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Triac control by pulse transformer

FVan .1
Associate III

See AN436. I am using T1635-6G in a Hybrid Relay configuration following AN4993. Load is about 2kW at 230 VAC.

Circuit works fine at with gate traiin of pulses (2kHz, DC = 50%).

I want to trim parameters to optimum, at the moment transformer is make some audible sound at 2kHz.

What will be the best setting for PM frequenccy and duty cycle.

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