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BQ24745 Status: ACTIVE

SMBus-Controlled Level 2 Multi-Chemistry Battery Charger With Input Current Detect Comparator


      
         
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 BQ24745
# Series Cells1-4  
Charge Status Outputs1  
Control TopologySwitchmode  
Switching Frequency(kHz)300  
Primary Charge Termination MethodHost Controlled  
Pin/Package28QFN  
Vin(Max)(V)24  
Battery Charge Voltage(V)19.2  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • BQ24741: Multi-Cell Synchronous Switch-mode Charger With Low Iq and Accurate Trickle Charge
  • BQ24753A: Host-Controlled Li-Ion and Li-Polymer Battery Charger with Low Iq and System Power Selector
  • BQ24705: Host-Controlled Multi-Chemistry Battery Charger With Low Input Power Detect
  • BQ20Z40: SBS Compliant Gas Gauge with Impedance Track Technology for use with BQ29330
  • TPS51200: Sink/Source DDR Termination Regulator
  • TPS61045: 28-V, 85% Efficient Boost Converter in QFN-8, Digitally Adjustable

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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
    • Input Current Comparator, With Adjustable Threshold and Hysteresis
    • Internal Soft-Start
  • Safety
    • Input Overvoltage Protection (OVP)
    • Dynamic Power Management (DPM)
  • Up to 19.2 V Battery Voltage
  • 6 V —24 V AC/DC-Adapter Operating Range
  • Simplified SMBus Control Interface
    • Charge Voltage DAC (1.024 V —19.2 V)
    • Charge Current DAC (128 mA—8.064 A)
    • Adapter Current Limit DPM DAC (256 mA—11.008 A)
  • Status and Monitoring Outputs

View All Features in Datasheet

Description

The bq24745 is a high-efficiency, synchronous battery charger with an integrated input-current comparator, offering low component count for space-constrained, multi-chemistry battery-charging applications. The input-current, charge-current, and charge-voltage DACs allow very high regulation accuracies that can be easily programmed by the system power-management microcontroller using the SMBus interface. The bq24745 charges one, two, three, or four series Li+ cells, and is available in a 28-pin, 5x5 mm2 QFN package.

The bq24745 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 adaptor 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
BQ24745RHDRACTIVE0 to 1252.90 | 1kuQFN (RHD) | 28 View 3000 | LARGE T&R Download CAD Format for this SymbolPurchase Samples
BQ24745RHDRG4ACTIVE0 to 1252.90 | 1kuQFN (RHD) | 28 View 3000 | LARGE T&R Purchase Samples
BQ24745RHDTACTIVE0 to 1253.20 | 1kuQFN (RHD) | 28 View 250 | SMALL T&R Download CAD Format for this Symbol
BQ24745RHDTG4ACTIVE0 to 1253.20 | 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 WeeksBQ24745RHDR
AsiaWPI >1k
TI Lead Time*: 20 WeeksBQ24745RHDRG4
None Reported
View Distributors
TI Lead Time*: 16 WeeksBQ24745RHDT
None Reported
View Distributors
TI Lead Time*: 16 WeeksBQ24745RHDTG4
None Reported
View Distributors
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
BQ24745RHDR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARView 
BQ24745RHDRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARView 
BQ24745RHDT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARView 
BQ24745RHDTG4 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 BQ24745 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
BQ24745 Evaluation ModuleBQ24745EVMTexas 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
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.
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.
BQ24705 Host-Controlled Multi-Chemistry Battery Charger With Low Input Power Detect 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.
BQ2000 Switch-mode Multi-Chemistry Battery Charger with Peak Voltage Detection Termination 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.
BQ24721C Smart Battery Charger with SMBus and System Power Selector, Softer Turn-On 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.
BQ24450 Integrated Charge Controller for Lead-Acid Batteries 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.
BQ20Z40 SBS Compliant Gas Gauge with Impedance Track Technology for use with BQ29330 BATTERY MANAGEMENT-BATTERY FUEL GAUGES TI customers also evaluated this product.
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TPS73001 Single Output LDO, 200mA, Adj.(1.5 to 5.5V), High PSRR, Low Noise LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
TPS74201 Single Output LDO, 1.5A, Adj.(0.8 to 3.3V), Any or No Cap, Programmable SoftStart LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
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TPS78233 Single Fixed Output LDO, 150mA, 1uA Quiescent Current LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
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