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参数

Number of series cells 1, 2, 3, 4 Charge current (Max) (A) 16.2 Operating Vin (Max) (V) 26 Cell chemistry Lead Acid, Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiCd, NiMH, SuperCap Battery charge voltage (Min) (V) 1.024 Battery charge voltage (Max) (V) 19.2 Absolute Vin (safety rating) (Max) ((V)) 32 Control topology Switch-Mode Buck-boost Control interface SMBus Features BAT temp thermistor monitoring (JEITA profile), BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Power Path, USB C/PD compatible, USB OTG integrated Operating Vin (Min) (V) 3.5 Rating Catalog open-in-new 查找其它 电池充电器IC

封装|引脚|尺寸

WQFN (RSN) 32 16 mm² 4 x 4 open-in-new 查找其它 电池充电器IC

特性

  • Pin-to-pin compatible to BQ25710
  • Buck-boost narrow voltage DC (NVDC) charger for USB-C Power Delivery (PD) interface platform
    • 3.5-V to 26-V input range to charge 1- to 4-cell battery
    • Charge current up to 16.2 A/8.1 A with 128-mA/64-mA resolution based on 5-mΩ/10-mΩ sensing resistor
    • Input current limit up to 10 A/6.35 A with 100-mA/50-mA resolution based on 5-mΩ/10-mΩ sensing resistor
    • Support USB 2.0, USB 3.0, USB 3.1 and USB Power Delivery (PD)
    • Input Current Optimizer (ICO) to extract max input power without overloading the adapter
    • Integrated Fast Role Swap (FRS) feature following USB-PD specification
    • Seamless transition between buck, buck-boost, and boost operations
    • Input current and voltage regulation (IINDPM and VINDPM) against source overload
  • TI patented switching frequency dithering pattern for EMI noise reduction
  • TI patented Pass Through Mode (PTM) for system power efficiency improvement and battery fast charging achieving 99% efficiency.
  • IMVP8/IMVP9 compliant system features for Intel platform
    • Enhanced Vmin Active Protection (VAP) mode supplements battery from input capacitors during system peak power spike following latest Intel specification
    • Comprehensive PROCHOT profile
    • Two level discharge current limit PROCHOT profile to avoid battery wire-out
    • System power monitor
  • Input and battery current monitor through dedicated pins
  • Integrated 8-bit ADC to monitor voltage, current and power
  • Battery MOSFET ideal diode operation in supplement mode to support system when adapter is fully loaded
  • Power up USB port from battery (USB OTG)
    • 3-V to 24-V OTG with 8-mV resolution
    • Output current limit up to 12.7 A/6.35 A with 100-mA/50-mA resolution based on 5-mΩ/10-mΩ sensing resistor
  • 800-kHz/1.2-MHz programmable switching frequency with 2.2-µH/1.0-µH inductor
  • SMBus host control interface for flexible system configuration
  • High accuracy for the regulation and monitor
    • ±0.5% Charge voltage regulation
    • ±3% Charge current regulation
    • ±2.5% Input current regulation
    • ±2% Input/charge current monitor
  • Safety
    • Thermal shutdown
    • Input, system, battery overvoltage protection
    • Input, MOSFET, inductor overcurrent protection
  • Package: 32-Pin 4.0 mm × 4.0 mm WQFN
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描述

The BQ25720 is a synchronous NVDC buck-boost battery charge controller to charge a 1- to 4-cell battery from a wide range of input sources including USB adapter, high voltage USB-C Power Delivery (PD) sources, and traditional adapters.

The NVDC configuration allows the system to be regulated based on battery voltage, but not drop below system minimum voltage. The system keeps operating even when the battery is completely discharged or removed. When load power exceeds input source rating, the battery goes into supplement mode and prevents the system from crashing.

During power up, the charger sets the converter to a buck, boost, or buck-boost configuration based on the input source and battery conditions. The charger seamlessly transitions between the buck, boost, and buck-boost operation modes without host control.

In the absence of an input source, the BQ25720 supports the USB On-the-Go (OTG) function from a 1- to 4-cell battery to generate an adjustable 3-V to 24-V output on VBUS with 8-mV resolution. The OTG output voltage transition slew rate can be configured to comply with the USB-PD 3.0 PPS specification.

When only a battery powers the system and no external load is connected to the USB OTG port, the BQ25720 implements the latest Intel Vmin Active Protection (VAP) feature, in which the device charges up the VBUS voltage from the battery to store some energy in the input decoupling capacitors. During a system peak power spike, the energy stored in the input capacitors supplements the system, to prevent the system voltage from dropping below the minimum system voltage and causing a system crash.

