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光耦合器或光隔离器是一种包含发光二极管（LED）和光电传感器（光电检测器，例如光敏电阻，光电二极管，光电晶体管等）的设备。光耦合器的目的是将信号从一个电路传输到另一个电路，同时保持电流隔离。 在这里，我想向您展示如何检查光耦合... AQY214 SSR RELAY SPST-NO 120MA 0-400VAQY284EHAZ缺货？用先进光半导体光耦继电器APY214国产替换AC, DC0V ~ 400V4-SOPAQY284 SSR RELAY SPST-NO 120... AQY221T SSR RELAY SPST-NO 100MA 0-40VAQY2C1R3PZ缺货？用先进光半导体光耦继电器APY221T国产替换AC, DC0V ~ 40V4-SOPAQY221T SSR RELAY SPST-NO 30... AQY282 SSR RELAY SPST-NO 200MA 0-60VASSR-1218-003E缺货？用先进光半导体光耦继电器APY282国产替换AC, DC0V ~ 60V4-SOPAQY282 SSR RELAY SPST-NO 2... AQV212 SSR RELAY SPST-NO 600MA 0-60VASSR-1411-301E缺货？用先进光半导体光耦继电器APV212国产替换AC, DC0V ~ 60V6-SOPAQV212 SSR RELAY SPST-NO 6... AQY203 SSR RELAY SPST-NO 50MA 0-250VASSR-301C-003E缺货？用先进光半导体光耦继电器APY203国产替换AC, DC0V ~ 250V4-SOPAQY203 SSR RELAY SPST-NO ... AQY234 SSR RELAY SPST-NO 100MA 0-400VAQY284SX缺货？用先进光半导体光耦继电器APY234国产替换AC, DC0V ~ 400V4-SOPAQY214 SSR RELAY SPST-NO 100MA... HCPL4503是具有晶体管输出的双通道高速光耦合器。HCPL4503由与光学光电晶体管高速耦合的AIGaASLED组成。它可以在带宽为2MHz的情况下以1Mbit/s的速度切换。 特性和规格HCPL4503M •高速光... 什么是PLC？ PLC或可编程语言控制器是一种紧凑的工业计算机，旨在从一个位置控制系统过程。您可能听说过PLC，但尚未完全掌握该概念。PLC就像工业自动化设备的大脑。PLC控制器无需使用多个机器或工人来管理不同的系统和设备，而... AQY412 SSR RELAY SPST-NC 550MA 0-60VAQY412EHAZ缺货？用先进光半导体光耦继电器APY412国产替换AC, DC0V ~ 60V4-SOPAQY410 SSR RELAY SPST-NC 120MA... AQV252 SSR RELAY SPST-NO 200MA 0-60VASSR-1219-001E缺货？用先进光半导体光耦继电器APV252国产替换AC, DC0V ~ 60V6-DIPAQV252 SSR RELAY SPST-NO 2... AQW212 SSR RELAY SPST-NO 600MA 0-60VASSR-1420-002E缺货？用先进光半导体光耦继电器APW212国产替换AC, DC0V ~ 60V8-DIPAQV252 SSR RELAY SPST-NO 6... 光耦合器（光耦合器，英文缩写为OC）也称为光隔离器或光耦继电器，简称为光耦合器。它是一种通过光传输电信号的设备。通常，发光器件（红外发光二极管LED）和感光体（光敏半导体管）被封装在同一壳体中。当输入端添加电信号时，发光二极管发光。在接... AQY221 SSR RELAY SPST-NO 2A 0-40VC226S缺货？用先进光半导体光耦继电器APY221国产替换AC, DC0V ~ 40V4-SOPAQY221 SSR RELAY SPST-NO 2A 0-40VC226S... C347STR SSR RELAY SPST-NO 1A 0-80VC347STR缺货？用先进光半导体光耦继电器C347STR国产替换AC, DC0V ~ 80V8-SOPAQW212 SSR RELAY SPST-NO 100MA 0-6... 光耦合器是使用光能连接两个不同电路或将能量从一个电路传输到另一电路的组件。两个电路彼此完全电隔离，这意味着它们之间没有电连接。在本文中，我们将讨论光耦合器的类型，应用实例和电路图。 光耦合器也有一些不同的名称，例如光隔离器，光... AQY282 SSR RELAY SPST-NO 100MA 0-60VCPC1017NTR缺货？用先进光半导体光耦继电器APY282国产替换AC, DC0V ~ 60V4-SOPAQY282 SSR RELAY SPST-NO 100MA... AQY210 SSR RELAY SPST-NO 120MA 0-350VCPC1030N缺货？用先进光半导体光耦继电器APY210国产替换AC, DC0V ~ 350V4-SOPAQY210 SSR RELAY SPST-NO 120MA... 线性光耦合器简介！ 光学隔离是信号隔离的一种非常常见的形式。常用的光耦合器设备及其外围电路。由于光耦合器电路很简单，因此通常用于数字隔离电路或数据传输电路，例如UART协议的20mA电流环路。对于模拟信号，由于输入和输出的线形... 光耦合器（OpticalCoupler，英文缩写为OC）也称为光电隔离器，是指光电耦合器。光耦合器通过光学介质传输电信号。它对电信号的输入和输出具有良好的隔离效果，因此被广泛用于各种电路中。目前，它已经成为使用最广泛的光电器件之一。... Product line upA PhotoRelays is a semiconductor relay with an LED as an input and MOSFET as an output. |
| Compared with Electro-Mechanical Relays have moving contact: | Compared with SSR (Solid State Relays) have phototriac for output: |
|---|---|
| ●Longer lifetime (No limit on mechanical and electrical lifetime) ●Higher-speed and high-frequency switching ●Higher sensitivity (less power consumption) ●Smaller size ●Less contact problems such as arcs, bounce, and noise ●More resistant to vibration and impact ●No limitation for the mounting direction | ●Able to control miniature analog signal ●Applicable to both AC/DC ●More sensibility ●Less leakage current ●Lower offset voltage ●Various contact structures such as 2a, 4a, 1b, 2b, and 1a1b in addition to 1a |
