AN3063

Test results and significant waveforms

Doc ID 16261 Rev 3

17/33

Figure 21 shows the circuit behavior in case of a mains dip. As previously described, the

internal circuitry has detected the decreasing of the mains voltage and it has activated the

mains cycles it comes back to the nominal value. The situation is different if we check the

using the L6562A delivering similar output power. In case of a mains dip from 140 Vac to 90

Vac, the output voltage variation is not very different, but the output voltage requires a longer

time to restore the original value.

Testing with a wider voltage variation (e.g. 265 Vac to 90 Vac), the output voltage variation of

a PFC without the voltage feed-forward fast discharge is emphasized even more.

Figure 20.

L6562A input mains dip 140 Vac to

Figure 21.

EVL6563H-100W TM PFC: input

mains dip 140 Vac to 90 Vac

CH1: Vout

CH2: MULT (pin #3)

CH4: I_AC

CH1: Vout

CH2: MULT (pin #3)

CH4: I_AC