The BQ25720 monitors adapter current, battery current, and system power. The flexibly programmed PROCHOT output goes directly to the CPU for throttle back when needed.

The latest version of the USB-C PD specification includes Fast Role Swap (FRS) to ensure power role swapping occurs in a timely fashion so that the device(s) connected to the dock can avoid experiencing momentary power loss or glitching. This device integrates FRS in compliance with the PD specification.

TI patented switching frequency dithering pattern can significantly reduce EMI noise over the whole conductive EMI frequency range (150 kHz to 30 MHz). Multiple dithering scale options are available to provide flexibility for different applications to simplify EMI noise filter design.

The charger can be operated in the TI patented Pass Through Mode (PTM) to improve efficiency over the full load range. In PTM, input power is directly passed through the charger to the system. Switching losses of the MOSFETs and inductor core loss can be saved for high efficiency operation.

The BQ25720 is available in a 32-pin 4 mm × 4 mm WQFN package.

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功能与比较器件相同且具有相同引脚。
BQ25730 正在供货 具有电源路径和 USB-C™ PD OTG 的 I2C 1 至 5 节电池 NVDC 降压/升压电池充电控制器 This product is a 1-5-cell I2C buck-boost NVDC charge controller with power path and 400-kHz/800-kHz programmable switching frequency.

技术文档

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类型 标题 下载最新的英文版本 日期
* 数据表 BQ25720 SMBus 1- to 4-Cell Narrow VDC Buck-Boost Battery Charge Controller With System Power Monitor and Processor Hot Monitor 数据表 2021年 5月 25日
用户指南 BQ25720, BQ25730, BQ25730, BQ25731 (BMS035) Evaluation Module User's Guide 2021年 5月 19日
技术文章 When to use rechargeable batteries in small battery applications 2019年 10月 1日
技术文章 Should I use a linear charger or a switching charger? 2015年 10月 31日
技术文章 Summertime and the livin' is easy 2014年 6月 20日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

硬件开发

评估板 下载
document-generic 用户指南
149
说明
BQ25720 评估模块 (EVM) 是具有 N 沟道 MOSFET 选择器和电流监控功能的 SMBus 控制式 NVDC(窄电压直流)降压/升压充电控制器。降压转换器的输入电压范围为 3.5V 至 26V,并具有 1-4 节电池的可编程输出以及 64mA 至 8A 的充电输出电流范围。此 EVM 不含 EV2400 接口器件;如需评估 BQ25720 EVM,则须单独订购此器件。
特性
  • 主机控制型 NVDC 1 节至 4 节串联电池降压/升压充电器,具有 3.5V 至 26V 的输入、1V 至 19.2V 的充电输出以及 3V 至 24V 的 OTG 输出。
  • 支持 USB 2.0、USB 3.0、USB 3.1 (USB Type-C®) 和 USB 电源传输 (PD) 平台
  • 支持 5mΩ 电流感应电阻,可实现高电流和高效率
  • 获得 TI 专利的开关频率抖动模式,符合 IEC-CISPR 32 EMI 规范
  • TI 专利的直通模式 (PTM) 可达到 99% 的效率

软件开发

应用软件和框架 下载
Battery Management Studio (bqStudio) 软件套件
BQSTUDIO Battery Management Studio (bqStudio) 提供一整套稳健的工具来帮助您评估、配置、测试 TI 电池管理产品以及利用其进行设计或以其他方式对其加以利用。这包括提供对寄存器和数据内存的完全访问,其中包括支持实时查看、绘制和记录轻松连接以发送命令、控制低级通信和 I/O,以及自动和指导支持配置、校准、执行学习周期以及生成有用的文件以将器件投入生产。此外,Battery Management Studio 还为监测计开发套件 (bq27GDK000EVM) 提供自动化和脚本支持。
特性
  • 对 EV2300 和 EV2400 的支持
  • 用于监控基本寄存器的实时监测计仪表板
  • 完整的寄存器访问和记录
  • 完整的数据内存访问和记录
  • 产品配置和监控工具
  • 产品配置的导入和导出
  • 为器件的目标平台自定义器件的强大指导
  • 校准和测试自动化
  • 为目标生产环境导出 FS 文件
  • 用于自动化的监测计开发套件控制

CAD/CAE 符号

封装 引脚 下载
QFN (RSN) 32 了解详情

订购与质量

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/FIT 估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

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