User guide
38 of 45
V 1.0.1
2021-01-27
REF-AIRCON-C302A-IM564 user guide
Air conditioner application reference design kits
System performance
4.4
PFC overcurrent protection test
The IMC302A’s MCE firmware has two options for PFC overcurrent protection: cycle-by-cycle and latch-up OCP.
Figure 33 shows the OCP behavior of cycle-by-cycle current protection. When input current I
ac
reaches 18 A
PEAK
(13.6 A
RMS
), it becomes flat-topped, which means input peak current is limited by cycle-by-cycle function.
Figure 33
PFC Cycle-by cycle OCP test
CH1: V
ac
CH2: V
dc
CH3: I
ac
CH4: I
PFCTRIP
