
Sep.1998
6.6.5 Dead Time (t
dead
)
In order to prevent arm shoot
through a dead time between high
and low side input ON signals is
required to be included in the sys-
tem control logic. Two different val-
ues are specified on the datasheet:
A. t
dead
measured directly on
the IPM input terminals
B. t
dead
related to optocoupler
input signals using the
recommended application
circuit
The specified type B dead time is
related to standard high speed
optocouplers. (See Section 6.6.2)
By using specially selected
optocouplers with narrow distribu-
tion of switching times
the required type B dead time
could be reduced.
6.6.6 Using the Fault Signal
In order to keep the interface cir-
cuits simple the IPM uses
a single on/off output to alert the
system controller of all fault condi-
tions. The system controller can
easily determine whether the fault
signal was caused by an over tem-
perature or over current/short cir-
cuit by examining its duration.
Short circuit and over current con-
dition fault signals will be t
FO
(nominal 1.5ms) in duration. An
over temperature fault signal will be
much longer. The over temperature
Figure 6.45
PCB Layout for V-Series Connector
fault starts when the base plate
temperature exceeds the OT level
and does not reset until the base
plate cools below the OT
r
level.
Typically this takes tens of sec-
onds.
Note:
Unused fault outputs must be prop-
erly terminated by connecting them
to the +15V on the local control
power supply. Failure to properly
terminate unused fault outputs may
result in unexpected tripping of the
modules internal protection.
3 ± 0.05
3 ± 0.05
3 ± 0.05
3 ± 0.05
3 ± 0.05
43.57 ± 0.1
19 - 1.2
+0
19 - 0.9
+0
4 - 3.2
+0.1
14.1 ± 0.05
14.1 ± 0.05
2.54 ± 0.05
2.54 ± 0.05
14.1 ± 0.05
14.6 ± 0.1
Table 6.8 V-Series IPM Connection Methods
V-Series Intelligent Power Module Type
Connection Method
PM75RVA060, PM100CVA060, PM150CVA060,
PM200CVA060, PM300CVA060, PM50RVA120,
PM75CVA120, PM100CVA120, PM150CVA120
19 Position, 0.1" Compound
Inverse Header Receptacle,
Hirose Part # MDF92-19S-2.54DSA
PM400DVA060, PM600DVA060,
PM200DVA120, PM300DVA120
5 Position, 0.1" (2.54mm)
Inverse Header Receptacle,
Hirose Part # MDF7-5S-2.54DSA
MITSUBISHI SEMICONDUCTORS POWER MODULES MOS
USING INTELLIGENT POWER MODULES