Vicor ComPAC Family 50 to 600 Watt DC-DC Switchers - Manual (Page 2)

Application Notes
2
The Master Disable input is optically isolated and incorporates a reverse polarity
protection diode. Apply a current of up to 20 mA to disable output(s). See ComPAC
data sheet for minimum levels.
Master Disable Drive Circuit
Input Connections
Input Operating Voltage
Disable +
Disable –
V
IN
+
V
IN
–
GND
Master Disable
DC Input
Earth Ground
Long Term Safe Operating Curves. I.S.W. = Input Surge Withstand (no
disruption of performance, 1% duty cycle max.).
R.E. = Ratings Exceeded. S.D. = Shutdown. For short duration transient
capability, refer to product specifications.
20 mA Max.
Disable
DIS+
DIS–
+
V
0.1 1 10ms 100 1000
100V
Normal Operating Area
I.S.W.
Full Load
100V
Standard Wide Range 24V Inputs
0.1 1 10ms 100 1000
800V
Normal Operating Area
I.S.W.
Full Load
300V Input
S.D.
160V
0.1 1 10ms 100 1000
Normal Operating Area
I.S.W.
Full Load
48V Input
R.E.
276V
Normal Operating Area
I.S.W.
Full Load
0.1 1 10ms 100 1000
48V Wide Range Input
R.E.
S.D.
R.E. R.E.
32V
21V
36V
18V
S.D.
76V
125V
60V
100V
42V
500V
400V
200V 36V
S.D.
S.D. 100V
500ms 500ms
See fuse chart on page 6