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DER-507 and triac triggering

Posted by: Michele Mocellin on

Hi,

I'm using DER-507 design to power an MCU (ATtiny 402), and I'm using this MCU to trigger a logic level triac (BTA137 600E).

When I set the MCU's pin connected to the gate in HIGH state the triac go into conduction state, but when I set it on LOW state the triac go into a "semi conduction state". I also tried to connect the gate directly on power supply VSS but the result didn't change.

What I'm doing wrong ?

 

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Submitted by PI-Hiro on 12/10/2021

Hello Michele Mocellin,

Can you send the schematic and PIexpert computation so that we can understand the issue?

Thank you.

Regards,

PI-Hiro