<Dual-In-Line Package Intelligent Power Module>
1200V Mini DIPIPM with BSD Series APPLICATION NOTE
Publication Date: September 2015
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3.3 Noise and ESD Withstand Capability
3.3.1 Evaluation Circuit of Noise Withstand Capability
1200V Mini DIPIPM series have been confirmed to be with over +/-2.0kV noise withstand capability by the
noise evaluation under the conditions shown in Fig.3-3-1. However, noise withstand capability greatly depends
on the test environment, the wiring patterns of control substrate, parts layout, and other factors; therefore an
additional confirmation on prototype is necessary.
Fig.3-3-1 Noise withstand capability evaluation circuit
Note:
C1: AC line common-mode filter 4700pF, PWM signals are input from microcomputer by using opto-couplers, 15V
single power supply, Test is performed with IM
Test conditions
V
CC
=600V, V
D
=15V, Ta=25°C, no load
Scheme of applying noise: From AC line (R, S, T), Period T=16ms, Pulse width tw=0.05-1
μ
s, input in random.
3.3.2 Countermeasures and Precautions
DIPIPM improves 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
M
MCU
C2
V
D
C4
R1
N1
+
U
N
V
N
W
N
Fo
V
N1
V
NC
P
U
W
NU
LVIC
V
CIN
NV
NW
CFo
C3
+
V
P1
C2
U
P
V
UFB
V
UFS
HVIC
V
P1
C2
V
P
V
VFB
V
VFS
HVIC
V
P1
C2
W
P
V
WFB
V
WFS
HVIC
+
+
+
Insert the RC filter
Increase the capacitance of
C2 and locate it as close to
the terminal as possible.
Increase the capacitance of
C4 with keeping the same
time constant R1·C4, and
locate the C4 as close to the
terminal as possible.
Breaker
DIPIPM
Noise simulator
I/F
Inverter
M
Fo
T
S
C
W
V
U
R
Isolation
transformer
Voltage
slider
AC100V
AC input
Heat sink
Control supply
(15V single power source)
DC supply