1．Technical Terminology
2．Reliability tests
Term | Symbol | Description | |
Input | LED forward current | IF | Current that flows between the input terminals when the input diode is forward biased. |
LED reverse voltage | VR | Reverse breakdown voltage between the input terminals. | |
Peak forward current | IFP | Maximum instantaneous value of the forward current. | |
LED operate current | IFon | Current when the output switches on (by increasing the LED current) with a designated supply voltage and load connected between the output terminals. | |
LED turn off current | IFoff | Current when the output switches off (by decreasing the LED current) after operating the device with a designated supply voltage and load connected between the output terminals. | |
LED dropout voltage | VF | Dropout voltage between the input terminals due to forward current. | |
Power dissipation | Pin | Allowable power dissipation between the input terminals. | |
Output | Load voltage | VL | Supply voltage range at the output used to normally operate the PhotoRelays. Represents the peak value for AC voltages. |
Continuous load current | IL | Maximum current value that flows continuously between the output terminals of the PhotoRelays under designated ambient temperature conditions. Represents the peak value for AC current. | |
On resistance | Ron | Obtained using the equation below from dropout voltage VDS (on) between the output terminals (when a designated LED current is made to flow through the input terminals and the designated load current through the output terminals.) Ron ＝ VDS (on)/IL | |
Off state leakage current | ILeak | Current flowing to the output when a designated supply voltage is applied between the output terminals with no LED current flow. | |
Power dissipation | Pout | Allowable power dissipation between the output terminals. | |
Open-circuit output voltage | Voc | Voltage required for driving a MOSFET | |
Short-circuit current | Isc | Current that is output from the driver when the input is turned on | |
Electrical characteristics | Turn on time | Ton | Delay time until the output switches on after a designated LED current is made to flow through the input terminals. |
Turn off time | Toff | Delay time until the output switches off after the designated LED current flowing through the input terminals is cut off. | |
I/O capacitance | Ciso | Capacitance between the input and output terminals. | |
Output capacitance | Cout | Capacitance between output terminals when LED current does not flow. | |
I/O isolation resistance | Riso | Resistance between terminals (input and output) when a specified voltage is applied between the input and output terminals. | |
Total power dissipation | PT | Allowable power dissipation in the entire circuit between the input and output terminals. | |
I/O isolation voltage | Viso | Critical value before dielectric breakdown occurs, when a high voltage is applied for 1 minute between the same terminals where the I/O isolation resistance is measured. | |
