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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

VQFN-HR (RQM) 29 open-in-new 查找其它 电池充电器IC

特性

  • High power density, high integration buck-boost charger for 1-4 cell batteries supporting any USB PD 3.0 profile
    • Integrates four switching MOSFETs, BATFET
    • Integrates input and charging current sensing
  • Highly efficient
    • 750-kHz or 1.5-MHz switching frequencies
    • 5-A charging current with 10-mA resolution
      • 96.5% efficient: 16-V battery at 3A from 20V
  • Supports a 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 input voltage dynamic power management (VINDPM) up to 22 V and input current dynamic power management (IINDPM) up to 3.3 A
    • Detects USB BC1.2, SDP, CDP, DCP, HVDCP and non-standard adapters
  • Dual-input power mux controller (optional) for source selection
  • Narrow voltage DC (NVDC) power path management
  • Powers USB port from battery (USB OTG)
    • 2.8-V to 22-V OTG output voltage with 10-mV resolution to support USB-PD programmable power supply
    • 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 monitoring
  • Low battery quiescent current
    • 21 µA for battery only operation
    • 600 nA in Charger Shutdown Mode
  • High accuracy
    • +0.65% to -0.85% charge voltage regulation for 2s-4s batteries
    • ±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
    • 29-Pin 4 mm × 4 mm QFN
open-in-new 查找其它 电池充电器IC

描述

The BQ25792 is a fully integrated switch-mode buck-boost charger for 1-4 cell Li-ion batteries and Li-polymer batteries. 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 uses NVDC power path management, regulating the system slightly above the battery voltage without dropping below a configurable minimum system voltage. When system power exceeds the input source rating, battery supplement mode supports the system without overloading the input source. BQ25792supports the full input and output (OTG) voltage ranges for USB Type-C™ and USB power delivery (USB-PD) applications.

The charger supports the narrow VDC power path management, in which the system is regulated at a voltage slightly higher than the battery voltage without being allowed to drop below the minimum system voltage. The minimum system voltage allows the system to operate even when the battery is completely discharged or removed. When system power exceeds the input source rating, battery supplement mode supports the system power requirement without overloading the input source.

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 2.8-V to 22-V voltage on VBUS with 10-mV 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/overcurrent 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 29-pin 4mm × 4mm QFN package.

open-in-new 查找其它 电池充电器IC
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信息

更多信息

  • 如果您想使用符合通用标准、高达 20V 的 USB Type-C PD 端口为充电器供电,请考虑 TPS25750
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open-in-new 产品比较
功能与比较器件相同但引脚有所不同。
BQ25790 正在供货 集成式、NVDC、5A、1 至 4 节开关模式降压/升压电池充电器 This product is in a WCSP package

技术文档

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
The BQ25792 evaluation module (EVM) is used to evaluate the BQ25792 device. The BQ25792 is an integrated switched-mode buck-boost battery charge management device in HOTROD (QFN) package, intended for 1- to 4-series cell li-ion and li-polymer batteries from 3.6-V to 24-V input with programmable (...)
特性
  • Easily evaluate the high-efficiency 5-A switch-mode buck-boost charger in the HOTROD (QFN) package
  • Use of EV2400 interface to switch between charge and USB on-the-go (OTG) as well as monitor charger status and faults as well as voltages and current with an integrated analog-to-digital converter (ADC (...)
评估板 下载
document-generic 用户指南
149
说明

USB-PD-CHG-EVM-01 评估模块 (EVM) 用于同时评估 BQ25792 器件和 TPS25750 器件。BQ25792 是一款采用 HOTROD (QFN) 封装的集成式开关模式降压/升压电池充电管理器件,用于 1 至 4 节串联锂离子和锂聚合物电池,输入电压为 3.6V 至 24V。TPS25750 是一款 USB Type-C 和 PD 控制器,能够在内部提供和吸收 20V/5A(电压/电流)。I2C 串行接口允许 PD 控制器驱动电池充电器,并同时由主机驱动,从而使该组合成为真正灵活的解决方案。

特性
  • 轻松评估高效 5A 开关模式降压/升压充电器与具有集成开关的 USB Type-C 和 PD 控制器的组合。
  • 使用 Aardvark™ 连接器更改 PD 控制器闪存设置,以实现用户所需的配置。
  • 只需一个一次性闪存,即可在 PD 控制器和电池充电器之间使用板载内部 I2C 线对电池充电器进行编程。
  • 小尺寸解决方案,可实现使用两个所选集成电路的紧凑型设计。

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
应用软件和框架 下载
GUI software for use with USB2ANY and battery charging evaluation modules
TI-CHARGER-GUI — TI-CHARGER-GUI 提供基于网络的或独立的图形用户界面,可辅助评估、设计、配置或测试电池充电器产品。该软件可实现对寄存器的全面访问,并提供一个简单接口用于发送时序命令。
特性
  • 基于网络的或独立的 GUI 可轻松执行图形说明
  • 通过 USB2ANY 接口适配器配置支持的电池充电器评估模块 (EVM)
  • 便于浏览按功能分组排列的页面
  • 支持 I2C 或 SMBus 时序命令

参考设计

参考设计 下载
适用于 2 至 4 节电池的集成 USB Type-C® 电力输送 (PD) 和充电参考设计
TIDA-050047 在无需任何外部 FET 的情况下,此参考设计可提供高达 20V 的充电电压(电流为 5A),从而显著缩小解决方案尺寸并降低总 BOM 成本。同时,也不需要微处理器,因为 TPS25750 电力输送 (PD) 控制器将负责与 BQ25792 电池充电器 IC 的 I2C 通信。此 I2C 的功能以及 TPS25750 基于网络的 GUI 显著简化了固件开发过程。
document-generic 原理图 document-generic 用户指南

CAD/CAE 符号

封装 引脚 下载
VQFN-HR (RQM) 29 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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