DPA422-426
Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins (cont.)
+
+
ILIMIT = 100% @ 36 VDC
For RIL = 12 k
ILIMIT = 64%
ILIMIT
=
64% @ 72 VDC
RLS
363 k
For RIL = 25 k
ILIMIT = 34%
See Figure 32 for other
resistor values (RIL)
DC
Input
Voltage
DC
Input
Voltage
D
S
D
S
CONTROL
X
CONTROL
C
C
X
RIL
RIL
4.2 k
-
-
PI-2854-050602
PI-2836-050602
Figure 15. Externally Set Current Limit.
Figure 16. Current Limit Reduction with Line Voltage.
QR can be an
+
+
QR can be an optocoupler
output or can be replaced by
a manual switch.
optocoupler output or
can be replaced
by a manual switch.
QR
ON/OFF
RMC
47 k
DC
Input
Voltage
DC
Input
Voltage
D
37.4 k
CONTROL
C
D
L
CONTROL
S
C
X
ON/OFF
QR
47 K
S
-
-
PI-2625-040501
PI-2855-050602
Figure 18. Active-off Remote ON/OFF. Maximum Duty Cycle Will Be Reduced.
Figure 17. Active-on (Fail Safe) Remote ON/OFF.
QR can be an
+
QR
optocoupler output
or can be replaced
by a manual switch.
ON/OFF
RMC
47 k
37.4 k
For RIL = 12 k
ILIMIT = 64%
DC
Input
Voltage
DC
Input
Voltage
D
D
L
For RIL = 25 k
ILIMIT = 34%
CONTROL
CONTROL
C
C
S
X
S
X
RIL
ON/OFF
-
PI-2857-050602
Figure 20. Active-off Remote ON/OFF with Externally Set Current Limit.
Figure 19. Active-on Remote ON/OFF with Externally Set Current Limit.
12
Rev. T 12/12
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