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VLA552-01R Schematic ( PDF Datasheet ) - Isahaya Electronics

Teilenummer VLA552-01R
Beschreibung DRIVER FOR IGBT MODULES
Hersteller Isahaya Electronics
Logo Isahaya Electronics Logo 




Gesamt 9 Seiten
VLA552-01R Datasheet, Funktion
DESCRIPTION
VLA552-01R is a hybrid integrated circuit designed for driving
n-channel IGBT modules in any gate-amplifier application.
OUTLINE DRAWING
Electrical isolation voltage between input and output is 4000Vrms
(for 1minute).This device include the isolated type DC-DC
88.0 MAX
converter for a Gate drive. Therefore design of the gate
power supply is not required.
The system of built-in short circuit protection provide a margin
to time by function to maintain reverse bias for a predetermined
time after the detection of short circuit.
Recommended IGBT modules:
VCES = 1200V series up to 3600A class
VCES = 1700V series up to 3600A class
FEATURES
•Built-in the isolated type DC-DC converter for gate drive
•SIP outline allows more space on mother board
2.54
8.0 MAX
1
0.75 +/-0.1
•Built-in short circuit protection (With a pin for fault output)
•Possible to assist collector clamp circuit
•Variable fall time on activity of short circuit protection
•Electrical isolation voltage between input and output is 4000Vrms (for 1minute)
•CMOS compatible input.
APPLICATIONS
To drive IGBT modules for general industrial use apparatus.
BLOCK DIAGRAM
HYBRID IC
VLA552-01R
DRIVER FOR IGBT MODULES
Dimensions : mm
8.0MAX
6.0MAX
30
0.7MAX
11.5MAX
17.0MAX
1
VD 2
Gi 3
4
120
VI+ 6
1k
VI- 7
120
REGULATOR
LATCH
DETECT
CIRCUIT
IINNTTEERRFFAACCEE
TIMER
&RESET
CIRCUIT
GATE SHUT-
DOWN CIRCUIT
5,17,18 pin : N.C.
19 Vcc
29
ttrip
CONTROL
30
DETECT
PIN
20 GND
26
COLLECTOR CLAMP
ASSIST
25 Vcc
23 Vo
24
27
SHUT-DOWN
SPEED CONTROL
28
FAULT
OUTPUT
21 VEE
22






VLA552-01R Datasheet, Funktion
HYBRID IC
VLA552-01R
OPERATION OF PROTECTION CIRCUIT
(1) In case the gate voltage is “H” and the collector voltage is high,
this Hybrid IC will recognize the circuit as short circuit and immediately
reduce the gate voltage . Besides, put out a fault sign (“L”) which
inform that protection circuit is operating at the same time from pin 28 .
(2) The protection circuit reset and return to ordinary condition if input
signal is “L” when the predetermined time(1 ~ 2ms) passed.
(“L” period needs 15us or more )
(3) When the output rises, the controlled time detect short circuit
(Typ 3.5us) 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)
between pin 21,22 and 29.
OPERATION FLOW ON DETECTING SHORT CIRCUIT
DRIVER FOR IGBT MODULES
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
SIGNAL
t1
90%
50%
t2
Vo 10%
0%
START
DETECTION OF
SHORT CIRCUIT
GATE SHUTDOWN
TIMER START
OUTPUT ALARM
END OF TIMER
YES
INPUT SIGNAL IS
“OFF”
1 ~ 2ms
NO
NO
t1,t2 VS. Cs CHARACTERISTICS
(TYPICAL)
45
40
VDV=D1=51V5 V
Ta=25degC
Ta=25deg
35
30
25
t2
20
15
10
t1
5
0
0 100 200 300 400 500 600 700 800
CONNECTIVE CAPACITANCE Cs(pF)
(PIN:27-21)
YES
CLEAR ALARM
ENABLE OUTPUT
Note : Output voltage with protection circuit operating is about -lVEEl + 2V.
6

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