The TLP647G is a high-speed photocoupler from Toshiba, designed for isolating circuits while providing reliable signal transfer. It features a gallium arsenide infrared emitting diode (IRED) as the input stage and a phototransistor as the output stage. This configuration enables the device to electrically isolate the input and output sides, protecting sensitive control circuits from voltage spikes and noise. The TLP647G comes in a small outline package, making it suitable for high-density mounting applications.

Applications

• Programmable Logic Controllers (PLCs): Used for isolating input/output modules.
• Inverter Circuits: Protecting control circuitry from high voltage.
• Switching Power Supplies: Providing feedback isolation.
• Factory Automation Equipment: Isolating control signals in industrial environments.
• Motor Control Circuits: Ensuring safe operation and preventing damage from motor back EMF.

Features

• High Isolation Voltage: Offers significant electrical isolation between input and output.
• High Current Transfer Ratio (CTR): Provides efficient signal transfer with minimal current loss.
• Fast Switching Speed: Ensures quick response times in high-speed applications.
• Small Outline Package (SOP): Allows for compact board designs.
• Pb-Free Construction: Compliant with environmental regulations, reducing hazardous substances.

Benefits

• Enhanced Safety: Protects sensitive electronic components from high voltage and transient surges.
• Improved Signal Integrity: Reduces noise and interference in signal transmission.
• Compact Design: Facilitates the development of smaller and more efficient electronic devices.
• Increased Reliability: Offers robust performance in demanding industrial environments.
• Compliance: Meets industry standards for safety and environmental protection.

Technical Specifications: The TLP647G typically features an isolation voltage of 3750 Vrms, a current transfer ratio (CTR) ranging from 50% to 300% (depending on the specific grade), and a typical forward current of 20mA. Its operating temperature ranges from -55°C to 110°C. The device is commonly available in a 4-pin SO4 package. Detailed specifications can be found in the Toshiba datasheet.