NQB-420NWA-AN Datasheet, PDF (15/30 Pages) CUI INC – FULLY REGULATED ADVANCED BUS CONVERTERS

CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 15 of 30
Typical Characteristics
12.45 V, 35 A / 415 W
Output Current Derating – Open frame
[A]
35
30
25
20
15
10
5
0
0
20
40
60
80
100 [°C]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Na t. Co nv.
Available load current vs. ambient air temperature and airflow at
V_I = 53 V. See Thermal Consideration section.
Output Current Derating – Base plate
[A]
35
30
25
20
15
10
5
0
0
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Na t. Con v.
20
40
60
80
100 [°C]
Thermal Resistance – Base plate
[°C/W]
6
5
4
3
2
1
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 [m/s]
Available load current vs. ambient air temperature and airflow at
V_I = 53 V. See Thermal Consideration section.
Output Current Derating – Base plate + Heat sink
[A]
35
30
25
20
15
10
5
0
0
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Na t. Con v.
20
40
60
80
100 [°C]
Available load current vs. ambient air temperature and airflow at
V_I = 53 V. See Thermal Consideration section. Tested with Plate Fin
Transverse heatsink, height 0.23 In, P0114 Thermal Pad.
Thermal resistance vs. airspeed measured at the converter. Tested in
wind tunnel with airflow and test conditions as per the Thermal
consideration section. V_I = 53 V.
Output Current Derating – Cold wall sealed box
A
40
35
30
25
20
15
10
5
0
0
20
40
60
80
100 [°C]
Ta mb
85 °C
Available load current vs. base plate temperature at 85ºC ambient.
V_I = 53 V. See Thermal Consideration section.
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