Typical Performance: (Tc=25 C, Vin=Nom VDC, Rated Load)
85
80
75
70
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
915
13 14 17161211
100% FULL LOAD
50% FULL LOAD
10 18
12 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
EFFICIENCY (%)
90
80
85
75
70
040
3020
LINE = 36VDC
LINE = 24VDC
LINE = 18VDC
10 50 60 70 80 90 100
24 VOLT EFFICIENCY Vs. LOAD
LOAD (%)
EFFICIENCY (%)
90
85
80
75
18 30
26 28 34322422
100% FULL LOAD
50% FULL LOAD
20 36
24 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
EFFICIENCY (%)
90
80
75
60
040
3020
LINE = 72VDC
LINE = 48VDC
LINE = 36VDC
10 50 60 70 80 90 100
48 VOLT EFFICIENCY Vs. LOAD
LOAD (%)
EFFICIENCY (%)
90
85
80
75
70
36 60
52 56 68644844
100% FULL LOAD
50% FULL LOAD
40 72
48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
EFFICIENCY (%)
1.00
0.50
0.75
0.25
0.00
040
3020
100% LOAD
50% LOAD
10 50 60 70 80
48 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
INPUT CURRENT (AMPS)
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%.
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.
2.0
1.0
1.5
0.5
0.0
016
128
100% LOAD
50% LOAD
4202428 32 36
24 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
INPUT CURRENT (AMPS)
3.5
3.0
2.0
2.5
1.0
1.5
0.5
0.0
08
64
100% LOAD
50% LOAD
2101214 16 18
12 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
LINE INPUT (VOLTS)
INPUT CURRENT (AMPS)
DFA20 Dual-Output DC-DC Series Data Sheet
MCD10174 Rev. 1.0, 15-Jun-10 Page 4 of 4 www.power-one.com
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.
