Техническая Спецификация для STMicroelectronics L6563H 100 W TM PFC demonstration board EVL6563H-100W EVL6563H-100W
Модели
EVL6563H-100W
AN3063
Test results and significant waveforms
Doc ID 16261 Rev 3
17/33
internal circuitry has detected the decreasing of the mains voltage and it has activated the
C
C
FF
internal fast discharge. As visible, in that case the output voltage changes but in few
mains cycles it comes back to the nominal value. The situation is different if we check the
performance of a controller without the V
performance of a controller without the V
FF
function.
shows the behavior of a PFC
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.
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.
a PFC without the voltage feed-forward fast discharge is emphasized even more.
Figure 20.
L6562A input mains dip 140 Vac to
90 Vac, no V
90 Vac, no V
FF
input
Figure 21.
EVL6563H-100W TM PFC: input
mains dip 140 Vac to 90 Vac
mains dip 140 Vac to 90 Vac
CH1: Vout
CH2: MULT (pin #3)
CH4: I_AC
CH1: Vout
CH2: MULT (pin #3)
CH3: V
FF
(pin #5)
CH4: I_AC