DFC15U48D15 Просмотр технического описания (PDF) - Power-One Inc.
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DFC15U48D15 Datasheet PDF : 3 Pages
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+ INPUT 1
– INPUT 2
ON/OFF 3
DFC15 SERIES – DUAL OUTPUT
LC
INPUT
FILTER
DFC15 SERIES BLOCK DIAGRAM
ISOLATION TRANSFORMER
THERMAL SHUTDOWN
CURRENT
MODE
PWM
+
+
+
ISOLATED
–
FEEDBACK
FIVE SIDED SHIELDED COPPER CASE
LOW TC
BANDGAP
REFERENCE
4 + OUTPUT
5 CMN
6 – OUTPUT
7 TRIM
OUTPUT POWER DERATING
15
10
5
0
40
50
60
70
80
90
AMBIENT TEMPERATURE
APPLICATION NOTES (cont’d):
Remote ON/OFF Operation
The remote ON/OFF pin may be left
floating if this function is not used. It is
recommended to drive this pin with an
open collector arrangement or a relay
contact. When the ON/OFF pin is pulled
low with respect to the -INPUT, the
converter is placed in a low power drain
state. Do not drive this input from a logic
gate directly; there is a 100K⍀ internal
pull-up resistor to a 9 volt source.
Output TRIM
The TRIM pin may be used to adjust the
output +5% to -34% from the nominal
setting. This function allows adjustment for
voltage drops in the system wiring. As well
5.2 volt Figure 1 shows the proper
connections to use this function. A trimpot
value of 10K⍀ or a fixed resistor may be
used. If the TRIM function is not required
the pin may be left floating.
Typical Performance: (Tc=25°C, Vin=Nom VDC, Rated Load)
EFFICIENCY Vs. LINE INPUT VOLTAGE (12V OUTPUT)
90
50% FULL LOAD
85
80
100% FULL LOAD
75
20 24 28 32 36 40 44 48 52 56 60 64 68 72
LINE INPUT (VOLTS)
INPUT RIPPLE Vs. LINE INPUT (12V OUTPUT)
1.0
100% FULL LOAD
0.8
0.6
75% FULL LOAD
0.4
50% FULL LOAD
0.2
0.0
20 24 28 32 36 40 44 48 52 56 60 64 68 72
LINE INPUT (VOLTS)
INPUT CURRENT Vs. LINE INPUT (12V OUTPUT)
1.2
0.9
100% FULL LOAD
0.6
0.3
0.0
0
50% FULL LOAD
8 16 24 32 40 48 56 64 72
LINE INPUT (VOLTS)
OUTPUT VOLTAGE Vs. OUTPUT LOAD (12V OUTPUT)
120
100
80
60
40
20
0
0 50 100 150 200 250 300 350 400
OUTPUT LOAD (%)
+OUT 4
TRIM 7
-OUT 6
10K LOAD
+OUT 4
TRIM 7
-OUT 6
TRIM
DOWN
TRIM
UP
LOAD
USING TRIMPOT
USING FIXED RESISTORS
Figure 1.
EFFICIENCY Vs. LOAD (12V OUTPUT)
90
LINE =
20VDC
80
LINE =
48VDC
70
LINE =
72VDC
60
0 10 20 30 40 50 60 70 80 90 100
LOAD (%)
3
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