OCH145 极灵敏、单极HALL开关

4种霍尔开关hall ic的介绍及原理
霍尔开关Hall IC有四种类型：单极、双极、锁存和全极。

以下是它们的介绍和原理：
1. 单极霍尔开关：
这种类型的霍尔开关只能识别固定的磁极（通常是S极）。

当磁场靠近时，霍尔元件导通并输出低电平；当磁场远离时，霍尔元件关闭并输出高电平。

2. 双极霍尔开关：
双极霍尔开关需要两个磁极（N和S）来分别控制高低电平。

它利用磁场NS极交替来输出信号。

对不同磁极分别响应，一般为N极响应为高，S极响应为低。

3. 锁存霍尔开关：
这是双极霍尔开关的一种特殊形式，也称为锁定霍尔。

当S极靠近时开启，磁场离开后继续保持开启状态；只有当N极靠近时才会关闭，磁场移除后继续保持关闭状态，直到下次磁场改变。

这种保持上次状态的特性即锁存特性。

4. 全极霍尔开关（无极性霍尔开关）：
全极霍尔开关不分南极(S)北极(N)检测磁场，对任意磁极都响应，只要有磁场靠近就响应。

磁铁接近时输出低电平，远离时输出高电平。

以上内容仅供参考，如需了解更多信息，建议查阅相关文献或咨询专业人士。

有四品种型的开关霍尔传感器霍尔开关hall ic：单极、双极、锁存、全极霍尔开关的输出端是以磁感应强度B 来表征的，当B 值到达一定的水平（如B1）时，霍尔开关外部的触发器翻转，霍尔开关的输入电平形态也随之翻转。

输入端普通采用晶体管输入，和接近开关相似有NPN、PNP、常开型、常闭型、锁存型（双极性）、双信号输入之分。

霍尔开关具有无触电、低功耗、长运用寿命、呼应频率初等特点，外部采用环氧树脂封灌成一体化，因此能在各类恶劣环境下牢靠的任务。

霍尔开关可使用于接近开关，压力开关，里程表等，做为一种新型的电器配件。

单极霍尔：AH44E AH44L AH443 AH201 ATS137 AH543 S3144 S137 A3144 A04E A1101 用于无触点开关，汽车点火器，刹车电路，地位、转速检测与控制，平安报警安装，纺织控制零碎……双极霍尔AH513 AH3172 AH413 AH512 AH6851 AH173 AH175 S41 S73276 277 EW732 177 EW632 用于无触点开关，电机风扇线性霍尔：AH49E AH3503 SS495A SS496A A1321LUA A1321EUA 用于运动检测器，齿轮传感器，接近检测器，电流电压功率测量，厚度测量，电动车、汽车调速……全极性微功耗霍尔4913 AH3661 用于手机、水表、相机、笔记本电脑、手电筒……美国ALLEGRO A1104EU A1104EUA A1104LU A1104LUA A1104ELHLT 贴片23封装A1101EU A1101EUA A1101LU A1101LUA A1101ELT 贴片23封装A1102LLHLT 贴片23封装A3280LUA A1302EUA A1321LUA 美国HONEYWELL SS495A SS496A SS496B SS413A SS411A 日本AKE EW732 EW6321 EW512 HW302B HW322B （是HW302B的晋级产物）德国MELEXIS 17CA MLX90217A1104开关型霍尔的任务原理霍尔开关hall ic霍尔传感器的外形图和与磁场的作用关系。

