VCN60/70 Series
High Ef?ciency, High Current Density, 60 or 70 Amp
Single Inline Package DC/DC Converters
Thermal Derating Curves for the 60 Amp rated VCN60BADJTU-1C
75
Maximum Current Thermal Derating, V OUT = 1.2V
65
Maximum Current Thermal Derating, V OUT = 2.5V*
70
65
60
55
50
45
Air?ow
200 LFM
300 LFM
400 LFM
500 LFM
60
55
50
45
40
Air?ow
200 LFM
300 LFM
400 LFM
500 LFM
25
30
35
40
45
50
55
60
65
25
30
35
40
45
50
55
60
65
Ambient Temperature (oC)
Ambient Temperature (oC)
75
70
Maximum Current Thermal Derating, V OUT = 1.5V
50
47.5
Maximum Current Thermal Derating, V OUT = 3.3V*
Air?ow
65
60
55
50
45
Air?ow
200 LFM
300 LFM
400 LFM
500 LFM
45
42.5
40
37.5
35
200 LFM
300 LFM
400 LFM
500 LFM
25
30
35
40
45
50
55
60
65
25
30
35
40 45 50 55
60
65
Ambient Temperature (oC)
Ambient Temperature (oC)
Maximum Current Thermal Derating, V OUT = 1.8V
75
The table shows the appropriate derated output current for running the unit at
70
65
Air?ow
200 LFM
70°C ambient temberature and respective air?ows.
VCN60BADJTU-1C DERATED OUTPUT CURRENT (AMPS) AT 70°C AMBIENT
60
55
50
300 LFM
400 LFM
500 LFM
300LFM
400LFM
500LFM
1.2V
49.6
52.0
55.0
1.5V
47.3
50.3
53.0
1.8V
46.0
49.0
51.3
2.5V*
40.5
43.5
47.0
3.3V*
37.5
40.5
43.3
45
25
30
35
40
45
50
55
60
65
Ambient Temperature (oC)
* IOutput loads in excess of ~140W are possible at higher V OUT settings (>2V), if proper Thermal Derating is maintained, and if V IN is high enough to limit input current to below 15A in
the 20A rated on board input fuse.
www.murata-ps.com/support
MDC_VCN60/70 Series.B09 Page 3 of 7
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