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电池充电器 IC

BQ24735

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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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数据表

BQ24735

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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 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 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)
  • Adapter and Battery Provide Power to System
    Together to Support Intel® CPU Turbo Boost
    Mode
  • SMBus Host-Controlled NMOS-NMOS
    Synchronous Buck Converter With Programmable
    615-, 750-, and 885-kHz Switching Frequencies
  • Automatic N-Channel MOSFET Selection of
    System Power Source From Adapter or Battery
    Driven by Internal Charge Pumps
  • 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
      Amplifier Output Accuracy
  • Programmable Battery Depletion Threshold, and
    Battery LEARN Function
  • Programmable Adapter Detection and Indicator
  • Integrated Loop Compensation and Soft Start
  • Real-Time System Control on ILIM Pin to Limit
    Charge Current
  • AC Adapter Operating Range: 4.5 V to 24 V
  • 5-µA Off-State Battery Discharge Current
  • 0.65 mA (0.8 mA Max) Adapter Standby
    Quiescent Current
  • Adapter and Battery Provide Power to System
    Together to Support Intel® CPU Turbo Boost
    Mode
  • SMBus Host-Controlled NMOS-NMOS
    Synchronous Buck Converter With Programmable
    615-, 750-, and 885-kHz Switching Frequencies
  • Automatic N-Channel MOSFET Selection of
    System Power Source From Adapter or Battery
    Driven by Internal Charge Pumps
  • 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
      Amplifier Output Accuracy
  • Programmable Battery Depletion Threshold, and
    Battery LEARN Function
  • Programmable Adapter Detection and Indicator
  • Integrated Loop Compensation and Soft Start
  • Real-Time System Control on ILIM Pin to Limit
    Charge Current
  • AC Adapter Operating Range: 4.5 V to 24 V
  • 5-µA Off-State Battery Discharge Current
  • 0.65 mA (0.8 mA Max) Adapter Standby
    Quiescent Current

The bq24735 device is a high-efficiency, synchronous battery charger, offering low component count for space-constrained, multichemistry battery charging applications. The bq24735 device supports turbo boost by allowing battery discharge energy to the system when system power demand is temporarily higher than the adapter maximum power level so the adapter will not crash.

The bq24735 device 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 digital-to-analog converters (DACs) allow for very high-regulation accuracies that can be easily programmed by the system power management microcontroller.

The bq24735 device uses an internal input current register or an external ILIM pin to throttle down PWM modulation to reduce the charge current. The bq24735 device charges 1-, 2-, 3-, or 4-series Li+ cells.

The bq24735 device is a high-efficiency, synchronous battery charger, offering low component count for space-constrained, multichemistry battery charging applications. The bq24735 device supports turbo boost by allowing battery discharge energy to the system when system power demand is temporarily higher than the adapter maximum power level so the adapter will not crash.

The bq24735 device 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 digital-to-analog converters (DACs) allow for very high-regulation accuracies that can be easily programmed by the system power management microcontroller.

The bq24735 device uses an internal input current register or an external ILIM pin to throttle down PWM modulation to reduce the charge current. The bq24735 device charges 1-, 2-, 3-, or 4-series Li+ cells.
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技术文档

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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 bq24735 1- to 4-Cell Li+ Battery SMBus Charge Controller for Supporting Turbo Boost Mode With N-Channel Power MOSFET Selector 数据表 (Rev. B) PDF | HTML 2015-4-29
应用手册 Autonomous Smart Battery Guide PDF | HTML 2021-10-15
模拟设计期刊 2012 年第 1 季度刊模拟应用学报 2012-1-31
模拟设计期刊 涡轮增压充电器支持 CPU 涡轮模式 2012-1-31

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）。

评估板

BQ24735EVM-710 — BQ24735 1 到 4 节锂离子电池 SMBus 充电控制器评估模块

BQ24735EVM-710 评估模块 (EVM) 是完整的充电器模块，用于评估使用 bq24735 器件的多节同步笔记本 Turbo 升压充电器。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，BQ24735EVM-710 不包括 EV2300 接口板。为评估 BQ24735EVM-710，用户必须单独订购 EV2300 接口板

用户指南: PDF
支持的产品和硬件
有库存
限制：
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无货
驱动程序或库

BQ24735SW-LINUX — 用于 BQ24735 的 Linux 驱动程序

Linux 驱动程序支持 BQ24735 1-4 节锂离子电池充电控制器。Linux 驱动程序支持通过 I2C 总线和接口与电源子系统进行通信。

 

Linux 主线状态

在 Linux 主线中提供：是
可通过 git.ti.com 获取：不适用 

Linux 源文件

与该器件关联的文件为：

  1. drivers/power/supply/bq24735-charger.c
  2. Documentation/devicetree/bindings/power_supply/ti,bq24735.txt
  3. include/linux/power/bq24735-charger.h

源文件

(...)
支持的产品和硬件
评估模块 (EVM) 用 GUI

SLUC258 — bq24725A/735/728/738 SMBus Gui

支持的产品和硬件
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-00039 — 1 至 4 节锂离子电池 SMBus 充电控制器的参考设计

该参考设计是一套完整的充电器模块，可使用 bq24735 器件对多节同步笔记本电脑涡轮升压充电进行评估。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 接口板进行编程。该参考设计不随附 EV2300 接口板。要评估该解决方案，用户必须单独订购 EV2300 接口板。
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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