The TLP2955 is a small outline phototransistor coupler manufactured by Toshiba Semiconductor and Storage. It consists of a gallium arsenide infrared emitting diode optically coupled to a silicon phototransistor. The TLP2955 is designed for applications requiring electrical isolation between input and output, such as signal transmission and control systems.

Applications

• Programmable Logic Controllers (PLCs).
• I/O interfaces for microcontrollers.
• Isolated signal transmission.
• Power supply control circuits.
• Noise isolation in sensitive circuits.
• Use in measurement equipment.
• Use in general purpose switching.

Features

• Small Outline Package: Compact SO4 package for space-saving designs.
• High Isolation Voltage: Provides electrical isolation between input and output.
• Current Transfer Ratio (CTR): Specifies the efficiency of signal transfer from input to output.
• Low Input Current: Requires minimal input current to activate the output.
• High Output Voltage: Supports high output voltage levels.
• Fast Switching Speed: Enables rapid switching of signals.
• RoHS Compliant: Complies with RoHS environmental regulations.

Benefits

• Electrical Isolation: Provides safety and prevents ground loops between circuits.
• Compact Design: Small package allows for easy integration into space-constrained applications.
• Efficient Signal Transfer: High CTR ensures reliable signal transmission.
• Low Power Consumption: Requires minimal input current, reducing power consumption.
• Versatile Applications: Suitable for a wide range of isolation and control applications.

Additional Details

The TLP2955 offers an isolation voltage of up to 3750Vrms. The current transfer ratio (CTR) varies depending on the specific grade of the device, but it is typically between 50% and 600%. The collector-emitter voltage (VCEO) is typically around 80V. The forward current (IF) for the input diode is typically 50mA. The operating temperature range is -55°C to +110°C. This optocoupler is known for its reliable performance and small size, making it a popular choice for many isolation applications. Ensure to consult the datasheet for the most accurate and up-to-date specifications. The SO4 package allows for automated assembly, further simplifying manufacturing processes.