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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance*** datasheet | 2010/2/24 | |||
| 應用說明 | Building your own Battery Simulator | 2013/10/14 |
設計與開發
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BQ24155EVM — 用於 BQ24155 完全整合切換模式單芯鋰離子充電器的評估模組
The bq24155 evaluation module is a complete charger module for evaluating compact, flexible, high-efficiency, USB-friendly switch-mode charge management solution for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The bq2415x integrates a synchronous PWM (...)
BQ2415XSW-LINUX — 適用於 BQ2415X 的 Linux 驅動程式
The Linux driver supports the BQ2415x series of fully integrated switch-mode one-cell Li-ion chargers. The Linux driver supports communication through the I2C bus and interfaces with the power supply sub-system.
Linux mainline status
Available in Linux mainline: Yes
Available through git.ti.com: (...)
BQ2415XEVM-SW — BQ2415x EVM Sowtware Setup
The BQ2415x EVM Software provides a software interface for the BQ24150/1 EVM boards. Use this software to change the BQ24150/1 IC registers via the USB Interface Adapter.
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RGY) | 14 | Ultra Librarian |