TLP137(F)

Optoisolators - Transistor, Photovoltaic Output

The TLP137(F) optoisolator is a component that provides electronic isolation in circuit designs. It transfers signals between two parts of an electrical system or circuit that are separated electrically, while still providing both optical and electrical isolation of these parts. This optoisolator also offers high common mode rejection (CMRR) and high transient voltage protection (TVP).

Application Field

The isolation offered by the TLP137(F) optoisolator allows systems to safely interface with each other, both transmitting and receiving data between different voltages. It can be used in a variety of applications. One example is medical monitoring, where the optoisolator provides a secure optically separated path between the two systems, protecting both from static electricity and electromagnetic interference. It is also commonly used in automation systems, such as factory automation, where an optoisolator is used to send data from the controller to the machine and vice versa. Other examples include measurement and control systems, server-client communications, data communications, and power supplies.

Working Principle

The TLP137(F) optoisolator works by using an LED and a phototransistor combination in a single package. The LED is triggered by the input signals and emits light that is sensed by the phototransistor, generating a current proportional to the intensity of the light. The light is kept from reaching the rest of the system, so the optoisolator can provide electrical isolation between the two systems. When the LED is off, the phototransistor will not be triggered and the output will remain off. The CMRR and TVP of the optoisolator is due to the direct coupling of the LED and the phototransistor, which provides a direct path that is highly resistant to noise.

Conclusion

The TLP137(F) optoisolator provides a secure and reliable solution for providing electrical isolation between two systems. Its common mode rejection and transient voltage protection make it ideal for applications such as medical monitoring, automation systems, measurement and control systems, server-client communications, data communications, and power supplies. Its operating principle allows for a wide range of applications, providing a safe and secure way to transfer signals between systems without risk of electrical interference.