常见的霍尔元件常见的霍尔元件有哪些种类，型号？单极性霍尔单极开关介绍:单极霍尔效应开关具有磁性工作阈值(Bop)。

如果霍尔单元承受的磁通密度大于工作阈值，那么输出晶体管将开启；当磁通密度降至低于工作阈值(Brp) 时，晶体管会关闭。

滞后(Bhys) 是两个阈值(Bop-Brp) 之间的差额。

即使存在外部机械振动及电气噪音，此内置滞后页可实现输出的净切换。

单极霍尔效应的数字输出可适应各种逻辑系统。

这些器件非常适合与简单的磁棒或磁杆一同使用。

Allegro 提供各种单极霍尔效应开关，各开关均具有与磁铁南极相关的不同工作阈值及滞后。

霍尔单极开关型号如下:类别品牌型号工作点（G）释放点（G）回差（G）工作电压工作温度单极霍尔开关AH AH3144E70~300 30~270 >30 4.5-24V -40-85℃AH AH3144L70~300 30~270 >30 4.5-24V -40-150℃AH AH54370~350 30~270 >30 4.5-24V -20-85℃DIODES ATS13770~300 30~270 >40 3.5-20V -40-85℃YH YH137<160 >20 60~80 4.5-24V -20-85℃YH YH3144E>30 <30 80 4.5-24V -20-85℃ALLEGRO A04E35~450 25~430 >20 3.8-24V -40-85℃ALLEGRO A1104EU-T35~450 25~430 >20 3.8-24V -40-85℃ALLEGRO A1104LU-T35~450 25~430 >20 3.8-24V -40-150℃ALLEGRO A1104EUA-T35~450 25~430 >20 3.8-24V -40-85℃AH3144E/L,霍尔开关集成电路应用霍尔效应原理，采用半导体集成技术制造的磁敏电路，它是由电压调整器、霍尔电压发生器、差分放大器、史密特触发器，温度补偿电路和集电极开路的输出级组成的磁敏传感电路，其输入为磁感应强度，输出是一个数字电压讯号。

hall开关原理
Hall开关是一种基于霍尔效应的电子开关。

霍尔效应是指当电流流过一个导电材料时，如果垂直于电流方向施加一个磁场，会在导电材料中产生一种电势差。

Hall开关利用这种电势差来控制开关状态。

Hall开关由霍尔传感器、放大器和开关电路组成。

当有磁场作用于霍尔传感器时，传感器产生的电势差会被放大器放大，然后经过开关电路控制开关状态。

当无磁场作用于霍尔传感器时，电势差较小，开关处于关闭状态；当有磁场作用于霍尔传感器时，电势差增大，开关被打开。

Hall开关具有以下优点：
1. 高可靠性：Hall开关没有机械接触，没有磨损和接触电阻，因此寿命较长，稳定性较高。

2. 快速响应：Hall开关的响应时间短，可以快速切换开关状态。

3. 低功耗：Hall开关工作时，只有在状态切换时才需要消耗能量，因此功耗较低。

4. 广泛应用：Hall开关可以应用于各种场景，如磁传感器、车辆传感器、工业自动化等。

总之，Hall开关利用霍尔效应实现开关控制，具有高可靠性、快速响应、低功耗等优点，广泛应用于各个领域。

MH254 SpecificationsMicropower CMOS Unipolar Hall Effect Switch MH254 Hall-effect sensor is a temperature stable, stress-resistant, Low Tolerance of Sensitivity micro-power switch. Superior high-temperature performance is made possible through a dynamic offset cancellation that utilizes chopper-stabilization. This method reduces the offset voltage normally caused by device over molding, temperature dependencies, and thermal stress.MH254 is special made for low operation voltage, 1.65V, to active the chip which is includes the following on a single silicon chip: voltage regulator, Hall voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, CMOS output driver. Advanced CMOS wafer fabrication processing is used to take advantage of low-voltage requirements, component matching, very low input-offset errors, and small component geometries. This device requires the presence of unipolar magnetic fields for operation.The package type is in a Halogen Free version has been verified by third party Lab.Features and Benefits●CMOS Hall IC Technology●Strong RF noise protection● 1.65 to 6V for battery-powered applications●Operation down to 1.65V,Unipolar Hall Switch Micro power consumption●High Sensitivity for reed switch replacement applications●Low sensitivity drift in crossing of Temp. range●Ultra Low power consumption at 5uA (Avg)●High ESD Protection, HBM > ±4KV( min )●Totem-pole outputApplications●Solid state switch●Handheld Wireless Handset Awake Switch ( Flip Cell/PHS Phone/Note Book/Flip Video Set)●Magnet proximity sensor for reed switch replacement in low duty cycle applications●Water Meter●PDA●PDVD●NB●Pad PCMH254 SpecificationsMicropower CMOS Unipolar Hall Effect SwitchPart No. Temperature Suffix Package TypeMH254EST E (-40℃ to + 85℃)ST (TSOT-23)Custom sensitivity selection is available by MST sorting technologyFunctional DiagramNote: Static sensitive device; please observe ESD precautions. Reverse V DD protection is not included. For reverse voltage protection, a 100Ω resistor in series with V DD is recommended.MH254, HBM > ±4KV which is verified by third party lab.Note: Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute maximum- rated conditions for extended periods may affect device reliability.Electrical SpecificationsDC Operating Parameters：Ta=25℃, V DD=1.8VC1：10nFC2：100pF Typical application circuitSensor Location, package dimension and markingMH254 Package。

