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 (T_J) and reduces the charge current once T_J increases to approximately 125°C. The bq24155 is available in 14-pin QFN package.

• 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

• Number of series cells
• 1
• Charge current (Max) (A)
• 1.25
• Operating Vin (Max) (V)
• 6
• Cell chemistry
• Li-Ion/Li-Polymer
• Battery charge voltage (Min) (V)
• 3.5
• Battery charge voltage (Max) (V)
• 4.44
• Absolute Vin (safety rating) (Max) ((V))
• 20
• Control interface
• I2C
• Features
• BAT temp thermistor monitoring (hot/cold profile), Input OVP
• Operating Vin (Min) (V)
• 4
• Rating
• Catalog

BQ24155的完整型号有：BQ24155RGYR、BQ24155RGYT，以下是这些产品的关键参数及官网采购报价：

BQ24155RGYR，工作温度：-40 to 85，封装：VQFN (RGY)-14，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ24155RGYR的批量USD价格：.57（1000+）

BQ24155RGYT，工作温度：-40 to 85，封装：VQFN (RGY)-14，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ24155RGYT的批量USD价格：.684（1000+）

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

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