MT6M15962a
© Fuji Electric Co., Ltd. All rights reserved.
2.6 Warning circuit (specific models only)
Since the X-IPM has a built-
in 1.3kΩ warning output resistor, the optocoupler can be directly
connected without an external resistor. When connecting the optocoupler, make not only the wiring
between the optocoupler and the IPM as short as possible, but also the pattern layout that reduces the
stray capacitance between the primary and secondary sides of the optocoupler.
Since a dv/dt may cause the secondary side potential of the optocoupler to fluctuate, it is
recommended to connect a capacitor of about 10nF to the output terminal on the secondary side of the
optocoupler in order to stabilize the potential.
Also, when the temperature warning function is operating, the consumption current by
V
CC
/
R
WNG
increases, so please consider the design of the power supply. If the temperature warning function is
not used, it is recommended to keep the WNG terminal open. If the warning terminal is pulled up to
V
CC
,
the consumption current increases when the temperature warning function operates. Thus, design the
power supply properly. In addition, do not pull down the warning terminal to GND.
4-7
2.7 Pull-up of signal input terminal
Connect the control signal input terminals to
V
CC
through a 20kΩ pull-up resistor.
Furthermore, unused input terminals also have to be pulled up to
V
CC
through the
20kΩ resistor. If
these terminals are not pulled up to
V
CC
, UV protection is activated and IPM cannot be operate.
2.8 Connection when there is an unused phase
If there are cases when a 6in1 (without brake part) is used in only single phase or a 7in1(with brake
part) is used without brake part, supply control voltage to these unused phase and connect the
input/alarm terminals to
V
CC
to stabilize the potential of these terminals. The warning signal output
terminal is excluded.
（
refer to 4.2.6)
2.9 Handling of unconnected terminals (no contact terminals)
Unconnected terminals (no contact terminals) are not connected inside of the IPM. These terminals
are insulated from other terminals. There is no need of special treatment such as potential stabilization.
Also, guide pins are not connected inside of the IPM.
2.5 Alarm circuit
The X-IPM has a built-
in 1.3kΩ alarm output resistor, so that an optocoupler can be connected to the
terminal directly without an external resistor. The wiring distance between the optocoupler and the IPM
should be as short as possible. Also, the pattern layout should be designed to minimize the floating
capacitance between the primary side and the secondary side of the optocoupler.
Since a dv/dt may cause the secondary side potential of the optocoupler to fluctuate, it is
recommended to connect a capacitor of about 10nF to the output terminal on the secondary side of the
optocoupler to stabilize the potential as shown in Figure 4-4.
Furthermore, regarding IPMs with an upper arm alarm output function, connect the alarm output
terminal to
V
CC
as shown in Figure 4-4 (b) in order to stabilize the potential if the upper arm alarm
output function is not used.
