vla539-01r ISAHAYA ELECTRONICS CORPORRATION, vla539-01r Datasheet - Page 4

• Manufacturer Part Number: vla539-01r
• Description: Driver For Igbt Modules
• Manufacturer: ISAHAYA ELECTRONICS CORPORRATION

OPERATION OF PROTECTION CIRCUIT
(1) In case the gate voltage is “H” and the collector voltage is high,
(2) The protection circuit reset and resorted to ordinary condition if input
(3) When the output rises, the controlled time detect short circuit
OPERATION FLOW ON DETECTING SHORT CIRCUIT
Note : Output voltage with protection circuit operating is about -lVEEl + 2V.
this Hybrid IC will recognize the circuit as short circuit and immediately
inform that protection circuit is operating at the same time from pin 28 .
(Typ 2.8us) is set up so that on-time of IGBT can be secured properly.
It is possible to adjust that time by connecting the capacitor (Ctrip)
reduce the gate voltage . Besides, put out a fault sign (“L”) which
between pin 21,22 and 29.
sign is “L” when the predetermined time(1 ~ 2ms) passed.
(“L” period needs 15us or more )
GATE SHUTDOWN
INPUT SIGNAL IS
ENABLE OUTPUT
OUTPUT ALARM
END OF TIMER
SHORT CIRCUIT
DETECTION OF
CLEAR ALARM
PRELIMINARY
TIMER START
YES
YES
START
“OFF”
NO
NO
1 ~ 2ms
SIGNAL
ADJUSTMENT OF OUTPUT FALL TIME
(When the protection circuit is operating)
In case you want to decrease the speed of reverse bias when the
protection circuit is operating, you can adjust that speed by connecting
the capacitor (Cs) between pin 21 and 27.
(Please refer to under figures. )
INPUT
Vo
4 5
4 0
3 5
3 0
2 5
2 0
1 5
1 0
5
0
0
90%
50%
V
Ta=2 5deg
10 0
t1,t2 VS. Cs CHARACTERISTICS
CONNECTIVE CAPACITANCE Cs(pF)
D
= 15 V
t1
200
t2
10%
30 0
(TYPICAL)
(PIN:27 -2 1)
t2
DRIVER FOR IGBT MODULES
t1
VLA539-01R
40 0
500
60 0
700
HYBRID IC
80 0
0%