5-5
Fuji Electric Co., Ltd.
MT6M12343 Rev.1.0
Dec.-2016
Chapter 5
Recommended wiring and layout
VB(U)
VB(V)
VB(W)
IN(HU)
IN(HU)
IN(HW)
VCCH
COM
IN(LU)
IN(LV)
IN(LW)
VCCL
VFO
IS
COM
TEMP
NC
P
U
V
W
N(U)
N(V)
N(W)
C
C
C
C
C
C
R
C
SR
C
R
C
C
C
SGND
SGND
Power
Supply
Power
GND
TO
Motor
ZD
ZD
ZD
fr
om
s
y
s
te
m
c
on
tr
ol
,
a
nd
po
w
e
r
s
up
pl
y
f
or
dri
v
e
r
IC
i
n
IP
M
IPM
Power input
Power supply for high side drive
Interface
Over current protection
C
SGND
ZD
Jumper
lead
SBD
Fig.5-3 Image of recommended PCB layout
(Overall design around the IPM)
In this section, the recommended pattern layout and precautions in PCB design are described.
Fig.5-3 to Fig.5-7 show the images of recommended PCB layout (referring to example application circuit in
Fig.5-1 and Fig.5-2).
In these figures, the input signals from system control are represented with "IN(HU)".
The recommendations and precautions are as follows,
note) The input signals are represented with "IN(HU)".
(1) Overall design around the IPM
(A) Keep a relevant creepage distance at the boundary.
(Place a slit between there if needed.)
(B) The pattern of the power input (DC bus voltage) part and the power supply for high side drive
parts hould be separated in order to prevent the increase of conduction noise.
In case of crossing these wirings on pattern in multi-layer PCB, please take note of stray
capacitance between wires and insulation performance of the PCB.
(C) The pattern of the power supply for high side drive part and the input circuit of each phase part
should be separated to avoid malfunction of the system. In case of using multi-layer PCB, it is
strongly recommended not to cross these wirings.
Details of each part are described in next page.
2. Recommendations and Precautions in PCB design
C
C
SR
C
slit in PWB
snubber capacitor
shunt resistor
electrolytic capacitor
ceramic capacitor
zener diode
resister
Explanatory notes
PWB pattern
R
Boundary between
high potential difference
C
A
ZD
+
-
+
-
SBD
C
A Schottky barrier diode
