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< Dual-In-Line Package Intelligent Power Module >
DIPIPM+ Series Application note
3.1.3 Interface circuit (example of opto-coupler isolated interface)
Prevention circuit
for inrush current
5V
Comparator
-
+
15V
OT trip
V
level
D
+
C1
Long GND wiring might
generate noise to input signal
and cause IGBT malfunction
(note)
(1) High speed (high CMR) opto-coupler is recommended.
(2) Set the current limiting resistance to make Fo sink current I
directly. To assure I
FO
(3) To prevent malfunction, it is strongly recommended to insert RC filter (e.g. R3=100Ω and C5=1000pF) and confirm the input
signal level to meet turn-on and turn-off threshold voltage.
(4) About comparator circuit at V
output chattering.
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
R3 C5
V
(14)
P
C5
R3
W
(15)
P
C5
V
(16)
P1
C2
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
CFo (23)
V
(24)
N1
D1
C2
V
(25)
NC
B
R1
Fig.3-1-3 Interface circuit example with opto-coupler
=5mA, it will be needed to pull up to 15V supply since Fo output may be max 4.75V (@I
output, it is recommended to design the input circuit with hysteresis because of preventing
OT
LVIC
HVIC
LVIC
Long wiring might cause SC level fluctuation
and malfunction
A
Control GND patterning
=5mA or less when the opto-coupler is driven by Fo output
FO
32
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)
Long wiring might cause short
circuit failure
NW (26)
C
D
Y
Shunt resistor
N1
Power GND patterning
=5mA, 25
FO
AC input
℃
).
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