Datasheet

Functional check AN3329
28/47 Doc ID 18376 Rev 1
Mains sags/dips
Figure 56 and 57 show the converter behavior in the case of half-cycle (8.3 ms) or a
complete cycle (16.6 ms) mains dip. As can be noted, in both cases the PFC output voltage
drops but the L6599A still works correctly, and output voltages do not show any disturbance,
therefore demonstrating a good immunity of the circuit against mains dips.
Figure 56. Half cycle mains dip at full load and
115 Vac - 60 Hz
Figure 57. Full cycle mains dip at full load and
115 Vac - 60 Hz
CH3: 24 V output
CH1: HB voltage
CH2: PFC drain
CH4: PFC gate
CH3: 24 V output
CH1: HB voltage
CH2: PFC drain
CH4: PFC gate