User guide
22 of 35
Revision 1.4
2021-09-10
EVAL-M1-IM818-A user guide
Evaluation power board with MADK M1 connector
System and functional description
2.6.5
EMI filter and soft power up circuit
Figure21 depicts the schematic from the AC line input connector J1 to the rectified DC bus voltage. This
circuitry includes a passive EMI filter consisting of elements C1, C2, L1, L2 and a 40 A/1200 V rectifier block
DB, a fuse F1 for inrush current protection, and a relay K1 for soft powering up and reducing conduction
losses in steady state. Four electrolytic capacitors C6, C7, C8 and C9 are used for buffering the rectified DC
bus voltage DCP.
Figure 21
Current feedback configuration in MCEWizard for EVAL-M1-101T and EVAL-M1-IM818-A
U
2
V
3
W
4
P
5
N
1
DB
GUO40-12NO1
R2
10W100ohm
K1
T9GV1L14-12
R3
2
7
0
k
1
W
R4
2
7
0
k
1
W
C6
C
D
4
5
0
V
4
7
0
u
C8
C
D
4
5
0
V
4
7
0
u
L2
220uH 7.1A
C4
1
0
4
1
0
0
0
V
1
2
3
4
5
J1
CON7
R1
27 0.5W
15V
C5
104 1000V
C3
104 1000V
*
*
L1
2mH 10A
F1
ZTPV-25 30A1000V
C1
2200pF 4kV
C2
2200pF 4kV
C7
C
D
4
5
0
V
4
7
0
u
C9
C
D
4
5
0
V
4
7
0
u
DCBUS
TPS
GND1
TPS
