TOP242-249
Typical Uses of LINE-SENSE (L) and EXTERNALCURRENT LIMIT (X) Pins (cont.)
VUV = IUV x RLS
VOV = IOV x RLS
+
+
QR can be an optocoupler
output or can be replaced by
a manual switch.
For RLS = 2 MΩ
2 MΩ
RLS
V
V
UV = 100 VDC
OV = 450 VDC
DC
Input
Voltage
DC
Input
Voltage
300 kΩ
DCMAX@100 VDC = 78%
DCMAX@375 VDC = 38%
D
S
L
D
S
L
CONTROL
CONTROL
C
C
For RIL = 12 kΩ
ILIMIT = 69%
X
See fig. 55 for other
resistor values (RIL)
to select different ILIMIT
ON/OFF
QR
RIL
12 kΩ
47 kΩ
-
-
values
PI-2640-040501
PI-2629-040501
Figure 29. Active-on Remote ON/OFF.
Figure 28. Line-Sensing and Externally Set Current Limit.
E
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August 8, 2000
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