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BQ24740 Status: ACTIVE

Multi-Cell Synchronous Switch-mode Battery Charger


      
         
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 BQ24740BQ24741 BQ24750A BQ24751B BQ24753 BQ24753A 
# Series Cells2-4  2-4  2-4  2-4  2-4  2-4  
Charge Current(Max)(A) 10      
Charge Status Outputs1  1  1  1  1  1  
Control TopologySwitchmode  Switchmode  Switchmode  Switchmode  Switchmode  Switchmode  
Switching Frequency(kHz)300  300-800  300  300  300  300  
Primary Charge Termination MethodHost Controlled  Host Controlled  Host Controlled  Host Controlled  Host Controlled  Host Controlled  
Pin/Package28QFN  28QFN  28QFN  28QFN  28QFN  28QFN  
Vin(Max)(V) 24      
Battery Charge Voltage(V) 18      
Optional Functions Trickle Charge      
 SamplesSamplesSamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • BQ24753A: Host-Controlled Li-Ion and Li-Polymer Battery Charger with Low Iq and System Power Selector
  • BQ24702: Multi-Chemistry Battery Charge Controller and System Power Selector
  • BQ24721C: Smart Battery Charger with SMBus and System Power Selector, Softer Turn-On
  • TPS51610: Single Phase D-CAP+™Mode Step Down Controller for IMVP6+ CPU/GPU Vcore
  • TPS51116: DDR1, DDR2, DDR3 Switcher and LDO
  • TPS54620: 4.5V to 17V Input, 6A Synchronous Step Down SWIFT™ Converter

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Product Information

Features

  • NMOS-NMOS Synchronous Buck Converter with 300 kHz Frequency and >95% Efficiency
  • 30-ns Minimum Driver Dead-time and 99.5% Maximum Effective Duty Cycle
  • 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
  • Integration
    • Internal Loop Compensation
    • Internal Soft Start
  • Safety
    • Input Overvoltage Protection (OVP)
    • Dynamic Power Management (DPM) with Status Indicator
  • Supports Two, Three, or Four Li+ Cells
  • 5 - 24 V AC/DC-Adapter Operating Range
  • Analog Inputs with Ratiometric Programming via Resistors or DAC/GPIO Host Control
    • Charge Voltage (4-4.512 V/Cell)
    • Charge Current (up to 10 A, with 10-m Sense Resistor)
    • Adapter Current Limit (DPM)
  • Status and Monitoring Outputs

View All Features in Datasheet

Description

The bq24740 is a high-efficiency, synchronous battery charger with integrated compensation, offering low component count for space-constrained multi-chemistry 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 bq24740 charges two, three, or four series Li+ cells, supporting up to 10 A of charge current, and is available in a 28-pin, 5x5-mm thin QFN package.

The bq24740 features Dynamic Power Management (DPM) and input power limiting. These features reduce battery charge current when the input power limit is reached to avoid overloading the ac adapter when supplying the load and the battery charger simultaneously.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsSamples
BQ24740RHDRACTIVE-40 to 852.30 | 1kuQFN (RHD) | 28 View 3000 | LARGE T&R Download CAD Format for this Symbol
BQ24740RHDRG4ACTIVE-40 to 852.30 | 1kuQFN (RHD) | 28 View 3000 | LARGE T&R Download CAD Format for this Symbol
BQ24740RHDTACTIVE-40 to 852.55 | 1kuQFN (RHD) | 28 View 250 | SMALL T&R Download CAD Format for this SymbolPurchase Samples
BQ24740RHDTG4ACTIVE-40 to 852.55 | 1kuQFN (RHD) | 28 View 250 | SMALL T&R Download CAD Format for this SymbolPurchase 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

Reported Distributor Inventory as of 12:14 PM GMT, 20 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksBQ24740RHDR
AsiaWPI 1k
WorldwideDigiKey >1k
Mouser Electronics >1k
TI Lead Time*: 20 WeeksBQ24740RHDRG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksBQ24740RHDT
AmericasNewark 681
AsiaFarnell Asia 681
WPI 250
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksBQ24740RHDTG4
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
BQ24740RHDR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARView 
BQ24740RHDRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARView 
BQ24740RHDT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARView 
BQ24740RHDTG4 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 BQ24740 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
BQ24740EVM for Multicell Synchronous Notebook ChargerBQ24740EVMTexas 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
BQ24753A Host-Controlled Li-Ion and Li-Polymer Battery Charger with Low Iq and System Power Selector BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24702 Multi-Chemistry Battery Charge Controller and System Power Selector 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.
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.
BQ24753 Host-Controlled Multi-Chemistry Battery Charger with Low Iq and System Power Selector 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.
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.
BQ2954 Switch-mode Li-Ion Charge Controller 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.
BQ24703 Multi-Chemistry Battery Charge Controller and System Power Selector BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
TPS51610 Single Phase D-CAP+™Mode Step Down Controller for IMVP6+ CPU/GPU Vcore NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS51116 DDR1, DDR2, DDR3 Switcher and LDO NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS54620 4.5V to 17V Input, 6A Synchronous Step Down SWIFT™ Converter DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.
TPS51117 1.8V to 28V Input Sync. Step Down Controller with DCAP™ Mode, Optimized for Light Load Efficiency NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS23753 IEEE 802.3-2005 PoE Interface and Isolated Converter and Controller POWER OVER ETHERNET/LAN SOLUTIONS-POWERED DEVICES TI customers also evaluated this product.

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