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電池充電器 IC

BQ24725

現行

具 N 通道功率 MOSFET 選擇器的 SMBus 2-4 芯降壓電池充電器控制器

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產品規格表

BQ24725

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) 8 Vin (max) (V) 24 Cell chemistry Li-Ion/Li-Polymer 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 Input OVP, Power Path Vin (min) (V) 0 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 2, 3, 4 Charge current (max) (A) 8 Vin (max) (V) 24 Cell chemistry Li-Ion/Li-Polymer 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 Input OVP, Power Path Vin (min) (V) 0 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RGR) 20 12.25 mm² 3.5 x 3.5
  • SMBus Host-Controlled NMOS-NMOS Synchronous Buck Converter with
    Programmable 615kHz, 750kHz, and 885kHz Switching Frequencies
  • Automatic N-channel MOSFET Selection of System Power Source from
    Adapter or Battery Driven by Internal Charge Pumps
  • Enhanced Safety Features for Over Voltage Protection, Over Current
    Protection, Battery, Inductor and MOSFET Short Circuit Protection
  • Programmable Input Current, Charge Voltage, Charge Current Limits
    • ±0.5% Charge Voltage Accuracy up to 19.2V
    • ±3% Charge Current Accuracy up to 8.128A
    • ±3% Input Current Accuracy up to 8.064A
    • ±2% 20x Adapter Current or Charge Current Amplifier
      Output Accuracy
  • Programmable Battery Depletion Threshold, and Battery LERAN Function
  • Programmable Adapter Detection and Indicator
  • Integrated Soft Start
  • Integrated Loop Compensation
  • Real Time System Control on ILIM pin to Limit Charge Current
  • AC Adapter Operating Range 9V-24V
  • 5µA Off-State Battery Discharge Current
  • 20-pin 3.5 × 3.5 mm2 QFN Package
  • APPLICATIONS
    • Portable Notebook Computers, UMPC, Ultra-Thin Notebook, and Netbook
    • Personal Digital Assistant
    • Handheld Terminal
    • Industrial and Medical Equipment
    • Portable Equipment

PowerPAD is a trademark of Texas Instruments.
  • SMBus Host-Controlled NMOS-NMOS Synchronous Buck Converter with
    Programmable 615kHz, 750kHz, and 885kHz Switching Frequencies
  • Automatic N-channel MOSFET Selection of System Power Source from
    Adapter or Battery Driven by Internal Charge Pumps
  • Enhanced Safety Features for Over Voltage Protection, Over Current
    Protection, Battery, Inductor and MOSFET Short Circuit Protection
  • Programmable Input Current, Charge Voltage, Charge Current Limits
    • ±0.5% Charge Voltage Accuracy up to 19.2V
    • ±3% Charge Current Accuracy up to 8.128A
    • ±3% Input Current Accuracy up to 8.064A
    • ±2% 20x Adapter Current or Charge Current Amplifier
      Output Accuracy
  • Programmable Battery Depletion Threshold, and Battery LERAN Function
  • Programmable Adapter Detection and Indicator
  • Integrated Soft Start
  • Integrated Loop Compensation
  • Real Time System Control on ILIM pin to Limit Charge Current
  • AC Adapter Operating Range 9V-24V
  • 5µA Off-State Battery Discharge Current
  • 20-pin 3.5 × 3.5 mm2 QFN Package
  • APPLICATIONS
    • Portable Notebook Computers, UMPC, Ultra-Thin Notebook, and Netbook
    • Personal Digital Assistant
    • Handheld Terminal
    • Industrial and Medical Equipment
    • Portable Equipment

PowerPAD is a trademark of Texas Instruments.

The bq24725 is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.

The bq24725 uses two charge pumps to separately drive n-channel MOSFETs (ACFET, RBFET and BATFET) for automatic system power source selection.

SMBus controlled input current, charge current, and charge voltage DACs allow for high regulation accuracies that can be programmed by the system power management micro-controller.

The bq24725 uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

The bq24725 charges two, three or four series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm2 QFN package.

The bq24725 is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.

The bq24725 uses two charge pumps to separately drive n-channel MOSFETs (ACFET, RBFET and BATFET) for automatic system power source selection.

SMBus controlled input current, charge current, and charge voltage DACs allow for high regulation accuracies that can be programmed by the system power management micro-controller.

The bq24725 uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

The bq24725 charges two, three or four series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm2 QFN package.
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類型 標題 日期
* Data sheet 2-4Cell Li+ Battery SMBus Charge Controller with N-Channel Power MOSFET Selector datasheet (Rev. A) 2010年 11月 9日
Application note How to Review a Multicell Switching Charger Schematic 2011年 9月 21日

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支援軟體

SLUC202 — bq24725 EVM Setup

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產品
電池充電器 IC
BQ24725 — 具 N 通道功率 MOSFET 選擇器的 SMBus 2-4 芯降壓電池充電器控制器
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計算工具

SLUC203 — bq24725_725A_726_707_73x Calculation Tool

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產品
電池充電器 IC
BQ24707 — 具獨立式比較器和電路保護的 SMBus 1 到 4 芯降壓電池充電控制器 BQ24707A — 具獨立比較器和進階電路保護的 1 到 4 芯鋰離子電池充電控制器。 BQ24725 — 具 N 通道功率 MOSFET 選擇器的 SMBus 2-4 芯降壓電池充電器控制器 BQ24725A — 具 N 通道功率 MOSFET 選擇器的 SMBus 1-4 芯降壓電池充電器控制器 BQ24735 — 支援渦輪升壓模式的 SMBus 1-4 芯降壓電池充電控制器
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