Fuji Electric Co., Ltd.
3-16
MT6M12343 Rev.1.0
Dec.-2016
Chapter 3
Detail of Signal Input/Output Terminals
t
IN(ON)
is a recommended minimum turn-on pulse width for changing the IGBT state from OFF to ON, and
t
IN(OFF)
is a recommended minimum turn-off pulse width for changing the IGBT state from ON to OFF.
Fig.3-17 and Fig.3-18 show IGBT drive state for various control signal pulse width.
3. IGBT drive state versus Control signal pulse width
0
Minimum
t
IN(ON)
Outside recommended
range
Recommended range
A
B
0
Recommended range
C
D
Minimum
t
IN(OFF)
Fig.3-18 IGBT drive state versus OFF pulse width of Control signal
Fig.3-17 IGBT drive state versus ON pulse width of Control signal
state A : IGBT may turn on occasionally, even when the ON pulse width of control signal is less than
minimum
t
IN(ON)
.
Also if the ON pulse width of control signal is less than minimum
t
IN(ON)
and
voltage below -5V is applied between U-COM,V-COM,W-COM , it may not turn off due to
malfunction of the control circuit.
state B : IGBT can turn on and is saturated under normal condition.
state C : IGBT may turn off occasionally, even when the OFF pulse width of control signal is less than
minimum
t
IN(OFF)
.
Also if the OFF pulse width of control signal is less than minimum
t
IN(OFF)
and
voltage below -5V is applied between U-COM, V-COM, W-COM , it may not turn on due to
malfunction of the control circuit.
state D : IGBT can turn fully off under normal condition.
Out recommended
range
