Datasheet
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TYPICAL PERFORMANCE DATA, ULS-12/5-D48
ULS 60-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
MDC_ULS Series.C02 Page 14 of 24
Maximum Current Temperature Derating at Sea Level
(Vin = 48V, airflow is from Vin to Vout)
Efficiency and Power Dissipation vs. Line Voltage and Load Current @ 25°C
50
55
60
65
70
75
80
85
90
95
100
2
3
4
5
6
7
8
9
10
11
12
0.50 0.95 1.40 1.85 2.30 2.75 3.20 3.65 4.10 4.55 5.00
VIN = 75V
V
IN = 48V
V
IN = 36V
Power Dissipation
(Vin = 48V)
Efficiency (%)
Load Current (Amps)
Loss (Watts)
30 35 40 45 50 55 60 65 70 75 80 85
0
1
2
3
4
5
6
Natural convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
Output Current (Amps)
Ambient Temperature (ºC)
Enable Start-up (Vin=48V, Iout=5A, Cload=1000uF Ta=+25°C) Trace 2=Output,
Trace 4= Enable.
Enable Start-up (Vin=48V, Iout=5A, Ta=+25°C) Trace 2=Output, Trace 4= Enable. Enable Start-up (Vin=48V, Iout=0A, Ta=+25°C) Trace 2=Output, Trace 4= Enable.