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TOP254PN Datasheet(PDF) 20 Page - Power Integrations, Inc.

Part No. TOP254PN
Description  Enhanced EcoSmart®, Integrated Off-Line Switcher with Advanced Feature Set and Extended Power Range
Download  48 Pages
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Maker  POWERINT [Power Integrations, Inc.]
Homepage  http://www.powerint.com
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TOP254PN Datasheet(HTML) 20 Page - Power Integrations, Inc.

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Rev. F 01/09
20
TOP252-262
www.powerint.com
Typical Uses of MULTI-FUNCTION (M) Pin (cont.)
PI-4757-120307
DC
Input
Voltage
Sense Output Voltage
+
-
DM
S
C
V
UV = IUV × RLS +VM (IM = IUV)
V
OV =IOV ×RLS +VM (IM = IOV)
For R
LS = 4 M
V
UV = 102.8 VDC
V
OV = 451 VDC
DC
MAX @ 100 VDC = 76%
DC
MAX @ 375 VDC = 41%
CONTROL
R
LS
4 M
10 k
Q
R
Reset
Figure 40. Line-Sensing for Undervoltage, Overvoltage, Line Feed-Forward and
Latched Output Overvoltage Protection with Device Reset.
PI-4736-060607
DC
Input
Voltage
+
-
D
S
C
R
IL
R
MC
24 k
12 k
M
CONTROL
Q
R
2R
IL
R
MC =
Q
R can be an optocoupler
output or can be replaced
by a manual switch.
ON/OFF
7 k
Figure 39. Active-off Remote ON/OFF with Externally Set Current Limit
(see M Pin Operation Description).
PI-4735-092107
DC
Input
Voltage
+
-
D
S
C
Q
R
R
IL
M
CONTROL
12 k
For R
IL =
I
LIMIT = 61%
Q
R can be an optocoupler
output or can be replaced
by a manual switch.
ON/OFF
16 k
19 k
For R
IL =
I
LIMIT = 37%
Figure 38. Active-on Remote ON/OFF with Externally Set Current Limit
(see M Pin Operation Description).
PI-2519-040501
DC
Input
Voltage
+
-
D
S
C
Q
R
ON/OFF
M
CONTROL
Q
R can be an optocoupler
output or can be replaced
by a manual switch.
47 k
Figure 37. Active-on (Fail Safe) Remote ON/OFF.


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