Ambient temperature | Operating | Topr | Ambient temperature range in which the PhotoRelays can operate normally with a designated load current conditions. |
Storage | Tstg | Ambient temperature range in which the PhotoRelays can be stored without applying voltage. | |
Max. operating frequency | — | Max. operating frequency at which a PhotoRelays can operate normally when applying the specified pulse input to the input terminal |
Classification | Item | Condition | Purpose |
Life tests | High temperature storage test | Tstg (Max.) | Determines resistance to long term storage at high temperature. |
Low temperature storage test | Tstg (Min.) | Determines resistance to long term storage at low temperature. | |
High temperature and high humidity storage test | 85°C 185°F, 85%R.H. | Determines resistance to long term storage at high temperature and high humidity. | |
Continuous operation life test | VL = Max., IL = Max., IF = Recommended LED forward current | Determines resistance to electrical stress (voltage and current). | |
Thermal environment tests | Temperature cycling test | Low storage temperature (Tstg Min.) High storage temperature (TstgMax.) | Determines resistance to exposure to both low temperatures and high temperatures. |
Thermal shock test | Low temperature (0°C) (32°F), High temperature (100°C) (212°F) | Determines resistance to exposure to sudden changes in temperature. | |
Solder burning resistance | 260±5°C 500±41°F, 10 s | Determines resistance to thermal stress occurring while soldering. | |
Mechanical environment tests | Vibration test | 196 m/s2 {20 G}, 100 to 2,000 Hz*1 | Determines the resistance to vibration sustained during shipment or operation. |
Shock test | 9,800 m/s2 {1,000 G} 0.5 ms*2; 4,900 m/s2 {500 G} 1 ms | Determines the mechanical and structural resistance to shock. | |
Terminal strength test | Determined from terminal shape and cross section | Determines the resistance to external force on the terminals of the PhotoRelays mounted on the PC board while wiring or operating. | |
Solderability | 245°C 473°F 3 s (with soldering flux) | Evaluates the solderability of the terminals. |
光耦继电器是固态继电器的一种。英文是Solid State Optronics Relay。
一般继电器都是机械触点，靠通电流过线圈变成有磁性的磁铁吸合触点，从而控制开光状态。而光耦继电器工作原理类似于光耦，是由微电子电路，分立电子器件，电力电子功率器件组成的无触点开关。用隔离器件实现了控制端与负载端的隔离。固态继电器的输入端用微小的控制信号，达到直接驱动大电流负载。光耦继电器归于固态继电器，一般电磁继电器靠电流经过线圈使铁芯变成有磁性的磁铁吸合衔铁，从而使相关的触点动作操控负载的通断，而光耦继电器没有触点，其工作原理与光耦有点类似。光耦继电器为AC/DC并用的半导体继电器，指发光器件和受光器件一体化的器件。输入侧和输出侧电气性绝缘，但信号可以通过光信号传输。其内部的发光二极管是用来向光电元件放射光线的，光电元件接受光线并控制输出场效应管导通或截止。光耦继电器还有另一种可控硅整流管（SCR）输出，它的负载电流比场效应管更大，后者可达到数安培，而前者可达到几十安培。相对于电磁继电器，光耦继电器由于没有触点引起的磨损，使用寿命是无限的，同时也具有无震动、无切换声音等特性，与电磁继电器一样可控制各种负载（灯泡、发光二极管、加热器、马达等）。
光耦继电器有无机械触点，长寿命，低动作电流，高隔离电压，高速切换。低泄漏电流，交直流兼用。广泛用于测量仪器，通讯设备，办公自动化。在选用继电器时，最重要的指标是所选继电器的触点电流和电压，以及控制继电器导通开断的信号的电流和电压大小。在使用时，小功率的继电器一般直接焊接在电路板上，中大功率的继电器一般会安装在继电器座上，依据需要冉将继电器座安装在标准导轨上。由于继电器容易产生火花，因此在较大的功率的时候，建议考虑使用固态继电器、交流接触器等。通信用继电器将在今后继续增长，占到全球继电器市场的1/4。高频继电器是其发展的主要方向，在电信领域、无线通信、宽带输送接入等需求的推动下，已成为机电式继电器更新换代的新平台和下一代通信技术加速完善的助推器。体积更小，适用于表面装贴，高可靠，抗干扰性能优良的通信继电器需求旺盛；未来5G发展所需用的新型通信继电器将成为其发展主流。第四代通信继电器技术已日渐成熟，第三代移动通信的展开，为其提供良好的市场前景。光继电器/微电子继电器是电子产品向数字化、自动化、超小型化方向发展所必需的。
光继电器/微电子继电器由于其泄露率小、隔离性能好、输出特性稳定优良等优点，其应用领域在不断扩大。适用于“物联网”的光继电器由于其高灵敏性、高可靠性而成为优选产品，将会是下一代继电器发展的重要方向。
