vla500-02 ISAHAYA ELECTRONICS CORPORRATION, vla500-02 Datasheet - Page 4

• Manufacturer Part Number: vla500-02
• 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 : “L” output voltage with protection circuit operating is about VEE + 2V.
this Hybrid IC will recognize the circuit as short circuit and immediately
(Typ 2.8us) is set up so that on-time of IGBT can be secured properly.
inform that protection circuit is operating at the same time from pin 28 .
reduce the gate voltage . Besides, put out a fault sign (“L”) which
It is possible to adjust that time by connecting the capacitor (Ctrip)
between pin 21,22 and 29.
sign is “L” when the predetermined time(1 ~ 2ms) passed.
(“L” period needs 15us or more )
OUTPUT FAULT SIGN
CIRCUIT OPERATE
GATE SHUTDOWN
INPUT SIGN IS “L”
END OF TIMER
SHORT CIRCUIT
DETECTION OF
TIMER START
YES
YES
RESET
START
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 21,22 and 27.
(Please refer to under figures. )
INPUT
Vo
50
45
40
35
30
25
20
15
10
90%
5
0
50%
0
V
Ta=25deg.
t1
100 200 300 400 500 600 700 800
D
CONNECTIVE CAPACITANCE Cs (pF)
=15V
t1,t2 VS. Cs CHARACTERISTICS
10%
t2
t2
DRIVER FOR IGBT MODULES
(PIN:27-21)
(TYPICAL)
t1
VLA500-02
HYBRID IC
0%