HBC48T25120 Datasheet, PDF (10/16 Pages) Power-One – HBC48T25120 DC-DC Converter Data Sheet

HBC48T25120 DC-DC Converter Data Sheet
36-75 VDC Input; 12 VDC @ 25 A Output
Characterization (con’t)
Output Current Derating, f ( (T_A & Airflow)
Output Derating Current
28
24
20
16
12
400 LFM
8
300 LFM
200 LFM
4
100 LFM
30 LFM
0
25
40
55
70
85
Ambient Temperature (C)
Fig. 1 : Available load current vs. ambient air
temperature and airflow rates for single board
converter mounted horizontally with air flowing from
pin 4 to pin 1, MOSFET junction temperature ≤ 125
°C, Vin = 48 V.
Output Derating Current
28
24
20
16
12
400 LFM
8
300 LFM
200 LFM
4
100 LFM
30 LFM
0
25
40
55
70
85
Ambient Temperature (C)
Fig. 2: Available load current vs. ambient air
temperature and airflow rates for converter with
baseplate mounted horizontally with air flowing from
pin 4 to pin 1, baseplate temperature ≤ 110 °C, Vin =
48 V.
Efficiency, f ( Load Current & Vin)
0.96
0.92
0.88
0.84
36V
0.8
48V
75V
0.76
0
5
10
15
20
25
30
Load Current [A]
Fig. 3: Efficiency vs. load current and input voltage
for converter mounted vertically with air flowing from
pin 4 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25 °C.
0.96
0.94
0.92
0.9
40C
0.88
55C
70C
0.86
0
5
10
15
20
25
30
Iout [A]
Fig. 4: Efficiency vs. load current and ambient
temperature for converter mounted vertically with Vin
= 48 V and air flowing from pin 4 to pin 1 at a rate of
200 LFM (1.0 m/s).
MCD10127 Rev. 1.1, 09-Jun-10
Page 10 of 16
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