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Battery Charger Li-Ion 10000mA 8V to 18V 24-Pin VQFN EP T/R, BQ24704RGER, Texas Instruments

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, 4×4-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. A highly-accurate current-sense amplifier enables precise measurement of input current from the AC adapter to monitor the overall system power.

  • 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-mO Sense Resistor)
    • Adapter Current Limit (DPM)
  • Status and Monitoring Outputs
    • AC/DC Adapter Present with Programmable Voltage Threshold
    • DPM Loop Active (DPMDET)
    • Current Drawn from Input Source
  • Charge Enable
  • 24-pin, 4×4-mm QFN Package
  • Energy Star Low Iq
    • < 10 µA Off-state Discharge Current
    • < 1.5 mA Off-state Input Quiescent Current
  • APPLICATIONS
    • Notebook and Netbook Computers
    • Portable Data-Capture Terminals
    • Portable Printers
    • Medical Diagnostics Equipment
    • Battery Bay Chargers
    • Battery Back-Up Systems

    • Характеристики

    Battery_type

    Li-Ion
    Operating_temperature

    -40 to 125 °C
    Specifications

    http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=BQ24704&&fileType=pdf
    Schedule_b

    8542390000
    Product_dimensions

    4 x 4 x 0.88 mm
    Pin_count

    24
    Output_voltage

    8 to 18 V
    Output_current

    10 A
    Supplier_package

    VQFN EP
    Msl_level

    2
    Бренд

    Mounting

    Surface Mount
    Max_processing_temp

    260
    Lead_finish

    Gold
    Kind

    Battery Charger
    Htsn

    8542390001
    Eccn

    EAR99
    Country_of_origin

    United States
    Артикул: BQ24704RGER

    Описание

    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, 4×4-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. A highly-accurate current-sense amplifier enables precise measurement of input current from the AC adapter to monitor the overall system power.

  • 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-mO Sense Resistor)
    • Adapter Current Limit (DPM)
  • Status and Monitoring Outputs
    • AC/DC Adapter Present with Programmable Voltage Threshold
    • DPM Loop Active (DPMDET)
    • Current Drawn from Input Source
  • Charge Enable
  • 24-pin, 4×4-mm QFN Package
  • Energy Star Low Iq
    • < 10 µA Off-state Discharge Current
    • < 1.5 mA Off-state Input Quiescent Current
  • APPLICATIONS
    • Notebook and Netbook Computers
    • Portable Data-Capture Terminals
    • Portable Printers
    • Medical Diagnostics Equipment
    • Battery Bay Chargers
    • Battery Back-Up Systems

    • Детали

    Battery_type

    Li-Ion
    Operating_temperature

    -40 to 125 °C
    Specifications

    http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=BQ24704&&fileType=pdf
    Schedule_b

    8542390000
    Product_dimensions

    4 x 4 x 0.88 mm
    Pin_count

    24
    Output_voltage

    8 to 18 V
    Output_current

    10 A
    Supplier_package

    VQFN EP
    Msl_level

    2
    Бренд

    Mounting

    Surface Mount
    Max_processing_temp

    260
    Lead_finish

    Gold
    Kind

    Battery Charger
    Htsn

    8542390001
    Eccn

    EAR99
    Country_of_origin

    United States

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