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Questions and Answers
Which type of SCR can also be light-triggered?
Which type of SCR can also be light-triggered?
When is the Light Activated SCR (LASCR) most sensitive to light?
When is the Light Activated SCR (LASCR) most sensitive to light?
What happens when light falls on LASCR 1 or LASCR 2 in an OR circuit?
What happens when light falls on LASCR 1 or LASCR 2 in an OR circuit?
What triggers the Light Activated SCR (LASCR) in latching relays?
What triggers the Light Activated SCR (LASCR) in latching relays?
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What happens when the junction temperature of the Light Activated SCR (LASCR) increases?
What happens when the junction temperature of the Light Activated SCR (LASCR) increases?
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Study Notes
Light Activated SCR (LASCR)
- The Light Activated SCR (LASCR) can be light-triggered, allowing it to operate without a traditional gate signal.
- LASCR is most sensitive to light in the neighborhood of 600 nm to 650 nm wavelengths, where its response to illumination is peak.
LASCR Functionality in OR Circuits
- When light is directed towards LASCR 1 or LASCR 2 in an OR circuit, either SCR can be triggered to turn on, enabling current flow through the load if enough light exposure occurs.
- The OR circuit configuration ensures that the actuation of one LASCR is sufficient to control the output, enhancing reliability and redundancy.
Triggering Mechanism in Latching Relays
- In latching relays, the LASCR is triggered by an applied light signal, which causes it to switch states and maintain the current flow even after the light source is removed.
- This light-triggering mechanism is crucial for remote control applications where electrical connections can be difficult.
Impact of Junction Temperature Increase
- When the junction temperature of the LASCR rises, it may lead to a decrease in the device's breakdown voltage, potentially making it more susceptible to unwanted triggering.
- Increased junction temperature affects overall performance and stability, necessitating careful thermal management in practical applications.
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Description
Test your knowledge about Light Activated SCR (LASCR) in this quiz. Learn how it operates, its unique characteristics, and its sensitivity to light.
