SOP4 AC Optocoupler

Features

High isolation 3750 VRMS

CTR flexibility available see order

Information

AC input with transistor output

Operating temperature range - 55 °C to 110 °C

REACH compliance

Halogen free

MSL class 1

Application scenarios of SOP4 communication optocoupler
1. Communication line detector
SOP4 AC optocoupler can be applied to AC line detectors. In this application, optocouplers are used to couple AC signals into detectors, thereby achieving monitoring of AC lines. For example, the MPC354 series optocoupler is an optocoupler suitable for AC line detectors. It has two aluminum gallium arsenide infrared emitting diodes as AC inputs and is optically coupled to a silicon planar phototransistor detector 13 in a plastic SOP4 package.
2. On/off status detection of electronic devices
SOP4 AC optocouplers can also be used as on/off detectors to check the on/off status of circuits during the installation, debugging, and maintenance of electronic devices. This application utilizes the optical isolation characteristics of optocouplers, allowing the detector to monitor the state of the circuit without direct contact with the circuit.
3. Wearable devices and medical equipment
In wearable and medical devices, SOP4 AC optocouplers can be used to convert physiological signals of the human body (such as movement, metabolism, etc.) into electrical signals for subsequent data analysis and processing. This application utilizes the high efficiency and low noise characteristics of optocouplers, making signal acquisition and processing more accurate and reliable.
4. Automotive electronics and communication equipment
SOP4 communication optocouplers are also widely used in automotive electronics and communication equipment. In automobiles, it can be used for signal transmission and isolation of sensors and electromechanical devices, ensuring the performance and safety of the vehicle. In communication equipment, optocouplers are used in fiber optic communication to convert optical signals into electrical signals, achieving long-distance signal transmission

In terms of performance, it can replace Everlight EL354, LiteonLTV354T, Cimico CT354, Sharp PC354/356, Toshiba TLP120/180/182/126/187, Cosmo KPC354NT, Avago HCPL-354, Fairchild HMA2705, Renesas PS2705-1/2715-1/2765-1, Vishay SFH691AT; the package type is patch, which is divided into 3 gears according to the use of different products. The corresponding CTR value of each gear is different, which are 50-150, 80-400 B gear, and 20-300; mainly used in switching power supplies, smart meters, industrial controllers, AC/DC input modules, and officeequipment.

SOP4 AC Optocoupler

Package Dimensions (Dimensions in mm unless otherwise stated)

Recommended Solder Mask (Dimensions in mm unless otherwise stated) 

1.What is the difference between optocoupler and opto-isolator?

Distinguishing between the two terms is the magnitude of the isolation voltage. Optical couplers are used to transmit analog or digital information from one potential to another while maintaining voltage isolation below 5000V. Optical isolators are designed to transmit analog or digital data between systems while maintaining isolation of power systems with isolation voltages of 5000-50000v or above.

2.What are the advantages of optocoupler?

Optical coupler is a new type of device developed in the 1970s, it has been widely used in electrical insulation, level conversion, stage coupling, driving circuit, switching circuit, chopper, multivibrator, signal isolation, stage isolation, pulse amplifier circuit, digital instrumentation, long-distance signal transmission, pulse amplifier, relay (SSR) , instrumentation, communication equipment and microcomputer interface. In the single chip switching power supply, the linear coupler can be used to form the optocoupler feedback circuit.

3.354 Photocoupled storage method?

354 Photocoupler is an photocoupler that needs to be stored and processed correctly in order to guarantee its performance and life. Here are some recommended 354 photocoupled storage methods: Temperature and humidity: When storing 354 optical coupling, it should be placed in an environment with suitable temperature and moderate humidity. Avoid storing optical coupling in high temperature, high humidity or very low temperature to affect its performance and life. The recommended storage temperature range is from-20℃ to + 80℃ and the relative humidity ranges from 20% to 80%. Avoid direct sunlight: optical coupling is a photoelectric device, should avoid long time exposure to direct sunlight, so as not to affect its performance. It is recommended to store the optical coupling in an environment that avoids direct sunlight. Avoid magnetic field interference: optical coupling needs to transmit optical signals during the working process, so it should be avoided and stored in a strong magnetic field environment, so as not to affect its performance. It is recommended to store optical couplings in environments far away from magnetic matter and strong magnetic fields.

