LT3681
APPLICATIONS INFORMATION
CLOSING SWITCH
DANGER
SIMULATES HOT PLUG
V
IN
I
IN
20V/DIV
V
IN
RINGING V MAY EXCEED
LT3681
4.7 F
IN
ABSOLUTE MAXIMUM RATING
+
I
IN
LOW
STRAY
10A/DIV
IMPEDANCE
ENERGIZED
24V SUPPLY
INDUCTANCE
DUE TO 6 FEET
(2 METERS) OF
TWISTED PAIR
20 s/DIV
(10a)
0.7
V
IN
20V/DIV
LT3681
4.7 F
+
0.1 F
I
IN
10A/DIV
20 s/DIV
(10b)
V
IN
20V/DIV
LT3681
4.7 F
+
+
22 F
35V
AI.EI.
I
IN
10A/DIV
3681 F10
20 s/DIV
(10c)
Figure 10. A Well Chosen Input Network Prevents Input Voltage Overshoot and
Ensures Reliable Operation when the LT3681 is Connected to a Live Supply
3681f
19