Datasheet
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UEI Series
50-60W Isolated Wide-Range DC/DC Converters
MDC_UEI Series 50-60W.C10 Page 7 of 14
0.82 1.06 1.32 1.57 1.82 2.07 2.32 2.57 2.82 3.07 3.3
2
77.0
79.5
82.0
84.5
87.0
89.5
92.0
V
IN
= 12V
V
IN
=
9V
V
IN
= 36V
V
IN
=
24V
Efficiency (%)
UEI-15/3.3-Q12
Efficiency vs. Line Voltage and Load Current @ 25ºC
Load Current (Amps)
70 75 80 85
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
100 LFM
Natural Convection
200 LFM
300 LFM
Output Current (Amps)
Ambient Temperature (
°
C)
UEI-15/3.3-Q12 Maximum Current Temperature Derating at Sea Level
(V
IN = 12V, open frame, air flow is from pin 1 to pin 2)
70 75 80 85
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
100 LFM
Natural Convection
200 LFM
300 LFM
Output Current (Amps)
Ambient Temperature (
°
C)
UEI-15/3.3-Q12 Maximum Current Temperature Derating at Sea Level
(V
IN = 24V, open frame, air flow is from pin 1 to pin 2)
Typical Performance Curves
1.5 1.7 2.0 2.2 2.5 2.7 3.0 3.2 3.5 3.7 4.0
76
78
80
82
84
86
88
90
92
77
79
81
83
85
87
89
91
V
IN
= 18V
V
IN
= 24V
V
IN
= 75V
V
IN
= 48V
Efficiency (%)
UEI-15/4-Q48N-C
Efficiency vs. Line Voltage and Load Current @ 25ºC
Load Current (Amps)
25 30 35 40 45 50 55 60 65 70 75 80 85
2.0
2.5
3.0
3.5
4.0
100 LFM
Natural Convection
200 LFM
300 LFM
400 LFM
Output Current (Amps)
Ambient Temperature (
°
C)
UEI-15/4-Q48 Maximum Current Temperature Derating at Sea Level
(V
IN = 24V, transverse airflow)
25 30 35 40 45 50 55 60 65 70 75 80 85
2.0
2.5
3.0
3.5
4.0
100 LFM
Natural Convection
200 LFM
300 LFM
400 LFM
Output Current (Amps)
Ambient Temperature (
°
C)
UEI-15/4-Q48 Maximum Current Temperature Derating at Sea Level
(V
IN = 48V, transverse airflow)