vla504 Powerex, Inc., vla504 Datasheet - Page 6

• Manufacturer Part Number: vla504
• Description: Hybrid Ic Igbt Gate Driver
• Manufacturer: Powerex, Inc.


Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697-1800 [phone]
VLA504-01
Hybrid IC IGBT Gate Driver
Figure 2. VLA504-01 Desaturation Detector
SET FAULT SIGNAL
SLOW SHUTDOWN
DISABLE OUTPUT
ENABLE OUTPUT
CLEAR FAULT
V CE > V SC
V CE > V SC
WAIT t timer
SIGNAL
SIGNAL
START
SIGNAL
DELAY
INPUT
INPUT
OFF
t trip
ON
IS
IS
IS
IS
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
becomes long enough so that the voltage on the detect
Pin 1 is greater than V
the driver will erroneously indicate that a short circuit
has occurred. To avoid this condition the VLA504-01 has
provisions for extending the t
capacitor (C
effect of adding C
If t
the short-circuit withstanding capability of the IGBT
module. Normally this will be satisfied for Powerex NF and
A-Series IGBT modules as long as the total shut-down
time does not exceed 10µs.
FAULT SIGNAL
TRIP
(PIN 5)
(PIN 8)
-5V
V O
is extended care must be exercised not to exceed
TRIP
Figure 3. Adjustment of t trip
t trip
) between Pin 2 and V
TRIP
10V
SC
on trip time is shown in Figure 3.
at the end of the t
TRIP
t timer
delay by connecting a
CC
(Pins 4). The
TRIP
Rev. 04/07
10V
delay