TOP242-250
Typical Uses of MULTI-FUNCTION (M) Pin (cont.)
+
+
For RIL = 12 kΩ
ILIMIT = 69%
ILIMIT = 100% @ 100 VDC
ILIMIT
=
RLS 2.5 MΩ
63% @ 300 VDC
For RIL = 25 kΩ
ILIMIT = 43%
DC
Input
Voltage
DC
Input
Voltage
See Figures 54b, 55b
and 56b for other resistor
values (RIL) to select
different ILIMIT values.
D
S
M
D
S
M
CONTROL
CONTROL
RIL
6 kΩ
C
RIL
C
-
-
PI-2517-022604
PI-2518-040501
Figure 34. Externally Set Current Limit (Not Normally Required-See
M Pin Operation Description).
Figure 35. Current Limit Reduction with Line Voltage (Not Normally
Required-See M Pin Operation Description).
+
+
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
D
S
M
D
M
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
Reduced.
M
18 12/04
POWERINT [ Power Integrations ]
