PQ60033HPA70 Datasheet, PDF (5/13 Pages) SynQor Worldwide Headquarters – Half-brick DC/DC Converter

Technical Specification
Input: 35-75 V
Output: 3.3 V
Current: 70 A
Package: Half-brick
100
95
90
85
80
75
70
65
0
35 Vin
48 Vin
75 Vin
10
20
30
40
50
60
70
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for min-
imum, nominal, and maximum input voltage at 25°C.
95
94
93
92
91
90
89
0
25 C
40 C
55 C
100
200
300
400
500
Air Flow (LFM)
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C
(nominal input voltage).
25
20
15
10
35 Vin
5
48 Vin
75 Vin
0
0
10
20
30
40
50
60
70
Load Current (A)
Figure 3: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25°C.
14
13
12
11
10
25 C
9
40 C
55 C
8
0
100
200
300
400
500
Air Flow (LFM)
Figure 4: Power dissipation at nominal output voltage and 60% rated
power vs. airflow rate for ambient air temperatures of 25°C, 40°C, and
55°C (nominal input voltage).
70
60
50
40
30
400 LFM (2.0 m/s)
20
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
10
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
0
0
25
40
55
70
85
Ambient Air Temperature (^oC)
Figure 5: Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 50 LFM through 400 LFM with air flowing
from input to output (nominal input voltage).
Figure 6: Thermal plot of converter at 57 amp load current with 55°C
air flowing at the rate of 200 LFM. Air is flowing across the converter
from input to output (nominal input voltage).
Product # PQ60033HPA70
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www.synqor.com
Doc.# 005-2HP633K Rev. A 12/20/04
Page 5