TLP109 Applications:

Isolation of High and Low Voltage Circuits: Optocouplers are often used to provide electrical isolation between high-voltage and low-voltage circuits, preventing potential damage to sensitive components.

Switching Power Supplies: Optocouplers can be used in feedback loops of switching power supplies to transfer information across the isolation barrier.

Microcontroller Interface: Optocouplers can be employed to isolate a microcontroller from high-voltage or noisy environments.

Signal Isolation: Any application where it is necessary to transfer signals across an isolation barrier, such as in industrial control systems.

Data Communication: In some cases, optocouplers can be used in serial communication interfaces to provide isolation.

Medical Devices: In medical applications where electrical isolation is crucial for patient safety.

Instrumentation and Measurement Systems: Optocouplers can be used in measurement and instrumentation systems to isolate sensitive measurement equipment.