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LN4913
CMOS 无极性高灵敏度微功耗霍尔开关
■ 产品概述
LN4913 是一款基于混合信号 CMOS 技术的无极性霍
尔开关,这款 IC 采用了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。
在电路设计上,LN4913 提供了一个内嵌的受控时钟机
制来为霍尔器件和模拟信号处理电路提供时钟源,同时这个
受控时钟机制可以发出控制信号使得消耗电流较大的电路周
期性的进入“休眠”模式;同样通过这个机制,芯片被周期
性的“唤醒”并且根据预定好的磁场强度阈值检测外界穿过
霍尔器件磁场强度的大小。如果磁通密度高于“操作点”阈
值或者低于“释放点”阈值,则开漏输出晶体管被驱动并锁
存成与之相对应的状态。而在“休眠”周期中,输出晶体管
被锁定在其先前的状态下。在电池供电应用中,这种设计对
于延长工作寿命提供了最好支持。
LN4913 的输出晶体管在面向封装标示一面存在一定强
南极或北极磁场时被锁定在开状态,而在无磁场时锁定在关
状态。
■ 产品概述
LN4913 是一款基于混合信号 CMOS 技术的无极性霍 尔开关,这款 IC 采用了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。 在电路设计上,LN4913 提供了一个内嵌的受控时钟机 制来为霍尔器件和模拟信号处理电路提供时钟源,同时这个 受控时钟机制可以发出控制信号使得消耗电流较大的电路周 期性的进入“休眠”模式;同样通过这个机制,芯片被周期 性的“唤醒”并且根据预定好的磁场强度阈值检测外界穿过 霍尔器件磁场强度的大小。如果磁通密度高于“操作点”阈 值或者低于“释放点”阈值,则开漏输出晶体管被驱动并锁 存成与之相对应的状态。而在“休眠”周期中,输出晶体管 被锁定在其先前的状态下。在电池供电应用中,这种设计对 于延长工作寿命提供了最好支持。 LN4913 的输出晶体管在面向封装标示一面存在一定强 南极或北极磁场时被锁定在开状态,而在无磁场时锁定在关 状态。
■ 额定工作参数
工作温度范围 TMIN ≤ TA ≤ TMAX −40°C ≤ TA ≤ 85°C 工作电压范围 1.65V ≤ VDD ≤ 6.0V
■ 产品特点
1.65V — 5.5V 电池应用
磁开关点的高灵敏度高稳定性
抗机械应力强
数字输出信号
无极性的开关
■ 用途
移动电话
笔记本电脑
便携电子设备等
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LN4916
LN4916 is with proprietary Hall effect plate and single CMOS output driver, mainly designed for battery–powered, hand-held equipment (such as Cellular and Cordless Phone, PDA). When south-pole of sufficient strength on chip or north-pole of sufficient strength under chip, the LN4916 will turn on the SOUT output. While the magnetic flux density (B) is larger than operate point BOP(s), the SOUT will be turned on (low), the output is held until B is lower than release point BRP(s), then turned off (high). -
LN4919
LN4919 is with proprietary Hall effect plate and single CMOS output driver, mainly designed for battery–powered, hand-held equipment (such as Cellular and Cordless Phone, PDA). When north-pole of sufficient strength on chip or south-pole of sufficient strength under chip, the LN4919 will turn on the OUT output. When south-pole of sufficient strength on chip or north-pole of sufficient strength under chip, the LN4919 will turn on the OUT output. LN4919 series have above two kinds Hall effect output, please select appropriate model for different application. While the magnetic flux density (B) is larger than operate point BOP, the OUT will be turned on (low), the output is held until B is lower than release point BRP, then turned off (high). -
LN4918
LN4918 is with proprietary Hall effect plate and single CMOS output driver, mainly designed for battery–powered, hand-held equipment (such as Cellular and Cordless Phone, PDA). When north-pole of sufficient strength on chip or south-pole of sufficient strength under chip, the LN4918 will turn on the OUT output. When south-pole of sufficient strength on chip or north-pole of sufficient strength under chip, the LN4918 will turn on the OUT output. LN4918 series have above two kinds Hall effect output, please select appropriate model for different application. While the magnetic flux density (B) is larger than operate point BOP, the OUT will be turned on (low), the output is held until B is lower than release point BRP, then turned off (high). -
LN245
LN245 是一款基于混合信号 CMOS 技术的无极性霍 尔开关,这款 IC 采用了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。 在电路设计上,LN245 提供了一个内嵌的受控时钟机制 来为霍尔器件和模拟信号处理电路提供时钟源,同时这个受 控时钟机制可以发出控制信号使得消耗电流较大的电路周期 性的进入“休眠”模式;同样通过这个机制,芯片被周期性 的“唤醒”并且根据预定好的磁场强度阈值检测外界穿过霍 尔器件磁场强度的大小。如果磁通密度高于“操作点”阈值 或者低于“释放点”阈值,则开漏输出晶体管被驱动并锁存 成与之相对应的状态。而在“休眠”周期中,输出晶体管被 锁定在其先前的状态下。 LN245 的输出晶体管在面向封装标示一面存在一定强 南极或北极磁场时被锁定在开状态,而在无磁场时锁定在关 状态。 -
LN4923
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