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BQ24703 Status: ACTIVE

Multi-Chemistry Battery Charge Controller and System Power Selector


      
         
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 BQ24703
# Series CellsMultiple  
Charge Current(Max)(A)>2  
Charge Status Outputs1  
Control TopologySwitchmode  
Switching Frequency(kHz)350  
Primary Charge Termination MethodHost Controlled  
Pin/Package24TSSOP, 28QFN  
Vin(Max)(V)30  
Battery Charge Voltage(V)adjustable  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • BQ24702: Multi-Chemistry Battery Charge Controller and System Power Selector
  • BQ2954: Switch-mode Li-Ion Charge Controller
  • BQ2000: Switch-mode Multi-Chemistry Battery Charger with Peak Voltage Detection Termination

More Related Products

Product Information

Features

  • Dynamic Power Management, DPM Minimizes Battery Charge Time
  • Integrated Selector Supports Battery Conditioning and Smart Battery Learn Cycle
  • Zero Volt Operation
  • Selector Feedback Circuit Ensures Break-Before-Make Transition
  • ±0.4% Charge Voltage Accuracy, Suitable for Charging Li-Ion Cells
  • ±4% Charge Current Accuracy
  • 300-kHz Integrated PWM Controller for High-Efficiency Buck Regulation
  • Depleted Battery Detection and Indication to Protect Battery From Over Discharge
  • 20-µA Sleep Mode Current for Low Battery Drain
  • 24-Pin TSSOP Package and 5 mm × 5 mm QFN package (bq24703 only)

Description

The bq24702/bq24703 is a highly integrated battery charge controller and selector tailored for notebook and sub-notebook PC applications.

The bq24702/bq24703 uses dynamic power management (DPM) to minimize battery charge time by maximizing use of available wall-adapter power. This is achieved by dynamically adjusting the battery charge current based on the total system (adapter) current.

The bq24702/bq24703 uses a fixed frequency, pulse width modulator (PWM) to accurately control battery charge current and voltage. Charge current limits can be programmed from a keyboard controller DAC or by external resistor dividers from the precision 5-V, ±0.6%, externally bypassed voltage reference (VREF), supplied by the bq24702/bq24703.

The battery voltage limit can be programmed by using the internal 1.196-V, ±0.5% precision reference, making it suitable for the critical charging demands of lithium-ion cells. Also, the bq24702/bq24703 provides an option to override the precision reference and drive the error amplifier either directly from an external reference or from a resistor divider off the 5 V supplied by the integrated circuit.

The selector function allows the manual selection of the system power source, battery or wall-adapter power. The bq24702/bq24703 supports battery-conditioning and battery-learn cycles through the ACSEL function. The ACSEL function allows manual selection of the battery or wall power as the main system power. It also provides autonomous switching to the remaining source (battery or ac power) should the selected system power source terminate (refer to Available Options table for the differences between the bq24702 and the bq24703). The bq24702/bq24703 also provides an alarm function to indicate a depleted battery condition.

The bq24702/bq24703 PWM controller is ideally suited for operation in a buck converter for applications when the wall-adapter voltage is greater than the battery voltage.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
BQ24703PWACTIVE-40 to 1252.35 | 1kuTSSOP (PW) | 24 View 60 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ24703PWG4ACTIVE-40 to 1252.35 | 1kuTSSOP (PW) | 24 View 60 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ24703PWRACTIVE-40 to 1252.10 | 1kuTSSOP (PW) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ24703PWRG4ACTIVE-40 to 1252.10 | 1kuTSSOP (PW) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ24703RHDRACTIVE-40 to 852.10 | 1kuQFN (RHD) | 28 View 3000 | LARGE T&R Download CAD Format for this Symbol 
BQ24703RHDRG4ACTIVE-40 to 852.10 | 1kuQFN (RHD) | 28 View 3000 | LARGE T&R Download CAD Format for this Symbol 

* 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 12:06 PM GMT, 08 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 4 WeeksBQ24703PW
AmericasAvnet 568
Newark 56
Rochester Electronics >1k
AsiaFarnell Asia 182
WPI 21
EuropeAvnet-SILICA 15
Farnell 162
WorldwideDigiKey 152
Mouser Electronics 77
TI Lead Time*: 4 WeeksBQ24703PWG4
AsiaFarnell Asia 55
EuropeFarnell 51
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksBQ24703PWR
AmericasRochester Electronics >1k
AsiaWPI >1k
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksBQ24703PWRG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksBQ24703RHDR
AsiaWPI >1k
WorldwideDigiKey 844
TI Lead Time*: 20 WeeksBQ24703RHDRG4
WorldwideDigiKey  Available
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
BQ24703PW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ24703PWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ24703PWR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ24703PWRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ24703RHDR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ24703RHDRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView

* 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 BQ24703 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
BQ24703 Evaluation ModuleBQ24703EVMTexas InstrumentsDevelopment Boards/EVMs
Quick Search Selection Tool for Battery ChargersBATTERY_CHARGERS_SELECTION_TOOLTexas InstrumentsFree Evaluation Tools

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
BQ24702 Multi-Chemistry Battery Charge Controller and System Power Selector BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ2954 Switch-mode Li-Ion Charge Controller BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ2000 Switch-mode Multi-Chemistry Battery Charger with Peak Voltage Detection Termination BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24741 Multi-Cell Synchronous Switch-mode Charger With Low Iq and Accurate Trickle Charge BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24750A Host-controlled Multi-chemistry Battery Charger w/Integrated Sys Power Selector BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ2031 Switch-mode Lead-Acid Battery Charger with User-Selectable Charge Algorithms BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24745 SMBus-Controlled Level 2 Multi-Chemistry Battery Charger With Input Current Detect Comparator BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24105 Standalone Synchronous Switch-Mode Li-Ion Charger w/2A FET in QFN-20, 1 to 3 Cells BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24721C Smart Battery Charger with SMBus and System Power Selector, Softer Turn-On BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24740 Multi-Cell Synchronous Switch-mode Battery Charger BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.

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