4.How to detect whether the performance of the 354 optical coupling is normal?

The test whether the performance of 354 optical coupling is normal can be performed by the following methods: Appearance inspection: First, observe the appearance of optical coupling, check whether there is damage, crack, deformation or leakage. If the appearance of the optical coupling is abnormal, it may affect its performance. Packaging inspection: check whether the packaging form of optical coupling meets the circuit design requirements, such as SMD, DIP and other packaging types. Ensure that the optical coupling package is compatible with the circuit design. Parameter check: check the parameters and specifications of the optical coupling, and check whether the working voltage, working current, transmission rate and other parameters meet the application requirements. If the optical coupling parameters do not meet the requirements.

5.How to prevent the 354 photocoupling from overheating in use?

To prevent the 354 photocoupling from overheating in use, we can start from the following aspects: Choose the appropriate optical coupling: select the 354 optical coupling with lower power consumption and higher thermal stability. Low-power light coupling produces less heat during work, which helps to reduce the risk of overheating. Optimized circuit design: In the circuit design stage, the thermal characteristics of photocoupling should be fully considered, and the circuit design should be optimized to ensure that the photocoupling can work at lower temperatures. Such as reasonable selection of working voltage, working current, transmission rate and other parameters, reduce the optical coupling work load. Improve the heat dissipation effect: ensure that there is enough heat dissipation space around the optical coupling to avoid heat aggregation. When necessary, the auxiliary heat dissipation measures such as a radiator or a fan can be used to improve the heat dissipation effect. Reduce the number of optical coupling: if the circuit design allows, minimize the number of optical coupling used to reduce the overall heat generation. By optimizing the circuit design, the working load of optical coupling is reasonably distributed to reduce the risk of overheating. Using temperature monitoring equipment: In key application scenarios, temperature monitoring equipment can be used to monitor the photocoupled working temperature in real time. When the temperature exceeds the safety threshold, take timely measures to reduce the temperature and prevent overheating. Avoid long full load operation: when the optical coupling is not at full load, it produces relatively less heat. Therefore, in practical applications, a long time of optical coupling full load operation should be avoided to reduce the risk of overheating. Regular maintenance and detection: Conduct regular maintenance and detection of optical coupling to detect and eliminate potential problems in time. For example, regularly check the appearance of the photocoupling, resistance, current transmission characteristics, voltage transmission characteristics, etc., to ensure that the photocoupling operates under normal working conditions. Through the above measures, the 354 photocoupling can be effectively prevented from overheating in use, and improve its performance and reliability.

6.Application of SOP4 AC Optocoupler in Line Detector

1. Efficient signal isolation
Signal isolation can be achieved through optical means, which can avoid electrical breakdown or other forms of electrical interference between different parts of the circuit. In line detectors, this isolation function is very important because it can ensure the safe operation of the detector and improve measurement accuracy.
2. Signal integrity and fidelity
Capable of transmitting AC signals without compromising signal integrity. This is crucial for line detectors as they require precise detection and analysis of the signals passing through. The characteristic of optocouplers makes them an ideal choice for line detectors.
3. Flexible configuration and adaptability
Provides different configurations and options that can be customized according to specific application requirements. For example, different optocouplers may have different characteristics such as isolation voltage, transmission rate, and sensitivity. This allows the designer of the line detector to choose the most suitable optocoupler 1 according to actual needs
4. Wide operating frequency range
SOP4 AC optocoupler can be used for transmitting AC signals of different frequencies. This makes them very suitable for use in line detectors, as signals in the line may have different frequency components. The wide operating frequency range of the optocoupler ensures that the line detector can accurately detect and analyze signal 1 in various situations.

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