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Circuit Operation With Forward Phase TRIAC Dimmer

7 Circuit Operation With Forward Phase TRIAC Dimmer

The dimming operation of the circuit was verified using a forward phase TRIAC dimmer. Waveforms

captured at different dimmer settings are shown below:

Figure 14. Forward phase circuit at full brightness Figure 15. Forward phase circuit at 90° firing angle

Figure 16. Forward phase circuit at 135° firing angle

SNOA555C–April 2011–Revised May 2013 AN-2091 LM3448 - 230VAC, 6W Isolated Flyback LED Driver

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