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电池充电器 IC

BQ24707

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具有独立比较器和高级电路保护的 SMBus 1 至 4 节降压电池充电控制器

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open-in-new 比较替代产品
功能优于比较器件，可直接替换。
BQ24725A 正在供货 具有 N 沟道功率 MOSFET 选择器的 SMBus 1 至 4 节降压电池充电控制器 This is a lower quiescent current alternative.

BQ24707

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产品详情

Rating Catalog Number of series cells 1, 2, 3, 4 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 8 Features Input OVP, Power Path Vin (min) (V) 4.5 Vin (max) (V) 24 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 1.024 Battery charge voltage (max) (V) 19.2 Control interface SMBus Operating temperature range (°C) -40 to 85
Rating Catalog Number of series cells 1, 2, 3, 4 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 8 Features Input OVP, Power Path Vin (min) (V) 4.5 Vin (max) (V) 24 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 1.024 Battery charge voltage (max) (V) 19.2 Control interface SMBus Operating temperature range (°C) -40 to 85
VQFN (RGR) 20 12.25 mm² (3.5 mm × 3.5 mm)
  • SMBus Host-Controlled NMOS-NMOS
    Synchronous Buck Converter With Programmable
    615 kHz, 750 kHz, and 885 kHz Switching
    Frequency
  • Real-Time System Control on ILIM Pin to Limit
    Charge Current
  • Enhanced Safety Features for Overvoltage
    Protection, Overcurrent Protection, Battery,
    Inductor, and MOSFET Short-Circuit Protection
  • Programmable Input Current, Charge Voltage,
    Charge Current Limits
    • ±0.5% Charge Voltage Accuracy up to 19.2 V
    • ±3% Charge Current Accuracy up to 8.128 A
    • ±3% Input Current Accuracy up to 8.064 A
    • ±2% 20× Adapter Current or Charge Current
      Output Accuracy
  • Programmable Adapter Detection and Indicator
  • Independent Comparator With Internal Reference
  • Integrated Soft-Start
  • Integrated Loop Compensation
  • AC Adapter Operating Range 5 V to 24 V
  • 15-µA Off-State Battery Discharge Current
  • 20-pin 3.5 mm × 3.5 mm QFN Package
  • bq24707: ACOK Delay Default 1.3 s
  • bq24707A: ACOK Delay Default 1.2 ms
  • APPLICATIONS
    • Portable Notebook Computers, UMPCs, Ultra-Thin
      Notebooks, and Netbooks
    • Personal Digital Assistants
    • Handheld Terminals
    • Industrial and Medical Equipment
    • Portable Equipment

All other trademarks are the property of their respective owners
  • SMBus Host-Controlled NMOS-NMOS
    Synchronous Buck Converter With Programmable
    615 kHz, 750 kHz, and 885 kHz Switching
    Frequency
  • Real-Time System Control on ILIM Pin to Limit
    Charge Current
  • Enhanced Safety Features for Overvoltage
    Protection, Overcurrent Protection, Battery,
    Inductor, and MOSFET Short-Circuit Protection
  • Programmable Input Current, Charge Voltage,
    Charge Current Limits
    • ±0.5% Charge Voltage Accuracy up to 19.2 V
    • ±3% Charge Current Accuracy up to 8.128 A
    • ±3% Input Current Accuracy up to 8.064 A
    • ±2% 20× Adapter Current or Charge Current
      Output Accuracy
  • Programmable Adapter Detection and Indicator
  • Independent Comparator With Internal Reference
  • Integrated Soft-Start
  • Integrated Loop Compensation
  • AC Adapter Operating Range 5 V to 24 V
  • 15-µA Off-State Battery Discharge Current
  • 20-pin 3.5 mm × 3.5 mm QFN Package
  • bq24707: ACOK Delay Default 1.3 s
  • bq24707A: ACOK Delay Default 1.2 ms
  • APPLICATIONS
    • Portable Notebook Computers, UMPCs, Ultra-Thin
      Notebooks, and Netbooks
    • Personal Digital Assistants
    • Handheld Terminals
    • Industrial and Medical Equipment
    • Portable Equipment

All other trademarks are the property of their respective owners

The bq24707 and bq24707A devices are high-efficiency, synchronous battery chargers, offering low component count for space-constrained, multi-chemistry battery charging applications.

SMBus controlled 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.

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

The IC provides an IFAULT output to alarm if any MOSFET fault or input over current occurs. This alarm output allows users to turn off input power selectors when the fault occurs. Meanwhile, an independent comparator with internal reference is available to monitor input current, output current, or output voltage.

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

The bq24707 and bq24707A devices are high-efficiency, synchronous battery chargers, offering low component count for space-constrained, multi-chemistry battery charging applications.

SMBus controlled 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.

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

The IC provides an IFAULT output to alarm if any MOSFET fault or input over current occurs. This alarm output allows users to turn off input power selectors when the fault occurs. Meanwhile, an independent comparator with internal reference is available to monitor input current, output current, or output voltage.

The IC charges one-, two-, three-, or four-series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm QFN package.
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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 bq24707x 1-4 Cell Li+ Battery SMBus Charge Controller With Independent Comparator and Advanced Circuit Protection 数据表 (Rev. C) PDF | HTML 2015-7-31
应用手册 Autonomous Smart Battery Guide PDF | HTML 2021-10-15
应用手册 How to Review a Multicell Switching Charger Schematic 2011-9-21

设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

计算工具

SLUC203 — bq24725_725A_726_707_73x Calculation Tool

支持的产品和硬件
参考设计

TIDA-00038 — 多节同步开关模式的参考设计

该参考设计是一套完整的充电器模块，可使用 bq24707 器件对多节（1 到 4 节）同步笔记本电脑充电器进行评估。它设计用于为锂离子或锂聚合物应用提供高达 4A 的充电电流。该充电电流可由 SMBus 接口通过 EV2300 接口板编程。该参考设计未随附 EV2300 接口板，因此必须单独订购。该设计中包括高效率的同步电池充电器，组件数量非常少，适用于空间有限的多化学物电池充电应用。可通过 SMBus 接口对充电电压、充电电流、输入电流和灵活充电选项进行编程。
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
VQFN (RGR) 20 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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