Datasheet

TOP242-250
17
I
4/03
Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins (cont.)
Figure 22. Active-on (Fail Safe) Remote ON/OFF.
X
PI-2625-040501
DC
Input
Voltage
+
-
D
S
C
ON/OFF
47 kΩ
Q
R
can be an optocoupler
output or can be replaced by
a manual switch.
Q
R
CONTROL
X
ON/OFF
47 kΩ
PI-2626-040501
DC
Input
Voltage
+
-
D
S
C
R
IL
Q
R
12 kΩ
For R
IL
=
I
LIMIT
= 69%
25 kΩ
For R
IL
=
I
LIMIT
= 43%
Q
R
can be an optocoupler
output or can be replaced
by a manual switch.
CONTROL
PI-2627-040501
DC
Input
Voltage
+
-
D
S
C
CONTROL
L
47 kΩ
Q
R
R
MC
45 kΩ
Q
R
can be an
optocoupler output
or can be replaced
by a manual switch.
ON/OFF
X
R
IL
PI-2622-040501
DC
Input
Voltage
+
-
D
S
C
CONTROL
L
47 kΩ
2 MΩ
Q
R
R
LS
ON/OFF
For R
LS
= 2 MΩ
V
UV
= 100 VDC
V
OV
= 450 VDC
Q
R
can be an optocoupler
output or can be replaced
by a manual switch.
X
ON/OFF
47 kΩ
PI-2628-040501
DC
Input
Voltage
+
-
D
S
C
CONTROL
L
R
IL
R
LS
Q
R
2 MΩ
V
UV
= I
UV
x R
LS
V
OV
= I
OV
x R
LS
DC
MAX
@100 VDC = 78%
DC
MAX
@375 VDC = 38%
12 kΩ
For R
IL
=
I
LIMIT
= 69%
Q
R
can be an optocoupler
output or can be replaced
by a manual switch.
Figure 23. Active-off Remote ON/OFF. Maximum Duty Cycle will
be reduced.
Figure 24. Active-on Remote ON/OFF with Externally Set Current
Limit.
Figure 25. Active-off Remote ON/OFF with Externally Set Current
Limit.
Figure 26. Active-off Remote ON/OFF with LINE-SENSE.
Figure 27. Active-on Remote ON/OFF with LINE-SENSE and
EXTERNAL CURRENT LIMIT.
PI-2621-040501
DC
Input
Voltage
+
-
D
S
C
CONTROL
L
47 kΩ
Q
R
R
MC
45 kΩ
Q
R
can be an
optocoupler output or
can be replaced
by a manual switch.
ON/OFF