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BQ24750 Status: NRND

Multi-Cell Synchronous Switch-mode Charger with System Power Selector

      
         
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Product is Not Recommended for New Design (NRND)

Replaced By:

  • BQ24750A The device is an EXACT EQUIVALENT in functionality and parametrics to the compared device. 
 BQ24740 BQ24750A BQ24751B BQ24753 
# Series Cells2-4  2-4  2-4  2-4  
Charge Status Outputs1  1  1  1  
Control TopologySwitchmode  Switchmode  Switchmode  Switchmode  
Switching Frequency(kHz)300  300  300  300  
Primary Charge Termination MethodHost Controlled  Host Controlled  Host Controlled  Host Controlled  
Pin/Package28QFN  28QFN  28QFN  28QFN  
 SamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventory

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
    • Automatic System Power Selection From AC/DC Adapter or Battery
    • Internal Loop Compensation
    • Internal Soft Start
  • Safety
    • Input Overvoltage Protection (OVP)
    • Dynamic Power Management (DPM) with Status Indicator
    • Programmable Inrush Adapter Power (ACOP) and Overcurrent (ACOC) Limits
    • Reverse-Conduction Protection Input FET
    • Battery Thermistor Sense Input (TS) for Charge Qualification
  • 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
    • AC/DC Adapter Present with Programmable Voltage Threshold
    • DPM Loop Active
    • Current Drawn from Input Source
  • Supports Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.
  • Charge Enable
  • 10-µA Off-State Current
  • 28-pin, 5x5-mm QFN package
  • APPLICATIONS
    • Notebook and Ultra-Mobile Computers
    • Portable Data-Capture Terminals
    • Portable Printers
    • Medical Diagnostics Equipment
    • Battery Bay Chargers
    • Battery Back-up Systems

Description

The bq24750 is a high-efficiency, synchronous battery charger with integrated compensation and system power selector logic, 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 bq24750 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 QFN package.

The bq24750 controls external switches to prevent battery discharge back to the input, connect the adapter to the system, and to connect the battery to the system using 6-V gate drives for better system efficiency. For maximum system safety, inrush-power limiting provides instantaneous response to high input voltage multiplied by current. This AC Over-Power protection (ACOP) feature limits the input-switch power to the programmed level on the ACOP pin, and latches off if the high-power condition persists to prevent overheating.

The bq24750 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. A highly-accurate current-sense amplifier enables precise measurement of input current from the AC adapter to monitor the overall system power.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsSamples
BQ24750RHDRNRND-40 to 1252.50 | 1kuQFN (RHD) | 28 View 3000 | LARGE T&R Download CAD Format for this SymbolNot Available
BQ24750RHDRG4NRND-40 to 1252.50 | 1kuQFN (RHD) | 28 View 3000 | LARGE T&R Download CAD Format for this SymbolNot Available
BQ24750RHDTNRND-40 to 1252.75 | 1kuQFN (RHD) | 28 View 250 | SMALL T&R Download CAD Format for this SymbolNot Available
BQ24750RHDTG4NRND-40 to 1252.75 | 1kuQFN (RHD) | 28 View 250 | SMALL T&R Download CAD Format for this SymbolNot 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

  TI Inventory Status Reported Distributor Inventory
BQ24750RHDRAs of 12:02 PM GMT, 03 Jul 2009As of 12:02 PM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasMouser Electronics >1k
BQ24750RHDRG4As of 12:02 PM GMT, 03 Jul 2009As of 12:02 PM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 WeeksNone Reported
View Distributors		   
BQ24750RHDTAs of 12:02 PM GMT, 03 Jul 2009As of 12:02 PM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasAvnet 250
 Mouser Electronics 47
 Newark 248
BQ24750RHDTG4As of 12:02 PM GMT, 03 Jul 2009As of 12:02 PM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 WeeksNone 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
BQ24750RHDR  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ24750RHDRG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ24750RHDT  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ24750RHDTG4  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 BQ24750 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
BQ24750 EVM For Multi Cell Synchronous Notebook Charger and System Power SelectorBQ24750EVMTexas InstrumentsDevelopment Boards/EVMs
BQ24751 EVM For Multi Cell Synchronous Notebook Charger and System Power SelectorBQ24751EVMTexas InstrumentsDevelopment Boards/EVMs
Quick Search Selection Tool for Battery ChargersBATTERY_CHARGERS_SELECTION_TOOLTexas InstrumentsFree Evaluation Tools

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