Datasheet

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ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
MDC_ULS-30W_C07 Page 15 of 30
TYPICAL PERFORMANCE CURVES, ULS-12/2.5-D48
Maximum Current Temperature Derating at Sea Level
(VIN = 36V, 48V, and 75V, airfl ow is from pin 3 to pin 1)
Maximum Current Temperature Derating at Sea Level
(VIN = 60V, 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
75
77
79
81
83
85
87
89
0.25 0.48 0.70 0.93 1.15 1.38 1.60 1.83 2.05 2.28 2.50
VIN = 75V
V
IN = 60V
V
IN = 48V
V
IN = 36V
Efficiency (%)
Load Current (Amps)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0.3 0.5 0.7 0.9 1.2 1.4 1.6 1.8 2.1 2.3 2.5
VIN = 75V
V
IN = 60V
VIN = 48V
V
IN = 36V
Loss (Watts)
Load Current (Amps)
2.0
2.5
3.0
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)
2.0
2.5
3.0
30 35 40 45 50 55 60 65 70 75 80 85
0.33 m/s (65 LFM)
0.5 to 2.0 m/s (100 to 400 LFM)
Output Current (Amps)
Ambient Temperature (ºC)
INFRARED THERMAL IMAGE, ULS-12/2.5-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.
41.0°C
88.5°C
50
60
70
80
R6: 78
Q6: 79
T1: 67
CR17: 72
(+Vin) (+Vout)
(-Vin) (-Vout)