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单极霍尔磁控开关蓝牙耳机应用

磁控开关实现功能:
磁控式蓝牙耳机/TWS蓝牙耳机,使用单极性磁控开关,仓合开启,芯片输出高电平,耳机和手机蓝牙连接;仓合关闭,磁控开关输出低电平,耳机和手机蓝牙断开。


推荐磁控开关型号:
HAL257
HAL54N
HAL254
方案概述 应用框图 设计要点

        TWS蓝牙耳机,仓合开启,磁控开关输出高电平,耳机和手机蓝牙连接;仓合关闭,霍尔开关输出低电平。

蓝牙霍尔磁控开关


推荐型号:单极磁控开关HAL257

        耳机和手机蓝牙断开,由于空间较小,所以采用单极性磁控开关如:HAL257 HAL254 HAL54NCMOS技术的霍尔磁控开关,采用先进的斩波稳定技术,因而能够提供准确而稳定的磁开关点。

 

        TWS蓝牙耳机磁控开关低电压工作,其内部包括在单个硅芯片上:电压调节器,霍尔电压发生器,信号放大器,斩波稳定,施密特触发器,CMOS输出驱动器。非常低输入偏移误差的小部件,磁控开关需要单磁极的磁场操作。

 

磁控开关特点:

1.5uA的平均功耗

2.电压低至1.65V

3.单磁极触发,灵敏度高

蓝牙耳机霍尔磁控开关应用图                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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