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参数

Number of series cells 1, 2, 3, 4 Charge current (Max) (A) 5 Operating Vin (Max) (V) 24 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (Min) (V) 3 Battery charge voltage (Max) (V) 18.8 Absolute Vin (safety rating) (Max) ((V)) 30 Control topology Switch-Mode Buck-boost Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Power Path, USB C/PD compatible, USB D+/D-/BC1.2 integrated, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Operating Vin (Min) (V) 3.6 Rating Catalog open-in-new 查找其它 电池充电器IC

封装|引脚|尺寸

DSBGA (YBG) 56 10 mm² 2.897 x 3.317 open-in-new 查找其它 电池充电器IC

特性

  • High efficient synchronous Switch Mode buck-boost charger for 1-4 cell battery
    • 750-kHz and 1.5-MHz Programmable switching frequencies
    • Efficiency optimized for charging 2s battery, 96.5% efficiency with 9-V input and 94.5% efficiency with 15-V input at 3-A ICHG
    • Charging current up to 5 A with 10-mA resolution
  • Support wide range of input sources
    • 3.6-V to 24-V Wide input operating voltage range with 30-V absolute maximum rating
    • Maximum power tracking with VINDPM up to 22 V and IINDPM up to 3.3 A
    • Detect USB BC1.2, SDP, CDP, DCP, HVDCP and non-standard adapters
  • Dual-input power mux controller for source selection
  • High level integration
    • Four switching MOSFETs and BATFET
    • Input current and charging current sensing
  • Narrow-VDC (NVDC) Power Path management
  • Power USB port from battery (USB OTG)
    • 2.8-V to 22-V OTG output voltage with 10-mV resolution to support USB-PD PPS
    • OTG Output current regulation up to 3.32 A with 40-mA resolution
  • Flexible autonomous and I2C mode for optimal system performance
  • Integrated 16-bit ADC for voltage, current and temperature monitor
  • Low battery quiescent current
    • Typical 21-µA at battery only operation
    • Typical 600 nA in Charger Shutdown Mode
  • High accuracy
    • ±0.5% Charge voltage regulation for 2s battery
    • ±5% Charge current regulation
    • ±5% Input current regulation
  • Safety
    • Thermal regulation and thermal shutdown
    • Input/battery OVP and OCP
    • Converter MOSFETs OCP
    • Charging safety timer
  • Package
    • 56-Pin 2.9mm × 3.3mm WCSP

All trademarks are the property of their respective owners.

open-in-new 查找其它 电池充电器IC

描述

The BQ25790 is a fully integrated switch-mode buck-boost charger for 1-4 cell Li-ion battery and Li-polymer battery. The integration includes 4 switching MOSFETs (Q1, Q2, Q3, Q4), input and charging current sensing circuits, the battery FET (QBAT) and all the loop compensation of the buck-boost converter. It provides high power density and design flexibility to charge batteries across the full input voltage range for USB Type-C™ and USB power delivery (USB-PD) applications such as smart phone, tablet and other portable devices.

The charger supports the narrow VDC power path management, in which the system is regulated at a voltage slightly higher than the battery voltage, but not drop below the minimum system voltage. The system keeps operating even when the battery is completely discharged or removed. When load power exceeds input source rating, the battery gets into supplement mode and prevents the input source from being overloaded and the system from crashing.

The device charges a battery from a wide range of the input sources including legacy USB adapter to high voltage USB PD adapter and traditional barrel adapter. The charger automatically sets converter to be buck, boost or buck-boost configurations based on input voltage and battery voltage without the host control. The dual input source selector manages the power flowing from two different input sources. The inputs selection is controlled by the host through I2C with default source #1 (VAC1) as the primary input and the source #2 (VAC2) as the secondary input.

To support fast charging using adjustable high voltage adapter, the device provides D+/D- handshake. The device is compliant with USB 2.0 and USB 3.0 power delivery specification with input current and voltage regulation. In addition, the Input Current Optimizer (ICO) allows the detection of maximum power point of an unknown input source.

Besides the I2C host controlled charging mode, this charger also supports autonomous charging mode. After power up, the charging is enabled with default register settings. The device can complete a charging cycle without any software engagements. It detects battery voltage and charges the battery in different phases: trickle charging, pre-charging, constant current (CC) charging and constant voltage (CV) charging. At the end of the charging cycle, the charger automatically terminates when the charge current is below a pre-set limit (termination current) in the constant voltage phase. When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle.

In the absence of input sources, this device supports USB On-the-Go (OTG) function, discharging battery to generate an adjustable 2.8V~22V voltage on VBUS with 10mV step size, which is compliant to the USB PD 3.0 specification defined programmable power supply (PPS) feature.

The charger provides various safety features for battery charging and system operations, including battery temperature negative thermistor monitoring, trickle charge, pre-charge and fast charge timers and over-voltage/over-current protections on battery and input. The thermal regulation reduces charge current when the junction temperature exceeds a programmable threshold. The STAT output of the device reports the charging status and any fault conditions. The PG output indicates if a good power source is present. The INT pin immediately notifies host when fault occurs.

The device also provides a 16-bit analog-to-digital converter (ADC) for monitoring charge current and input/battery/system (VAC, VBUS, BAT, SYS, TS) voltages.

It is available in a 56-pin 2.9mm × 3.3mm WCSP package.

open-in-new 查找其它 电池充电器IC
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技术文档

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类型 标题 下载最新的英文版本 发布
* 数据表 BQ25790 I2C Controlled, 1-4 Cell, 5-A Buck-Boost Battery Charger with Dual-Input Selector and USB PD 3.0 OTG Output 数据表 2020年 6月 3日
白皮书 将降压-升压电池充电器和 USB Type-C™ 电源输送相结合,达到最大容量 下载英文版本 2020年 9月 2日
用户指南 BQ25790EVM (BMS027) User's Guide 2020年 7月 8日
技术文章 Maximize power density with buck-boost charging and USB Type C™ Power Delivery 2020年 6月 28日
技术文章 Universal and fast charging – a future trend for battery-powered applications 2020年 6月 26日
更多文献资料 BQ25790EVM EU Declaration of Conformity (DoC) 2020年 4月 28日
技术文章 When to use rechargeable batteries in small battery applications 2019年 10月 1日
技术文章 Transform the way you charge your devices with USB Type-C and PD 2017年 7月 18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
BQ25790EVM
BQ25790EVM
document-generic 用户指南
149
说明
BQ25790EVM 评估模块 (EVM) 是一款组装完备且经过测试的电路,用于评估 BQ25790 器件。BQ25790 是一款旨在用于 1-4 节锂离子和锂聚合物电池的集成式开关模式降压/升压电池充电管理器件。充电器采用窄 VDC 架构 (NVDC),即使电池完全放电,也能将系统调节至最小值。BQ25790 具有 USB 输入源检测、双输入源选择功能,支持 USB OTG,并且集成了一个 16 位多通道模数转换器 (ADC),是一套完整的充电解决方案。
特性
  • 同步开关模式降压/升压充电器,适用于 1-4 节电池配置,充电电流 5A,精度 10mA
  • 支持 3.6V 至 24V 宽范围输入源,具备 MPPT、USB 自动检测、USB PD 和无线输入功能
  • 双输入源选择器可驱动双向阻断 NFET
  • 使用电池 (USB OTG) 为 USB 端口供电,输出电压为 2.8V 至 22V,精度为 10mV
  • 电池静态电流低,仅使用电池工作时小于 5µA,充电器关断模式下小于 1µA
  • 此电路设计已经过测试,并包含 GUI 和用户指南

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

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