Typical Uses Of Multi-Function (M) Pin - Power integrations TOPSwitch-HX Series Manual

TOP252-262
Typical Uses of VOLTAGE MONITOR (V) and EXTERNAL CURRENT LIMIT (X) Pins (cont.)
+
DC
D
Input
Voltage
TOP259-261YN would
S
use the G pin as the
return for Q .
R
-
Figure 26. Active-on Remote ON/OFF with Line-Sense and External
Current Limit.

Typical Uses of MULTI-FUNCTION (M) Pin

+
DC
Input
Voltage
D
S
-
Figure 29. Three Terminal Operation (MULTI-FUNCTION Features Disabled).
18
Rev. J 08/16
V = I × R + V (I
UV UV LS V
V = I × R + V (I
OV OV LS V
DC @100 VDC = 76%
4 MΩ
R MAX
LS
DC @375 VDC = 41%
MAX
Q can be an optocoupler
R
output or can be replaced
V
by a manual switch.
CONTROL
C
For R = 12 kΩ
IL
I = 61%
LIMIT
X
R
IL Q
ON/OFF
R
16 kΩ
PI-4725-011008
+
DC
Input
Voltage
10 kΩ
Reset
Q
R
-
Figure 28. Line-Sensing for Undervoltage, Overvoltage, Line Feed-Forward and
Latched Output Overvoltage Protection with Device Reset.
D C
M
S S S S
M
D
CONTROL
C
PI-4727-061207
= I ) +
V UV
= I )
V oV
DC
Input
Voltage
TOP259-261YN would
use the G pin as the
return for R .
IL
-
Figure 27. Line Sensing and Externally Set Current Limit.
V = I × R + V
UV UV LS
V = I × R + V
OV OV LS
For R = 4 MΩ
LS
V = 102.8 VDC
R 4 MΩ
UV
LS
V = 451 VDC
OV
Sense Output Voltage
DC @ 100 VDC = 76%
MAX
DC @ 375 VDC = 41%
MAX
D V
CONTROL
C
S
PI-4756-121007
+
DC
Input
Voltage
S C
-
Figure 30. Line Sensing for Undervoltage, Overvoltage and Line Feed-Forward.
V = I x R
UV UV
V = I x R
OV OV
For R = 4 MΩ
LS
4 MΩ
R
LS
V = 102.8 VDC
UV
V = 451 VDC
OV
DC @ 100 VDC = 76%
MAX
D V
DC @ 375 VDC = 41%
MAX
CONTROL
C
For R
IL
I
S X LIMIT
See Figure 55b for
R
other resistor values
IL
12 kΩ
(R ) to select different
IL
I values.
LIMIT
(I = I )
V V UV
(I = I )
V V OV
V = I × R
UV UV
V = I × R
OV OV
For R = 4 MΩ
LS
V = 102.8 VDC
R
4 MΩ
UV
LS
V = 451 VDC
OV
DC @ 100 VDC = 76%
MAX
DC @ 375 VDC = 41%
MAX
D M
CONTROL
C
S
+ V (I = I )
LS V V UV
+ V (I = I )
LS V V oV
= 12 kΩ
= 61%
+ V (I = I )
LS M M UV
+ V (I = I )
LS M M OV
PI-4728-120307
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