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BQ24721C

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具有 SMBus 和系统功率选择器、软启动的智能电池充电器

产品详情

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) 9 Battery charge voltage (max) (V) 19.2 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Control interface SMBus Features IINDPM (Input current limit), 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) 9 Battery charge voltage (max) (V) 19.2 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Control interface SMBus Features IINDPM (Input current limit), Input OVP, Power Path Vin (min) (V) 0 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RHB) 32 25 mm² 5 x 5
  • High Efficiency NMOS-NMOS Synchronous Buck Converter With User-Selectable 300 kHz or 500 kHz frequency
  • bq24721C Offers Softer Turn-On, Stronger Turn-Off
  • SBS-Like(1) SMBus Interface for Control and Status Communications With Host
  • Programmable Battery Voltage, Charge Current, and AC Adapter Current via SBS-Like SMBus Interface
  • 0.4% Charge Voltage Regulation Accuracy
  • 3% Charge Current Regulation Accuracy
  • 3% Adapter Current Regulation Accuracy Dynamic Power Management (DPM)
  • 2% Accuracy Integrated Charge and AC Adapter 20× Current Amplifier Output
  • 3-Cell and 4-Cell Li-Ion Voltage Regulation 9 V, 12 V-14.4 V, 16 V-19.2 V
  • Battery Pack Voltage Operating Range 0 V-19.2 V
  • AC Adapter Operating Range 8 V-28 V
  • 99.5% Max Duty Cycle
  • Internal Soft Start
  • Integrated 5% 5-V LDO When AC Adapter Applied
  • 6-V Drive Supply Voltage for Increased Efficiency
  • Reverse Battery to Adapter Discharge Protection
  • Battery/Adapter to System Power Selector Function
  • Charge and Adapter Overcurrent Protection
  • Battery Thermistor Sense, TS, Comparators
  • Available in 32-Pin 5x5-mm QFN Package
  • APPLICATIONS
    • Portable Notebook Computers
    • Portable DVD Players
    • Webpads, PC Tablets

(1) SBS-Like interface is not 100% SBS compliant. SBS-Like interface is SMBus1.1 complaint but does not support Packet Error Correction (PEC). The control and status registers were changed to simplify and enhance notebook charger control. An 8-bit address (0x12) is used.
PowerPAD is a trademark of Texas Instruments.

  • High Efficiency NMOS-NMOS Synchronous Buck Converter With User-Selectable 300 kHz or 500 kHz frequency
  • bq24721C Offers Softer Turn-On, Stronger Turn-Off
  • SBS-Like(1) SMBus Interface for Control and Status Communications With Host
  • Programmable Battery Voltage, Charge Current, and AC Adapter Current via SBS-Like SMBus Interface
  • 0.4% Charge Voltage Regulation Accuracy
  • 3% Charge Current Regulation Accuracy
  • 3% Adapter Current Regulation Accuracy Dynamic Power Management (DPM)
  • 2% Accuracy Integrated Charge and AC Adapter 20× Current Amplifier Output
  • 3-Cell and 4-Cell Li-Ion Voltage Regulation 9 V, 12 V-14.4 V, 16 V-19.2 V
  • Battery Pack Voltage Operating Range 0 V-19.2 V
  • AC Adapter Operating Range 8 V-28 V
  • 99.5% Max Duty Cycle
  • Internal Soft Start
  • Integrated 5% 5-V LDO When AC Adapter Applied
  • 6-V Drive Supply Voltage for Increased Efficiency
  • Reverse Battery to Adapter Discharge Protection
  • Battery/Adapter to System Power Selector Function
  • Charge and Adapter Overcurrent Protection
  • Battery Thermistor Sense, TS, Comparators
  • Available in 32-Pin 5x5-mm QFN Package
  • APPLICATIONS
    • Portable Notebook Computers
    • Portable DVD Players
    • Webpads, PC Tablets

(1) SBS-Like interface is not 100% SBS compliant. SBS-Like interface is SMBus1.1 complaint but does not support Packet Error Correction (PEC). The control and status registers were changed to simplify and enhance notebook charger control. An 8-bit address (0x12) is used.
PowerPAD is a trademark of Texas Instruments.

The bq24721 is a high efficiency synchronous battery pack charger with high level of integration for portable applications. This device implements a high performance analog front-end that interfaces to the system power management micro-controller through a simplified SBS-like SMBus interface.

The dynamic power management (DPM) function modifies the charge current depending on system load conditions, avoiding ac adapter overload.

High accuracy current sense amplifiers enable accurate measurement of either the charge current or the ac adapter current, allowing termination of nonsmart packs and monitoring of overall system power.

The adapter isolation diode can be bypassed or entirely replaced with an external MOSFET using a control signal provided by the bq24721, thus reducing overall power dissipation.

Integrated features such as charger soft start, charge overcurrent protection, and IC temperature monitoring provide a second level of protection, in addition to pack and system protection functions.

The bq24721 is a high efficiency synchronous battery pack charger with high level of integration for portable applications. This device implements a high performance analog front-end that interfaces to the system power management micro-controller through a simplified SBS-like SMBus interface.

The dynamic power management (DPM) function modifies the charge current depending on system load conditions, avoiding ac adapter overload.

High accuracy current sense amplifiers enable accurate measurement of either the charge current or the ac adapter current, allowing termination of nonsmart packs and monitoring of overall system power.

The adapter isolation diode can be bypassed or entirely replaced with an external MOSFET using a control signal provided by the bq24721, thus reducing overall power dissipation.

Integrated features such as charger soft start, charge overcurrent protection, and IC temperature monitoring provide a second level of protection, in addition to pack and system protection functions.

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类型 标题 下载最新的英语版本 日期
* 数据表 Adv Multi-Chemistry & Mutli-Cell Sync Switch-Mode Charger & Syst Power Selector 数据表 (Rev. F) 2009年 4月 14日

设计和开发

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驱动程序或库

SLUC094 bq24721C Driver (USB EV2300) Installer

支持的产品和硬件

支持的产品和硬件

产品
电池充电器 IC
BQ24721C 具有 SMBus 和系统功率选择器、软启动的智能电池充电器
支持软件

SLUC095 bq2471C EVSW

支持的产品和硬件

支持的产品和硬件

产品
电池充电器 IC
BQ24721C 具有 SMBus 和系统功率选择器、软启动的智能电池充电器
封装 引脚 下载
VQFN (RHB) 32 查看选项

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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