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电池充电器 IC

BQ24765

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具有集成 FET 的 SMBus 2 至 4 节降压电池充电控制器

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数据表

BQ24765

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数据表 立即订购

产品详情

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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类型 标题 下载最新的英语版本 日期
* 数据表 bq24765 SMBus-Controlled Multi-Chemistry Battery Charger With Integrated Power MOSFETs 数据表 (Rev. A) PDF | HTML 2015年 11月 25日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
用户指南 bq24765 (HPA349) user's guide (Rev. A) 2013年 10月 4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）。

评估板

BQ24765EVM — BQ24765 评估模块，适用于具有集成 FET 的 SMBus 控制的电池充电器

bq24765 评估模块是一块完整的充电器模块，用于评估使用 bq24765 器件的多节集成电源 MOSFET 同步笔记本充电器。它设计用于为锂离子或锂聚合物应用提供高达 8A 的充电电流。该充电电流可由类似 SBS 的 SMBus 接口编程。bq24765 针对小型电感器的频率为 700 kHz，具有专门与外部主机命令进行协作的高度集成的电池充电控制器。可通过类似 SBS 的 SMBus 接口编程充电电压、充电电流和输入电流。动态电源管理 (DPM) 功能根据系统负载情况修改充电电流，避免 AC 适配器过载。高准确度电流感应放大器能够准确测量出 AC 适配器电流，实现对整个系统电源的监控。

用户指南: PDF
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支持软件

SLVC309 — bq24765EVM software

支持的产品和硬件

支持的产品和硬件

产品
电池充电器 IC
BQ24765 — 具有集成 FET 的 SMBus 2 至 4 节降压电池充电控制器
硬件开发
评估板
BQ24765EVM — BQ24765 评估模块，适用于具有集成 FET 的 SMBus 控制的电池充电器
下载
封装 引脚 下载
VQFN (RUV) 34 查看选项
应遵守 TI 评估类商品的标准条款与条件。

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

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