OH44E Unipolar Hall Effect Switch ICGeneral Description:Part No.:OH44E Operate temperature:-40～125℃Package:1000pcs/BagFeaturesHigh load capacityThe good consistencya wide range of power supply voltagehigh reliabilityAbsolute Maximum Ratings（T A=25℃）Supply Voltage V CC··············4-30VOutput Current I O···················50mAOperating Temperature Range T A········-40～150℃Storage Temperature RangeT S················-65～150℃Typical Working ModeApplicationsThe brushless DC motor,DC fans,DC water pumpThe home appliance control panelsewing equipment,textile machineryspeed sensor,position detecting,counting andThe flow sensor,flow meterThe auto ignition,safety alarm deviceother industrial control fieldMagnetic-electrical Transfer Characteristics Functional Block Diagram：REGm AMPPin1.V CCPin3.VoutPin2.GND V OUTB HB RP B OP BV OHV OLOH44E unipolar hall IC includes an on-chip Hall voltage generator for magnetic sensing,anamplifier that amplifies the Hall voltage,a schmitt trigger to provide switching hysteresis fornoise rejection,and an open-collector output.It detects the changes of Magnetic field andoutput a digital voltage signal.With the typical feature of wide range of working Voltage,operate temperature and high load capicity,OH44E performs well in many application,suchas position control,speed detection and flow detetion as an non-contact magnetic sensor.Electrical Characteristics(Ta=25°C)Parameter Symbol ConditionsValueUnit Min Typ MaxSupply Voltage V CC4-30VOutput Saturation Voltage V OL Vcc=4.5V,Iout=20mA，B≥B OP-200400mVOutput Leakage Current I OH Vout=24V，B≤B RP- 1.010μA Supply Current I CC V CC=Vccmax OC output-5-mAOutput Rise Time t r Vcc=12V,RL=820Ω,C L=20pF -0.5-μSOutput Falling Time t f-0.5-μS Magnetic Characteristics(Ta=25°C)(1mT=10Gauss)Parameter symbolValueUnit Min Typ MaxOperate Point B OP--20mT Release Point B RP3--mT Hysteresis B H5-7mTDimension（unit:mm)Pin Descriptions：1.V CC2.GND3.VoutTypical Application CuicuitsPrecautions OH Series Hall ICSHall ICs are sensitive devices which performance could be influenced in some extent by magnetic, optical,thermal and mechanical stress.1)A pull-up resistor RL should be connected between the power supply(Vcc)and the output(Vout) Since most of hall ICs are open collector output(OC output)circuits.Such as OH44E,OH137,OH513, OH543.Hall ICs with Build-in Resistor are not necessary to add one,for example OH921.2)Avoid reversing the power supply(Vcc)and the output(Vout)and overload use.Be careful of the burn and damage caused by instant large current and instantaneous high voltage.3)The Protection circuit should be added in the test cuicuits of hall ICS,such as large capacitor and a voltage stabilizing diode,which could absorb the effects of the external circuit and power fluctuation.4)Try to minimise the mechanical stress applied to the device and leads during the installation, especially on the pins where close to the root of the device when bending shaping etc.5)Strictly regulate the welding temperature and time(lead-free welding process reference).When manual welding,the temperature of soldering iron shall not exceed260degrees and time should be less than3seconds..6)When designing,please fully consider the influence factors of temperature,magnetic field attenuation, the movement way,etc.。