DFA20 Single-Output DC-DC Series Data Sheet
MCD10079 Rev. 1.3, 15-Jun-10 Page 4 of 4 www.power-one.com
120
100
60
CURRENT LIMIT MODE >
80
40
20
20
40 100 120 140
60 800
0
OUTPUT VOLTAGE Vs. OUTPUT LOAD
OUTPUT LOAD (%)
NORMALIZED OUTPUT (%)
Typical Performance: (Tc=25˚C, Vin=Nom VDC, Rated Load)
80
85
75
70
65
60
90
040
3020
LINE = 72VDC
LINE = 48VDC
LINE = 36VDC
10 50 60 70 80 90 100
48 VOLT EFFICIENCY Vs. LOAD
LOAD (%)
EFFICIENCY (%)
NOTES ON USING THE CURVES
1) The input currents are for 20 watts of output power. For
±5 volt output models the current is approximately 15% less.
2) The efficiency curves are for 12 volt output models. To use for other models, adjust as follows:
±5 volt models subtract approximately 3%.
±15volt models add approximately 1%.
80
75
70
65
85
040
3020
LINE = 18VDC
LINE = 12VDC
LINE = 9VDC
10 50 60 70 80 90 100
12 VOLT EFFICIENCY Vs. LOAD
LOAD (%)
EFFICIENCY (%)
85
80
75
70
65
16 1714 151312
100% FULL LOAD
50% FULL LOAD
109 11 18
12 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
EFFICIENCY (%)
80
85
75
70
65
90
040
3020
LINE = 36VDC
LINE = 24VDC
LINE = 18VDC
10 50 60 70 80 90 100
24 VOLT EFFICIENCY Vs. LOAD
LOAD (%)
EFFICIENCY (%)
85
80
75
70
90
18 30
32 34282624
100% FULL LOAD
50% FULL LOAD
20 22 36
24 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
EFFICIENCY (%)
85
75
80
70
65
60
90
36 60
64 68565248
100% FULL LOAD
50% FULL LOAD
40 44 72
48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
EFFICIENCY (%)
1.0
0.8
0.6
0.2
0.4
0.0
04030
20
100% LOAD
50% LOAD
10 50 60 8070
48 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
INPUT CURRENT (AMPS)
2.0
1.5
1.0
0.5
0.0
02015
10
100% LOAD
50% LOAD
525304035
24 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
INPUT CURRENT (AMPS)
4
3
2
1
0
08
64
100% LOAD
50% LOAD
2
10 12
1614 18
12 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
INPUT CURRENT (AMPS)
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or 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 respective
divisional 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.
