TOP242-249
Typical Uses of MULTI-FUNCTION (M) Pin (cont.)
+
+
QR can be an optocoupler
output or can be replaced
by a manual switch.
QR can be an optocoupler
output or can be replaced by
a manual switch.
QR
47 kΩ
DC
Input
Voltage
DC
Input
Voltage
ON/OFF
RMC
45 kΩ
M
D
S
M
D
CONTROL
CONTROL
C
QR
C
ON/OFF
47 kΩ
-
S
-
PI-2519-040501
PI-2522-040501
Figure 36. Active-on (Fail Safe) Remote ON/OFF.
Figure 37. Active-off Remote ON/OFF. Maximum Duty Cycle will
be Reduced.
+
+
QR can be an optocoupler
output or can be replaced
by a manual switch.
Q
R can be an optocoupler
output or can be replaced
by a manual switch.
For RIL = 12 kΩ
QR
ON/OFF
ILIMIT = 69 %
DC
Input
DC
Input
Voltage
47 kΩ
For RIL = 25 kΩ
Voltage
RMC
24 kΩ
RMC = 2RIL
ILIMIT = 43 %
D
S
M
RIL
QR
D
M
CONTROL
CONTROL
C
RIL
C
12 kΩ
ON/OFF
47 kΩ
-
S
-
PI-2520-040501
PI-2521-040501
Figure 38. Active-on Remote ON/OFF with Externally Set
Current Limit.
Figure 39. Active-off Remote ON/OFF with Externally Set
Current Limit.
QR can be an optocoupler
output or can be replaced
by a manual switch.
+
RLS
2 MΩ
QR
DC
Input
ON/OFF
47 kΩ
For RLS = 2 MΩ
Voltage
D
M
V
UV = 100 VDC
CONTROL
VOV = 450 VDC
C
S
-
PI-2523-040501
Figure 40. Active-off Remote ON/OFF with LINE-SENSE.
E
7/01
August 8, 2000
20
POWERINT [ Power Integrations ]
