The TLP291(GB-TPSE(T is a small outline transistor output optocoupler manufactured by Toshiba Semiconductor and Storage. This optocoupler consists of an infrared emitting diode optically coupled to a phototransistor. It provides electrical isolation between the input and output circuits, making it suitable for a variety of applications where signal transfer and electrical isolation are required.

Applications

• Programmable Logic Controllers (PLCs): Used for isolating input and output signals in industrial control systems.
• Inverter Circuits: Provides isolation between the control circuitry and the high-voltage power switching components.
• Microprocessor Input/Output Isolation: Protects microprocessors from voltage spikes and noise in industrial environments.
• Power Supplies: Used for feedback control isolation and safety isolation in power supplies.
• General Purpose Switching Circuits: Provides electrical isolation for switching circuits in various electronic applications.

Features

• Compact Package: Small outline package (SO4) allows for high-density board mounting.
• High Isolation Voltage: Provides high voltage isolation between input and output.
• Transistor Output: Simple transistor output interface makes it easy to use with various logic circuits.
• High Current Transfer Ratio (CTR): Offers efficient signal transfer with a high current transfer ratio.
• RoHS Compliant: Complies with environmental regulations for hazardous substances.

Benefits

• Electrical Isolation: Prevents ground loops and protects sensitive circuits from high voltage.
• Space Saving: Small package size allows for high-density circuit designs.
• Easy to Use: Simple transistor output interface simplifies circuit design and implementation.
• Reliable Performance: Provides stable and consistent performance in various operating conditions.
• Versatile Applications: Suitable for a wide range of applications requiring signal transfer and electrical isolation.

Additional Details

Technical Specifications:

• Isolation Voltage: 3750 Vrms (min)
• Current Transfer Ratio (CTR): 50% to 600%
• Collector-Emitter Voltage: 80V (max)
• Operating Temperature Range: -55°C to +110°C
• Package: SO4 (Small Outline 4-pin)

Functional Description: When current flows through the input diode, it emits infrared light, which activates the phototransistor on the output side. This causes current to flow between the collector and emitter of the transistor, thereby transferring the signal across the isolation barrier.