ratiometric Programming via Resistors or DAC/GPIO
    • Charge Voltage (4-4.512 V/cell)
    • Charge Current (up to 10 A)
    • Adapter Current Limit for DPM
  • High-Accuracy Voltage and Current Regulation
    • ±0.5% Charge Voltage Accuracy
    • ±3% Charge Current Accuracy
    • ±3% Adapter Current Accuracy
    • ±2% Input Current Sense Amp Accuracy
  • 150 mA Trickle-charge Current with ±33% Accuracy Down to Zero Battery Voltage
  • Safety Protection
    • Input Overvoltage Protection
    • Battery Overvoltage Protection
    • Charger Overcurrent Protection
    • Thermal Shutdown Protection
    • FET/Inductor/Battery Short Protection

View All Features in Datasheet

Description

The bq24741/2 is a high-efficiency, synchronous battery charger with integrated compensation, offering low component count for space-constrained Li-ion or Li-polymer battery charging applications. Ratiometric charge current and voltage programming allows high regulation accuracies, and can be either hardwired with resistors or programmed by the system power-management microcontroller using a DAC or GPIOs.

The bq24741/2 charges two, three, or four series Li+ cells, supporting up to 10 A of charge current, and is available in a 28-pin, 5x5-mm2 thin QFN package.

The bq24741/2 features resistor-programmable PWM switching frequency and accurate 150mA trickle charge (with 20 m sensing resistor), which can be enabled via the TRICKLE pin.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSamples
BQ24741RHDRACTIVE-40 to 1552.30 | 1kuQFN (RHD) | 28 View 3000 | LARGE T&RPurchase Samples
BQ24741RHDTACTIVE-40 to 1552.55 | 1kuQFN (RHD) | 28 View 250 | SMALL 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

Reported Distributor Inventory as of 12:14 PM GMT, 20 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksBQ24741RHDR
None Reported
View Distributors
TI Lead Time*: 16 WeeksBQ24741RHDT
WorldwideDigiKey 782
View all Distributors  

** 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
BQ24741RHDR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARView 
BQ24741RHDT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARView 

* 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 BQ24741 Help

Datasheet

Application Notes

View Application Notes for Battery Charge Management

User Guides

View User Guides for Battery Charge Management

Tools & Software

NamePart # Company Tool / Software Type
BQ24741EVM for Multicell Synchronous Notebook ChargerBQ24741EVMTexas InstrumentsDevelopment Boards/EVMs
Quick Search Selection Tool for Battery ChargersBATTERY_CHARGERS_SELECTION_TOOLTexas InstrumentsFree Evaluation Tools

Part # Name Product Family Comments
BQ20Z95   SBS 1.1-Compliant Gas Gauge Enabled w/Impedance Track   BATTERY MANAGEMENT - BATTERY FUEL GAUGES      
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BQ2954 Switch-mode Li-Ion Charge Controller BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
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