< Dual-In-Line Package Intelligent Power Module >
Series Application note
Publication Date: September 2016
46
3.3.2 Countermeasures and precautions
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.
Fig.3-3-2 Example of countermeasures for inverter part
Increase the capacitance of
C2 and locate it as close to
the terminal as possible.
M
MC
U
C2
15V
VD
C4
R1
Shunt resistor
5V
+
C1
D1
C3
+
R2
5.1k
Ω
C2
+
C1 D1 C2
C5
R3
C5
R3
Brake
Resistor
P
(32)
U
(31)
V
(30)
W
(29)
NW
(26)
LVIC
NV
(27)
NU
(28)
HVIC
S
(35)
T
(34)
B
(33)
LVIC
C5
R3
C5
R3
C5
R3
C5
R3
C5
R3
+
+
U
N
(17)
V
N
(18)
W
N
(19)
Fo
(20)
V
VFB
(9)
V
P
(14)
V
WFB
(11)
W
P
(15)
U
P
(13)
V
NC
(25)
V
P1
(16)
V
UFB
(7)
V
OT
(21)
P1(1)
N1 (2)
N(B) (3)
AIN
(5)
V
NC
(4)
V
P1
(6)
V
UFS
(8)
V
VFS
(10)
V
WFS
(12)
R
(36)
V
N1
(24)
CIN
(22)
CFo
(23)
X
Y
X
Y
AC input
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.