DFC15U48S12(2000) Ver la hoja de datos (PDF) - Power-One Inc.
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DFC15U48S12 Datasheet PDF : 3 Pages
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DFC15 SERIES – SINGLE OUTPUT
+ INPUT 1
– INPUT 2
ON/OFF 3
DFC15 SERIES BLOCK DIAGRAM
SHIELDED ISOLATION TRANSFORMER
CURRENT
MODE
PWM
+
+
+
ISOLATED
–
FEEDBACK
5 + OUTPUT
6 - OUTPUT
7 TRIM
OUTPUT POWER DERATING
15
10
5
FIVE SIDED SHIELDED COPPER CASE
LOW TC
BANDGAP
REFERENCE
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.
Typical Performance: (Tc=25°C, Vin=Nom VDC, Rated Load)
EFFICIENCY Vs. LINE INPUT VOLTAGE
85
50% FULL LOAD
82
100% FULL LOAD
80
77
75
20 25 30 35 40 45 50 55 60
LINE INPUT (VOLTS)
EFFICIENCY Vs. LOAD
90
LINE = 20VDC
85
80 LINE = 48VDC
75
70
65
LINE = 60VDC
60
0 10 20 30 40 50 60 70 80 90 100
LOAD (%)
Output TRIM
The TRIM pin may be used to adjust the
output ±5% from the nominal setting. This
function allows adjustment for voltage drops in
the system wiring, as well 5.2 volt outputs for
ECL applications. Figure 1 shows the proper
connections to use this function. A trimpot
value of 10K⍀ should be used for 5 volt
outputs. A trimpot value of 20K⍀ should be
used for 12 and 15 volt outputs. If the TRIM
function is not required the pin may be left
floating.
INPUT RIPPLE Vs. LINE INPUT
1.00
100% FULL LOAD
0.80
75% FULL LOAD
0.60
50% FULL LOAD
0.40
0.20
20 25 30 35 40 45 50 55 60
LINE INPUT (VOLTS)
+OUT 5
TRIM 7
-OUT 6
10K LOAD
+OUT 5
TRIM 7
-OUT 6
TRIM
DOWN
TRIM
UP
LOAD
USING TRIMPOT
Figure 1. USING FIXED RESISTORS
INPUT CURRENT Vs. INPUT VOLTAGE
1.2
1.0
0.8
0.6
100% LOAD
0.4
0.2
0.0
0
50% LOAD
10
20
30
40
50
60
LINE INPUT (VOLTS)
OUTPUT VOLTAGE Vs. OUTPUT LOAD
120
100
80
60
40
20
0
0 20 40 60 80 100 120 140 160 180
OUTPUT LOAD (%)
NUCLEAR AND MEDICAL APPLICATIONS Power-One products are not authorized for use as critical components in life support systems, equipment used in hazardous environments,
or nuclear control systems without the express written consent of the President of Power-One, Inc.
TECHNICAL REVISIONS The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are
subject to change without notice.
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