BQ24155
- Charge Faster than Linear Chargers
- High-Accuracy Voltage and Current Regulation
- Input Current Regulation Accuracy: ±5% (100 mA and 500 mA)
- Charge Voltage Regulation Accuracy: ±0.5% (25°C), ±1% (0°C-125°C)
- Charge Current Regulation Accuracy: ±5%
- High-Efficiency Mini-USB/AC Battery Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs
- 20-V Absolute Maximum Input Voltage Rating
- 6-V Maximum Operating Input Voltage
- Built-In Input Current Sensing and Limiting
- Integrated Power FETs for Up To 1.25-A Charge Rate
- Programmable Charge Parameters through I2C Compatible Interface (up to 3.4 Mbps):
- Input Current
- Fast-Charge/Termination Current
- Charge Voltage (3.5 V to 4.44 V)
- Safety Timer with Reset Control
- Termination Enable
- Synchronous Fixed-Frequency PWM Controller Operating at 3 MHz with 0% to 99.5% Duty Cycle
- Automatic High Impedance Mode for Low Power Consumption
- Robust Protection
- Reverse Leakage Protection Prevents Battery Drainage
- Thermal Regulation and Protection
- Input/Output Overvoltage Protection
- Status Output for Charging and Faults
- USB Friendly Boot-Up Sequence
- Automatic Charging
- Power Up System without Battery
- 3.5 mm x 3.5 mm 14-Pin QFN Package
- APPLICATIONS
- Mobile and Smart Phones
- MP3 Players
- Handheld Devices
The bq24155 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I2C interface. The bq24155 integrates a synchronous PWM controller, power FETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.
The bq24155 charges the battery in three phases: conditioning, constant current and constant voltage. The input current is automatically limited to the value set by the host. Charge is terminated based on user-selectable minimum current level. A safety timer with reset control provides a safety backup for I2C interface. During normal operation, bq24155 automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status is reported to the host using the I2C compatible interface.
During the charging process, the bq24155 monitors its junction temperature (TJ) and reduces the charge current once TJ increases to approximately 125°C. The bq24155 is available in 14-pin QFN package.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance*** 数据表 | 2010-2-24 | |||
| 应用手册 | Building your own Battery Simulator | 2013-10-14 |
设计与开发
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）。
BQ24155EVM — 用于 BQ24155 完全集成开关模式单节锂离子充电器的评估模块
bq24155 评估模块是一块完整的充电器模块，用于评估紧凑、灵活、高效、USB 供能的开关模式充电管理解决方案，这些解决方案适用于各种便携式应用中使用的单节锂离子和锂聚合物电池。bq2415x 将同步 PWM 控制器、功率 MOSFET、输入电流感应、高准确度电流和电压调节以及充电终止功能集成到小型 WCSP 封装中。可通过 I²C 接口对充电参数进行编程。
BQ2415XSW-LINUX — 用于 BQ2415X 的 Linux 驱动程序
Linux 驱动程序支持 BQ2415x 系列完全集成的开关模式单节锂离子充电器。Linux 驱动程序支持通过 I2C 总线和接口与电源子系统进行通信。
Linux 主线状态
在 Linux 主线中提供：是
可通过 git.ti.com 获取：不适用
Linux 源文件
与该器件关联的文件为：
-
drivers/power/supply/bq2415x_charger.c
-
Documentation/devicetree/bindings/power/bq2415x.txt
-
include/linux/power/bq2415x_charger.h
源文件
BQ2415XEVM-SW — BQ2415x EVM Sowtware Setup
BQ2415x EVM 软件为 BQ24150/1 EVM 板提供软件接口。使用本软件通过 USB 接口适配器来更改 BQ24150/1 IC 寄存器。
下载：安装用于 BQ2415xEVM-SW 的软件
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| VQFN (RGY) | 14 | Ultra Librarian |