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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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BQ24707

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产品详情

Number of series cells 1, 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) 4.5 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1, 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) 4.5 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
    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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类型 标题 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年 7月 31日
应用手册 Autonomous Smart Battery Guide PDF | HTML 2021年 10月 15日
应用手册 How to Review a Multicell Switching Charger Schematic 2011年 9月 21日

设计和开发

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

支持的产品和硬件

产品
电池充电器 IC
BQ24707 — 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 BQ24707A — 具有独立比较器和高级电路保护的 1 至 4 节锂离子电池充电控制器 BQ24725 — 具有 N 沟道功率 MOSFET 选择器的 SMBus 2 至 4 节降压电池充电控制器 BQ24725A — 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 BQ24735 — 用于支持涡轮加速升压模式的 SMBus 1 至 4 节降压电池充电控制器
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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。
测试报告: PDF
原理图: PDF
封装 引脚 下载
VQFN (RGR) 20 查看选项
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订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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