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電池充電器 IC

BQ24765

現行

具整合式 FET 的 SMBus 2-4 芯降壓電池充電控制器

立即訂購
產品規格表

BQ24765

現行
產品規格表 立即訂購

產品詳細資料

Number of series cells 2, 3, 4 Charge current (max) (A) 10 Vin (max) (V) 24 Cell chemistry Lead Acid, Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiCd, NiMH Battery charge voltage (min) (V) 1.024 Battery charge voltage (max) (V) 19.2 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Control interface SMBus Features IC thermal regulation, IINDPM (Input current limit), Power Path Vin (min) (V) 7 Rating Catalog Operating temperature range (°C) -40 to 155
Number of series cells 2, 3, 4 Charge current (max) (A) 10 Vin (max) (V) 24 Cell chemistry Lead Acid, Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiCd, NiMH Battery charge voltage (min) (V) 1.024 Battery charge voltage (max) (V) 19.2 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Control interface SMBus Features IC thermal regulation, IINDPM (Input current limit), Power Path Vin (min) (V) 7 Rating Catalog Operating temperature range (°C) -40 to 155
VQFN (RUV) 34 24.5 mm² 7 x 3.5
  • Integrated Power MOSFETs, NMOS-NMOS,
    Synchronous Buck Converter
  • >95% Efficiency
  • Frequency 700kHz Allows Smaller Inductor (5 mm
    × 5 mm)
  • Thermal Regulation Loop for Safety, Limit TJ =
    120°C
  • Adaptive 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
    • Integrated Power MOSFETs
    • Input Current Comparator
    • Internal Soft-Start
  • Safety
    • Thermal Regulation Loop and Thermal
      Shutdown
    • Dynamic Power Management (DPM)
    • Power FETs Over Current Protection
  • 7 V–24 V AC/DC-Adapter Operating Range
  • Simplified SMBus Control
    • 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
    • AC/DC Adapter Present With Adjustable
      Voltage Threshold
    • Input Current Comparator, With Adjustable
      Threshold and Hysteresis
    • Current Sense Amplifier for Current Drawn
      From Input Source
  • Charge Any Battery Chemistry: Li+, LiFePO4,
    NiCd, NiMH, Lead Acid (2, 3, and 4 Li-Ion Cells)
  • Charge Enable Pin (CE)
  • Energy Star Low Iq
    • < 10-µA Battery Current with Adapter
      Removed
    • < 1 mA Input DCINA Current When Adapter
      Present and Charge Disabled
  • 34-pin, 3.50 mm × 7.00 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

All other trademarks are the property of their respective owners
  • Integrated Power MOSFETs, NMOS-NMOS,
    Synchronous Buck Converter
  • >95% Efficiency
  • Frequency 700kHz Allows Smaller Inductor (5 mm
    × 5 mm)
  • Thermal Regulation Loop for Safety, Limit TJ =
    120°C
  • Adaptive 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
    • Integrated Power MOSFETs
    • Input Current Comparator
    • Internal Soft-Start
  • Safety
    • Thermal Regulation Loop and Thermal
      Shutdown
    • Dynamic Power Management (DPM)
    • Power FETs Over Current Protection
  • 7 V–24 V AC/DC-Adapter Operating Range
  • Simplified SMBus Control
    • 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
    • AC/DC Adapter Present With Adjustable
      Voltage Threshold
    • Input Current Comparator, With Adjustable
      Threshold and Hysteresis
    • Current Sense Amplifier for Current Drawn
      From Input Source
  • Charge Any Battery Chemistry: Li+, LiFePO4,
    NiCd, NiMH, Lead Acid (2, 3, and 4 Li-Ion Cells)
  • Charge Enable Pin (CE)
  • Energy Star Low Iq
    • < 10-µA Battery Current with Adapter
      Removed
    • < 1 mA Input DCINA Current When Adapter
      Present and Charge Disabled
  • 34-pin, 3.50 mm × 7.00 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

All other trademarks are the property of their respective owners

The bq24765 is a high-efficiency, synchronous battery charger with two integrated 30-mΩ NMOS power MOSFETs, and an integrated input current comparator, offering low component count for space-constraint, multi-chemistry battery charging applications. Input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller using SMBus. The bq24765 has switching frequency of 700 kHz. The bq24765 charges 2, 3, or 4 series Li+ cells, and is available in a 34-pin, 3.50 mm × 7.00 mm VQFN package.

The bq24765 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. A high-accuracy current sense amplifier enables accurate measurement of input current from the AC adapter, allowing monitoring the overall system power. If the adapter current is above the programmed low-power threshold, a signal is sent to host so that the system optimizes its power performance according to what is available from the adapter. An integrated comparator allows monitoring the input current through the current sense amplifier, and indicating when the input current exceeds a programmable threshold limit. The bq24765 features a thermal regulation loop to reduce battery charge current when the Tj limit is reached. This feature protects internal power FETs from overheating when charging with high current.

The bq24765 is a high-efficiency, synchronous battery charger with two integrated 30-mΩ NMOS power MOSFETs, and an integrated input current comparator, offering low component count for space-constraint, multi-chemistry battery charging applications. Input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller using SMBus. The bq24765 has switching frequency of 700 kHz. The bq24765 charges 2, 3, or 4 series Li+ cells, and is available in a 34-pin, 3.50 mm × 7.00 mm VQFN package.

The bq24765 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. A high-accuracy current sense amplifier enables accurate measurement of input current from the AC adapter, allowing monitoring the overall system power. If the adapter current is above the programmed low-power threshold, a signal is sent to host so that the system optimizes its power performance according to what is available from the adapter. An integrated comparator allows monitoring the input current through the current sense amplifier, and indicating when the input current exceeds a programmable threshold limit. The bq24765 features a thermal regulation loop to reduce battery charge current when the Tj limit is reached. This feature protects internal power FETs from overheating when charging with high current.
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類型 標題 日期
* Data sheet bq24765 SMBus-Controlled Multi-Chemistry Battery Charger With Integrated Power MOSFETs datasheet (Rev. A) PDF | HTML 2015年 11月 25日
User guide bq24765 (HPA349) user's guide (Rev. A) 2013年 10月 4日
Application note How to Review a Multicell Switching Charger Schematic 2011年 9月 21日

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開發板

BQ24765EVM — 適用於具有整合 FET 的 SMBus 控制的電池充電器的 BQ24765 評估模組

The bq24765 evaluation module is a complete charger module for evaluating a multi cell integrated power MOSFETs synchronous notebook charge using the bq24765 devices. It is designed to deliver up to 8A of charge current to Li-Ion or Li-Pol applications. The charge current is programmable by (...)

使用指南: PDF
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SLVC309 — bq24765EVM software

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產品
電池充電器 IC
BQ24765 — 具整合式 FET 的 SMBus 2-4 芯降壓電池充電控制器
硬體開發
開發板
BQ24765EVM — 適用於具有整合 FET 的 SMBus 控制的電池充電器的 BQ24765 評估模組
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