Datasheet
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UEI Series
50-60W Isolated Wide-Range DC/DC Converters
MDC_UEI Series 50-60W.C10 Page 6 of 14
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72
74
76
78
80
82
84
86
88
90
92
V
IN
= 36V
V
IN
=
18V
V
IN
=
24V
V
IN
= 60V
V
IN
= 75V
V
IN
=
48V
Efficiency (%)
UEI-5/12-Q48
Efficiency vs. Line Voltage and Load Current @ 25ºC
Load Current (Amps)
8.5
9
9.5
10
10.5
11
11.5
12
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
100 LFM
Natural Convection
200 LFM
300 LFM
400 LFM
Output Current (Amps)
Ambient Temperature (
°
C)
UEI-5/12-Q48N Maximum Current Temperature Derating at Sea Level
(V
IN = 48V, air flow is from pin 1 to pin 2)
60.0
62.5
65.0
67.5
70.0
72.5
75.0
77.5
80.0
82.5
85.0
87.5
90.0
92.5
0.31 0.69 1.13 1.48 1.87 2.25 2.64 3.01 3.42 3.81 4.20
V
IN
= 36V
V
IN
=
9V
V
IN
=
24V
Efficiency (%)
UEI-12/4.2-Q12
Efficiency vs. Line Voltage and Load Current @ 25ºC
Load Current (Amps)
3.80
3.85
3.90
3.95
4.00
4.05
4.10
4.15
4.20
4.25
40 45 50 55 60 65 70 75 80 85 90
100 LFM
Natural Convection
200 LFM
300 LFM
Output Current (Amps)
Ambient Temperature (
°
C)
UEI-12/4.2-Q12 Maximum Current Temperature Derating at Sea Level
(V
IN = 24V, airflow is from pin 1 to pin 2)
Typical Performance Curves
66
68
70
72
74
76
78
80
82
84
86
88
90
92
0.5 1 1.75 2.5 3 3.5 4 4.5 5
V
IN
= 36V
V
IN
= 18V
V
IN
= 24V
V
IN
= 75V
V
IN
= 48V
Efficiency (%)
UEI-12/5-Q48
Efficiency vs. Line Voltage and Load Current @ 25ºC
Load Current (Amps)
2.95
3.2
3.45
3.7
3.95
4.2
4.45
4.7
4.95
5.2
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
100 LFM
Natural Convection
200 LFM
300 LFM
400 LFM
Output Current (Amps)
Ambient Temperature (
°
C)
UEI-12/5-Q48 Maximum Current Temperature Derating at Sea Level
(V
IN = 48V, air flow is from pin 2 to pin 1)