Datasheet
Output Current (Amps)
Ambient Temperature (
°
C)
400 lfm
200 lfm
300 lfm
100 lfm
30
32
24
28
26
36
40
34
38
30 40 50 60 70 80
UCH-2.5/40-D48 Maximum Current Temperature Derating (at sea level)
No baseplate, VIN = 48V, transverse airflow
10
15
20
25
30
35
40
45
30 35 40 45 50 55 60 65 70 75 80 85
400 lfm
200 lfm
300 lfm
100 lfm
UCH-1.8/40-D48 Maximum Current Temperature Derating (at sea level)
No baseplate, VIN = 48V, airflow is from VIN to VOUT
Output Current (Amps)
Ambient Temperature (
°
C)
V
IN
= 48V
V
IN
= 75V
Efficiency (%)
Power Dissipation (Watts)
Load Current (Amps)
V
IN
= 36V
65
75
60
70
85
80
90
63 9 12 15 18 21 24 27
95
Power Dissipation
(V
IN
= 48V)
0
1
3
5
2
4
6
8
10
7
9
UCH-2.5/40-D48 Efficiency and Power Dissipation
vs Line Voltage and Load Current @25˚C
4 8 12 16 20 24 28 32 36 40
UCH-1.8/40-D48 Efficiency and Power Dissipation
vs Line Voltage and Load Current @25˚C
V
IN
= 48V
V
IN
= 75V
Efficiency (%)
Power Dissipation (Watts)
Load Current (Amps)
V
IN
= 36V
Power Dissipation
(V
IN
= 48V)
40
45
50
55
60
65
70
75
80
85
90
95
0
1.1
2.2
3.3
4.4
5.5
6.6
7.7
8.8
9.9
11
12.1
V
IN
= 48V
V
IN
= 36V
Efficiency (%)
Load Current (Amps)
V
IN
= 75V
435
65
70
75
80
85
90
95
6789 10
Power Dissipation
(V
IN
= 48V)
UCH-3.3/10-D48 Maximum Current Temperature Derating
vs Line Voltage and Load Current @25˚C
Power Dissipation (Watts)
3.2
3.4
3.6
3.8
4
2.8
3.0
V
IN
= 24V
V
IN
= 18V
Efficiency (%)
Load Current (Amps)
V
IN
= 36V
75
70
65
85
80
90
4356789 10
Power Dissipation
(V
IN
= 24V)
UCH-3.3/10-D24 Efficiency and Power Dissipation
vs Line Voltage and Load Current @25˚C
Power Dissipation (Watts)
6
1
2
3
4
5
TYPICAL PERFORMANCE DATA
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Single Output UCH Models
Isolated, “Half-Brick”
1.8−15V Output DC/DC Converters
MDC_UCH Models.C01 Page 9 of 18