AN3065

Test results and significant waveforms

Doc ID 16279 Rev 2

19/33

In

Figure 24 a startup tentative below the threshold is captured. As visible at startup the

RUN pin does not allow PFC startup.

In

Figure 25 and 26 the waveforms of the circuit during operation of the brownout protection

are captured. In both cases the mains voltage was increased or decreased slowly. As visible

both at turn-on or turn-off there are no bouncing or starting attempts by the PFC converter.

Figure 24.

EVL6563S-100W TM PFC startup

attempt at 80Vac, 60 Hz, full load

CH1: PFC output voltage

CH2: Vcc voltage (pin #14)

CH3: RUN (pin #10)

CH4: gate drive (pin #13)

Figure 25.

EVL6563S-100W TM PFC: startup

with slow input voltage increasing,

full load

Figure 26.

EVL6533S-100W TM PFC: turn-off

with slow input voltage decreasing,

full load

CH1: PFC output voltage

CH2: Vcc (pin #14)

CH3: RUN (pin #10)

CH4: Gate drive (pin #13)

CH1: PFC output voltage

CH2: Vcc (pin #14)

CH3: RUN (pin #10)

CH4: Gate drive (pin #13)