ALQ25B50_03 Datasheet, PDF (8/11 Pages) Astec America, Inc – Industry Standard ¼ Brick: 300W DC Transformer

Technical Reference Notes
ALQ25B50 Bus Converter
DC Transformer
Performance Curves
Efficiency Curves
Efficiency vs. Output Load, T_A = 25ºC
98%
96%
94%
92%
90%
88%
86%
42V
84%
48V
82%
53V
80%
0
5
10
15
20
25
Output Current [A]
Figure 3. Efficiency vs. Output current at T_A = 25ºC with
400LFM airflow directed across pin 3 to 1.
Power Dissipation at T_A=25ºC
16
14
42Vin
48Vin
12
53Vin
10
8
6
4
2
0
0
5
10
15
20
25
Output Current [A]
Figure 4. Power dissipation curves at T_A = 25ºC with
400LFM airflow directed across pin 3 to 1.
Efficiency vs. Output Load, T_A=70ºC
98%
96%
94%
92%
90%
88%
86%
84%
82%
80%
0
42Vin
48Vin
53Vin
5
10
15
20
25
Output Current [A]
18
16
14
12
10
8
6
4
2
0
0
Power Dissipation at T_A=70ºC
42Vin
48Vin
53Vin
5
10
15
20
25
Output Current [A]
Figure 5. Efficiency vs. Output current at T_A = 70ºC with
400LFM airflow directed across pin 3 to 1.
Figure 6. Efficiency vs. Output current at T_A=70ºC with
400LFM airflow directed across pin 3 to 1.
MODEL: ALQ25B50 SERIES
SEPTEMBER 11, 2003 - REVISION A (PRELIMINARY)
SHEET 8 OF 11