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| 型号： | US5881LSE-AAA-000-RE |
| 厂商： | Melexis Technologies NV |
| 文件页数： | 32/46页 |
| 文件大小： | 498K |
| 描述： | IC HALL EFFECT SW |
| 标准包装： | 1 |
| 传感范围： | 30mT 跳闸，9.5mT 释放 |
| 类型： | 单极开关 |
| 电源电压： | 3.5 V ~ 24 V |
| 电流 - 电源： | 5mA |
| 电流 - 输出（最大）： | 50mA |
| 输出类型： | 数字式，开漏极 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | TO-236-3，SC-59，SOT-23-3 |
| 供应商设备封装： | SOT-23 |
| 包装： | 剪切带 (CT) |
| 产品目录页面： | 1460 (CN2011-ZH PDF) |
| 其它名称： | Q3295370 US5881LSE-ND US5881LSECT US5881LSECT-ND |
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Section 3 - Applications
3-18
Programmable Isolated Current Sensor
Hall Effect Sensors can be used in conjunction with an electromagnet to make a very efficient, isolated
current-sensing device. This can be used to protect components from damage such as overheating.
The only components needed, as in Figure 13, are a Hall IC and a slotted ferrite toroid core driving an
indicator, relay or a logic-level fault signal. The ideal Hall IC in this application is a programmable linear
device, which would allow accurate calibration of the sensor and also versatility. For example, the dia-
gram below shows a toroid with 4 turns of wire. If a current of 10A was applied to the coil, the field at
the sensor would be about 6mT. The Hall IC can be programmed to give the desired response to this mag-
netic range. If the desired voltage swing is 0.5V (or 500mV) and the magnetic swing is 6mT, then the
device can be programmed to
83mV/mT to give the correct
response.
By varying the number of
windings and the programming
codes, rages as small as 100mA
and as large as 500A can be
achieved.
If used with a linear Hall-Effect
sensor, the output voltage will
be proportional to the current
flowing through the windings
on the toroid. This Voltage can
be used to indicate current
level, or trigger a shut-down
circuit.
Current Indicator/Limiter
If only a current indicator or limiter is needed, a simple circuit can be built with a Hall switch, and requires
no programming. In Figure 13, each complete turn of coil around the core, with a current of 1 Amp flow -
ing through it, will produce a flux density of approximately .6 mT upon the Hall Effect Switch. By adjust-
ing the number of coil turns around the core, the Hall Effect switch can act as either a current indicator or
current limiter.
Example:
Under normal operation a current of 10 Amps is delivered to a motor by some wire. Wrapping four turns
of the wire around the core will produce a magnetic field of 24 mT upon the Hall IC, which will activate
the device to ON. This can be used to illuminate an LED to symbolizing normal current. The LED will
remain ON until the field drops to about 18mT or about 7.5 Amps.
To use as a limiter, simply drop one turn of wire, which will require a higher current to turn the Hall switch
ON. With 1 turn removed, the switch will require 13 Amps to turn ON, and will remain on until the cur-
rent level drops below 1Amp.
PTC
TM
Figure 18, Programmable Current Sensor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| US5881LSO | 功能描述:IC HALL EFFECT SW SOT-23 RoHS:否 类别:传感器，转换器 >> 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC) 系列:- 标准包装:1 系列:- 传感范围:20mT ~ 80mT 类型:旋转 电源电压:4.5 V ~ 5.5 V 电流 - 电源:15mA 电流 - 输出（最大）:- 输出类型:数字式，PWM，8.5 位串行 特点:可编程 工作温度:-40°C ~ 150°C 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:Digi-Reel® 其它名称:AS5132-HSST-500DKR |
| US5881LUA | 制造商:未知厂家 制造商全称:未知厂家 功能描述:CMOS Multi-Purpose Switch |
| US5881LUA-AAA-000-BU | 功能描述:IC HALL EFFECT SW MP TO-92UA RoHS:是 类别:传感器，转换器 >> 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC) 系列:- 标准包装:1 系列:- 传感范围:20mT ~ 80mT 类型:旋转 电源电压:4.5 V ~ 5.5 V 电流 - 电源:15mA 电流 - 输出（最大）:- 输出类型:数字式，PWM，8.5 位串行 特点:可编程 工作温度:-40°C ~ 150°C 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:Digi-Reel® 其它名称:AS5132-HSST-500DKR |
| US5A | 制造商:JINANJINGHENG 制造商全称:Jinan Jingheng (Group) Co.,Ltd 功能描述:Surface Mount ultra FAST Rectifier |
| US5A10AS17120 | 制造商:NEC 制造商全称:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER |
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