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DPA425R-TL Datasheet(PDF) 13 Page - Power Integrations, Inc.

Part # DPA425R-TL
Description  Highly Integrated DC-DC Converter ICs for Distributed Power Architectures
PDF  36 Pages
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Manufacturer  POWERINT [Power Integrations, Inc.]
Direct Link  http://www.powerint.com
Logo POWERINT - Power Integrations, Inc.

DPA425R-TL Datasheet(HTML) 13 Page - Power Integrations, Inc.

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DPA423-426
13
K
1/04
Figure 15. Externally Set Current Limit.
Figure 16. Current Limit Reduction with Line Voltage.
X
PI-2836-011904
DC
Input
Voltage
+
-
D
S
C
R
IL
For RIL = 12 kΩ
ILIMIT = 64%
See Figure 34 for other
resistor values (RIL)
For RIL = 25 kΩ
ILIMIT = 34%
CONTROL
X
PI-2854-050602
DC
Input
Voltage
+
-
D
S
C
363 kΩ
R
LS
4.2 kΩ
R
IL
100% @ 36 VDC
64% @ 72 VDC
ILIMIT =
ILIMIT =
CONTROL
Figure 17. Active-on (Fail Safe) Remote ON/OFF.
Figure 18. Active-off Remote ON/OFF. Maximum Duty Cycle will
be reduced.
Figure 19. Active-on Remote ON/OFF with Externally Set Current
Limit.
Figure 20. Active-off Remote ON/OFF with Externally Set Current
Limit.
X
ON/OFF
47 kΩ
PI-2856-072602
DC
Input
Voltage
+
-
D
S
C
R
IL
Q
R
For RIL = 12 kΩ
ILIMIT = 64%
For RIL = 25 kΩ
ILIMIT = 34%
QR can be an optocoupler
output or can be replaced
by a MOSFET or manual
switch.
CONTROL
PI-2857-050602
DC
Input
Voltage
+
-
D
S
C
CONTROL
L
47 kΩ
Q
R
R
MC
37.4 kΩ
QR can be an
optocoupler output
or can be replaced
by a manual switch.
ON/OFF
X
R
IL
For RIL = 12 kΩ
ILIMIT = 64%
For RIL = 25 kΩ
ILIMIT = 34%
PI-2855-050602
DC
Input
Voltage
+
-
D
S
C
CONTROL
L
47 kΩ
Q
R
R
MC
37.4 kΩ
QR can be an
optocoupler output or
can be replaced
by a manual switch.
ON/OFF
X
PI-2625-040501
DC
Input
Voltage
+
-
D
S
C
ON/OFF
47 KΩ
QR can be an optocoupler
output or can be replaced by
a manual switch.
Q
R
CONTROL
Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins (cont.)



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