PAH 28Vout, 450-Watt Series
Isolated, 450-Watt, Half-Brick DC-DC Converter
TYPICAL PERFORMANCE DATA, PAH-28/16-D48
Efficiency and Power Dissipation @ Ta = +25°C
Output Power Derating in Conduction Cooling (Cold Baseplate) Applications
(Vin=48V, Ambient Temperature <70°C)
95
93
90
88
35
32
29
26
23
20
17
14
11
8
475
450
425
400
375
350
VIN = 75V
VIN = 48V
VIN = 36V
85
83
80
78
75
73
70
Power Dissipation
VIN = 48V
5
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
Iout (Amps)
20
30
40
50
60
70
80
90
100
Cold Baseplate (Interior) Temperature (°C)
Maximum Current Temperature Derating at sea level
Maximum Current Temperature Derating at sea level
(Vin=48V, transverse airflow, on 10˝ x 10˝ PCB with baseplate)
(Vin=48V, longitudinal airflow, on 10˝ x 10˝ PCB with baseplate)
18
18
16
14
12
10
8
16
14
12
10
8
0.25 m/s (50 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
2.5 m/s (500 LFM)
3.0 m/s (600 LFM)
0.25 m/s (50 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
2.5 m/s (500 LFM)
3.0 m/s (600 LFM)
6
6
4
4
2
2
0
0
30
35
40
45
50
55
60
65
70
75
80
85
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (°C)
Ambient Temperature (°C)
Maximum Power Temperature Derating at sea level
Maximum Power Temperature Derating at sea level
(Vin=48V, transverse airflow, on 10˝ x 10˝ PCB with baseplate)
(Vin=48V, longitudinal airflow, on 10˝ x 10˝ PCB with baseplate)
460
420
380
340
300
260
220
180
140
100
460
420
380
340
300
260
220
180
140
100
0.25 m/s (50 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
2.5 m/s (500 LFM)
3.0 m/s (600 LFM)
0.25 m/s (50 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
2.5 m/s (500 LFM)
3.0 m/s (600 LFM)
30
35
40
45
50
55
60
65
70
75
80
85
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (°C)
Ambient Temperature (°C)
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MDC_PAH-28Vout-450W.B04 Page 5 of 16