This SCR phase control works much like the common TRIAC ... but is polarity sensitive so it does not lend itself to TRIAC control. However, if two such PUT trigger circuits are employed for ...

The control circuit in Figure 1a allows you to manually adjust the power delivered to a load. By changing the setting of potentiometer R 3, you change the phase angle at which ... handle ac power if ...

The FL7730 circuit is an active PFC controller for single-stage flyback topology application. The device supports both triac and analog dimming. The device can achieve triac dimming control ...