The LTV-817S1-TP is a single-channel phototransistor optocoupler manufactured by Lite-On Inc. It is designed to provide electrical isolation between input and output circuits. This optocoupler is commonly used in a wide range of applications where isolation is required for safety or signal integrity purposes.

Applications

• Power supplies
• Motor control circuits
• Programmable logic controllers (PLCs)
• Industrial control equipment
• Measurement instruments
• Signal isolation

Features

• High isolation voltage
• Current transfer ratio (CTR)
• Compact surface mount package
• Low input current
• RoHS compliant

Benefits

• Electrical isolation for safety
• Signal isolation for noise reduction
• Compact design for space-constrained applications
• Low power consumption
• Environmentally friendly

Additional Details

The LTV-817S1-TP optocoupler consists of an infrared emitting diode (IRED) and a phototransistor. When current flows through the IRED, it emits infrared light, which activates the phototransistor. This allows a signal to be transmitted across the isolation barrier without any electrical connection. The isolation voltage is typically rated at 5000Vrms, providing a high degree of protection against voltage surges and transients. The current transfer ratio (CTR) is a key parameter that indicates the efficiency of the optocoupler. The LTV-817S1-TP features a CTR typically ranging from 50% to 600%, depending on the input current. The input current is typically around 5mA to activate the output transistor. The optocoupler is available in a small surface mount package, making it suitable for high-density circuit boards. Lite-On's manufacturing process ensures high reliability and long operating life. The device is also RoHS compliant, ensuring that it meets environmental regulations. The collector-emitter voltage is typically 35V and the collector current is around 50mA. The operating temperature range is generally between -30°C and +110°C. Detailed electrical characteristics, including CTR versus input current and temperature coefficients, can be found in the Lite-On datasheet. The LTV-817 series offers different CTR ranges, so selecting the appropriate variant based on the application's requirements is crucial. This optocoupler is widely used in various industrial and consumer electronic devices.