Datasheet

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ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
MDC_ULS-30W_C07 Page 19 of 30
TYPICAL PERFORMANCE CURVES, ULS-15/2-D48
Maximum Current Temperature Derating at Sea Level
(VIN = 36V, 48V, 60V, and 75V, airfl ow is from pin 3 to pin 1)
Effi ciency vs. Line Voltage and Load Current @ 25°C Power Dissipation vs. Load Current @ 25°C
0.21 0.39 0.57 0.75 0.93 1.11 1.29 1.47 1.65 1.83 2.01
75
77
79
81
83
85
87
89
91
VIN = 75V
V
IN = 60V
VIN = 48V
V
IN = 36V
Efficiency (%)
Load Current (Amps)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0.2 0.4 0.6 0.7 0.9 1.1 1.3 1.5 1.6 1.8 2.0
VIN = 75V
V
IN = 60V
VIN = 48V
V
IN = 36V
Loss (Watts)
Load Current (Amps)
1.5
2.0
2.5
30 35 40 45 50 55 60 65 70 75 80 85
Output Current (Amps)
Ambient Temperature (ºC)
0.33 to 2.0 m/s (65 to 400 LFM)
INFRARED THERMAL IMAGE, ULS-15/2-D48
Thermal image with hot spot at full load current with 25 °C ambient temperature. Natural convention is used with no forced airfl ow. Identifi able and recommended maximum value
to be verifi ed in application. Vin=48V, Q6 max Temp=120 °C/IPC9592 guidelines.
45.7°C
80.6°C
50
60
70
80
R6: 73
Q6: 75
T1: 62
(+Vin) (+Vout)
(-Vin) (-Vout)