2. Triac control circuits
Triacs can be controlled in much the same way as thyristors, except that they are often used in low-power converters where the cost of control circuits must be very low. Pulse transformers are rarely used to control triacs. The current trend is to integrate functions to enable quasi-direct control by logic circuits, or even microcontrollers, generally without galvanic isolation.
Under these conditions, trigger currents need to be low (sensitive...
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Triac control circuits
Bipolar Junction Transistors control circuits
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