TI Home > Semiconductors > Power Management > Battery Management > Battery Charge Management >

BQ24704 Status: ACTIVE

Low Cost, Host-Controlled Li-Ion and Li-Polymer Battery Charger With Low Iq


      
         
Alert me about changes<br/>to this product


Datasheet

Download - PDF Icon		 

Functional Block Diagram


enlarge Enlarge

 BQ24704
# Series Cells2-4  
Charge Current(Max)(A)up to 8  
Charge Status Outputs1  
Control TopologySwitchmode  
Switching Frequency(kHz)300  
Primary Charge Termination MethodHost Controlled  
Pin/Package24VQFN  
Vin(Max)(V)30  
Battery Charge Voltage(V)4 to 4.512  
Optional FunctionsEnergy Star Low Iq  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • BQ24753A: Host-Controlled Li-Ion and Li-Polymer Battery Charger with Low Iq and System Power Selector
  • BQ24072: USB-Friendly Li-Ion Battery Charger and Power-Path Management IC, Vout 200mV above Vbat
  • BQ24745: SMBus-Controlled Level 2 Multi-Chemistry Battery Charger With Input Current Detect Comparator
  • TPS76318: Single Output LDO, 150mA, Fixed(1.8V), Low Quiescent Current, Thermal Protection
  • TL7702B: Single SVS With Pgmmable UV Threshold & Reset Time Delay
  • TPS3809L30: 3-Pin Supply Voltage Supervisor

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
    • Internal Loop Compensation
    • Internal Soft-Start
  • Safety
    • Dynamic Power Management (DPM) with Status Indicator
    • Charger Overcurrent Protection
    • Battery Overvoltage Protection
    • Thermal Shutdown
  • Supports Two, Three, or Four Li+ Cells
  • 8 — 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 8 A, with 10-m Sense Resistor)

View All Features in Datasheet

Description

The bq24704 is a high-efficiency, synchronous battery charger with integrated compensation offering low component count for space-limited Li-Ion and Li-Polymer battery charging applications. 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 bq24704 charges two, three, or four series Li+ cells, supporting up to 8 A of charge current, and is available in a 24-pin, 4x4-mm thin QFN package.

The bq24704 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

PricePackagingSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSamples
BQ24704RGERACTIVE-40 to 1252.20 | 1kuVQFN (RGE) | 24 View 3000 | LARGE T&RPurchase Samples
BQ24704RGETACTIVE-40 to 1252.45 | 1kuVQFN (RGE) | 24 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 12:13 PM GMT, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 16 WeeksBQ24704RGER
None Reported
View Distributors
TI Lead Time*: 16 WeeksBQ24704RGET
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
BQ24704RGER RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ24704RGET 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 BQ24704 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
BQ24704 Evaluation Module For Multicell Synchronous Notebook ChargerBQ24704EVMTexas 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.
BQ24072 USB-Friendly Li-Ion Battery Charger and Power-Path Management IC, Vout 200mV above Vbat 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.
BQ24747 SMBus-Controlled Level 2 Multi-Chemistry Battery Charger 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.
BQ24450 Integrated Charge Controller for Lead-Acid Batteries BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24100 Standalone Synchronous Switch-mode Li-Ion Charger w/2A FET in QFN-20, 1-Cell 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.
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.
BQ24055 800mA, Single-Input, Single Cell Li-Ion Battery Charger with Automatic AC/USB Detection and PG BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
TPS76318 Single Output LDO, 150mA, Fixed(1.8V), Low Quiescent Current, Thermal Protection LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
TL7702B Single SVS With Pgmmable UV Threshold & Reset Time Delay POWER MANAGEMENT-SUPERVISORY CIRCUITS(VOLTAGE SUPERVISORS) TI customers also evaluated this product.
TPS3809L30 3-Pin Supply Voltage Supervisor POWER MANAGEMENT-SUPERVISORY CIRCUITS(VOLTAGE SUPERVISORS) TI customers also evaluated this product.
TPS76328 Single Output LDO, 150mA, Fixed(2.8V), Low Quiescent Current, Thermal Protection LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
TPS23754 High Power/High Efficiency PoE Interface and DC/DC Controller POWER OVER ETHERNET/LAN SOLUTIONS-POWERED DEVICES 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.
UC2844 Current-Mode PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC2808-1 Low Power Current Mode Push-Pull PWM AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
TPS79318 Single Output LDO, 200mA, Fixed(1.8V), High PSRR, Low Noise LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
TPS54040 3.5V to 42V Input, 0.5 A Step Down SWIFT™ Converter with Eco-Mode™ DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.

Support and Community

Customer Tags Help

No Tags are Available for this Part Number

Other Support



Click Here