BQ24751 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:

  • BQ24751B The device is an EXACT EQUIVALENT in functionality and parametrics to the compared device. 

Datasheet

Download - PDF Icon
  • Host-controlled Multi-chemistry Battery Charger w/Sys Power Selector (Rev. C) (bq24751.pdf, 1702 KB)
    07 Nov 2008 Download

 BQ24740 BQ24750 BQ24750A BQ24751B 
# 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
 InventoryInventoryInventory Not AvailableInventory

Customers Who Evaluated This Product Also Evaluated

  • BQ24751A: Multi-Cell Synchronous Switch-mode Charger with System Power Selector with Low Iq
  • BQ24721C: Smart Battery Charger with SMBus and System Power Selector, Softer Turn-On
  • BQ24750: Multi-Cell Synchronous Switch-mode Charger with System Power Selector

More Related Products

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
    • Programmable 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
  • 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
    • Current Drawn from Input Source
  • Battery Learn Cycle Control
  • Supports Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.
  • Charge Enable
  • 10-µA Off-State Current
  • 28-pin, 5×5-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 bq24751 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 bq24751 charges two, three, or four series Li+ cells, supporting up to 10 A of charge current, and is available in a 28-pin, 5×5-mm thin QFN package.

The bq24751 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 bq24751 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
BQ24751RHDRNRND-40 to 1253.15 | 100uQFN (RHD) | 28 View 3000 | LARGE T&R Download CAD Format for this SymbolNot Available
BQ24751RHDRG4NRND-40 to 1253.15 | 100uQFN (RHD) | 28 View 3000 | LARGE T&R Download CAD Format for this SymbolNot Available
BQ24751RHDTNRND-40 to 1253.45 | 100uQFN (RHD) | 28 View 250 | SMALL T&R Download CAD Format for this SymbolNot Available
BQ24751RHDTG4NRND-40 to 1253.45 | 100uQFN (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
BQ24751RHDRAs of 10:15 AM GMT, 19 Nov 2008As of 10:15 AM GMT, 19 Nov 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* 1743 | 26 Nov 12 Weeks AmericasDigiKey 829
 >10k | 7 Jan Mouser Electronics >1k
  AsiaWPI >1k
BQ24751RHDRG4As of 10:15 AM GMT, 19 Nov 2008As of 10:15 AM GMT, 19 Nov 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* 1743 | 26 Nov 12 Weeks None Reported
View Distributors
   
 >10k | 7 Jan     
BQ24751RHDTAs of 10:15 AM GMT, 19 Nov 2008As of 10:15 AM GMT, 19 Nov 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* 3500 | 26 Nov 4 Weeks AmericasNewark 192
 >10k | 26 Jan     
BQ24751RHDTG4As of 10:15 AM GMT, 19 Nov 2008As of 10:15 AM GMT, 19 Nov 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* 3500 | 26 Nov 4 Weeks None Reported
View Distributors
   
 >10k | 26 Jan     
View all Distributors  

* Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.

** 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
BQ24751RHDR  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ24751RHDRG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ24751RHDT  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ24751RHDTG4  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

Datasheets

  • Host-controlled Multi-chemistry Battery Charger w/Sys Power Selector (Rev. C) (bq24751.pdf, 1702 KB)
    07 Nov 2008 Download

Application Notes

  • BQ24751x Device Comparison (slua484.htm, 8 KB)
    30 Sep 2008 Abstract
  • Input Filter Design for Portable Power Management System (slua413.htm, 8 KB)
    31 Jan 2007 Abstract
  • Design of a Narrow VDC (NVDC) System Charger VR Using BQ24721/BQ24730 (slua412.htm, 8 KB)
    04 Jan 2007 Abstract

View Application Notes for Battery Charge Management

User Guides

  • bq24750/50A/51/51A/51B/52/53 EVM (HPA207) For Multi Cell Synchronous (Rev. C) (sluu283c.pdf, 1948 KB)
    10 Sep 2008 Download

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

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BQ24751AMulti-Cell Synchronous Switch-mode Charger with System Power Selector with Low IqTI customers also evaluated this product.
BQ24721CSmart Battery Charger with SMBus and System Power Selector, Softer Turn-OnTI customers also evaluated this product.
BQ24750Multi-Cell Synchronous Switch-mode Charger with System Power SelectorTI customers also evaluated this product.
BQ24702Multi-Chemistry Battery Charge Controller and System Power SelectorTI customers also evaluated this product.
BQ24745SMBus-Controlled Level 2 Multi-Chemistry Battery Charger With Input Current Detect ComparatorTI customers also evaluated this product.
BQ24705Host-Controlled Multi-Chemistry Battery Charger With Low Input Power DetectTI customers also evaluated this product.
BQ24740Multi-Cell Synchronous Switch-mode Battery ChargerTI customers also evaluated this product.

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