Datasheet
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TYPICAL PERFORMANCE DATA, ULS-3.3/20-D48
ULS 60-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
MDC_ULS Series.C02 Page 5 of 24
Maximum Current Temperature Derating at Sea Level
(Vin = 48V, longitudinal airflow)
Efficiency vs. Line Voltage and Load Current @ 25°C
60
65
70
75
80
85
90
95
100
3 4 6 8 10 12 14 16 18 20
VIN = 75V
V
IN = 48V
V
IN = 36V
Efficiency (%)
Load Current (Amps)
0
5
10
15
20
25
30 35 40 45 50 55 60 65 70 75 80 85
Output Current (Amps)
Ambient Temperature (ºC)
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)
(Resistive loads 50% with +25% step Vin=48V)
Transient Response (Load from 75% to 50%)
Enable Start-up
Enable Start-up (Vin=48V Iout=20A)
Ripple and Noise (1uF Ceramic and 10uF Tantalum Capcitors)
R/N Waveform (Vin=48V Iout=20A)
Transient Response (Load from 50% to 75%)
Enable Start-up (Vin=48V Iout=0A)
R/N Waveform (Vin=48V Iout=0A)