VLA503 Powerex, Inc., VLA503 Datasheet - Page 6

• Manufacturer Part Number: VLA503
• Description: Hybrid Ic Igbt Gate Driver
• Manufacturer: Powerex, Inc.


Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697-1800 [phone]
VLA503-01
Hybrid IC IGBT Gate Driver
Figure 2. VLA503-01 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
long enough so that the voltage on the detect Pin 1 is
greater than V
will erroneously indicate that a short circuit has occurred.
To avoid this condition the VLA503-01 has provisions for
extending the t
(C
adding C
is extended care must be exercised not to exceed the
short-circuit withstanding capability of the IGBT mod-
ule. 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
) between Pin 2 and V
V O
TRIP
SC
Figure 3. Adjustment of t trip
t trip
on trip time is shown in Figure 3. If t
TRIP
at the end of the t
10V
delay by connecting a capacitor
CC
t timer
(Pins 4). The effect of
TRIP
delay the driver
Rev. 04/07
10V
TRIP