Texas Instruments 德州仪器 bq2510x 单节锂离子电池充电器集成电路
德州仪器 bq2510x 单节锂离子充电器集成电路是高度集成的锂离子和锂聚合物线性充电器，适用于空间受限的便携式应用。有输入过压保护的高输入电压范围支持低成本的非稳压适配器。bq2510x 只有一路功率输出来给电池充电。如果系统平均负载使电池不能在 10 小时的安全定时内充满，则可以加入一个系统负载与电池并联。电池充电分为三个阶段：调节、恒流、恒压。在这三个阶段，内部控制环路会监控集成电路结温，如果超出内部温度阈值，会降低充电电流。充电器的功率级和充电电流感应功能是完全集成的。充电器功能具有高精度电流和电压调节环路以及充电终止。预充电电流和终止电流阈值通过 bq2510x 上的一个外部电阻器进行编程。快速充电电流值也是通过一个外部电阻器进行编程的。
The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops and charge termination. The pre-charge current and termination current threshold are programmed via an external resistor on the Texas Instruments bq2510x. The fast charge current value is also programmable via an external resistor.
特性
- Supports Applications for Very Low Charge Currents - 10mA to 250mA
- Supports minimum 1mA Charge Termination Current
- Ultra-Low Battery Output Leakage Current - Maximum 75nA
- 30V Input Rating; with 6.5V Input Overvoltage Protection
- Input Voltage Dynamic Power Management
- Automatic Termination and Timer Disable Mode (TTDM) for Absent Battery Pack
- Available in Small 1.60mm × 0.90mm DSBGA Package
应用
- Fitness Accessories
- Smart Watches
- Bluetooth® Headsets
- Low-Power Handheld Devices
Typical Application
发布日期: 2014-10-03
| 更新日期: 2022-03-11