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DIPIPM+ Series Application note
3.3.2 Countermeasures and precautions
DIPIPM+ series are improved of noise withstand capabilities by means of reducing parts quantity, lowering
internal wiring parasitic inductance, and reducing leakage current. But when the noise affects on the control
terminals of DIPIPM (due to wiring pattern on PCB), the short circuit or malfunction of SC protection may occur.
In that case, below countermeasures are recommended.
Increase the capacitance of
C2 and locate it as close to
the terminal as possible.
Insert
the RC filter
Increase the capacitance of
C4 with keeping the same
time constant R1·C4, and
locate the C4 as close to
the terminal as possible.
Publication Date: September 2016
P1(1)
X
N1 (2)
N(B) (3)
Y
V
(4)
NC
R3
AIN (5)
C5
V
(6)
P1
C1 D1 C2
V
(7)
UFB
+
V
(8)
UFS
V
(9)
VFB
+
V
(10)
VFS
+
V
(11)
WFB
V
(12)
WFS
R3
U
(13)
P
C5
R3
V
(14)
P
C5
R3
W
(15)
P
C5
V
(16)
5V
P1
C2
R2
R3
U
(17)
N
C5
R3
V
(18)
N
C5
R3
W
(19)
N
C5
Fo (20)
5.1kΩ
V
(21)
OT
CIN (22)
C4
15V
CFo (23)
VD
V
(24)
+
C1
C2
N1
D1
V
(25)
NC
R1
Fig.3-3-2 Example of countermeasures for inverter part
LVIC
HVIC
LVIC
46
R (36)
S (35)
T (34)
B (33)
Brake
Resistor
X
P (32)
U (31)
V (30)
M
+
C3
W (29)
NU (28)
NV (27)
NW (26)
Y
Shunt resistor
AC input
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