bq50120qta20pys SynQor Worldwide Headquarters, bq50120qta20pys Datasheet - Page 5

• Manufacturer Part Number: bq50120qta20pys
• Description: Quarter-brick Dc Bus Converter
• Manufacturer: SynQor Worldwide Headquarters

Product # BQ50120QTA25
T
T
echnical S
echnical S
Figure 1: Efficiency at nominal output voltage vs. load current for min-
imum, nominal, and maximum input voltage at 25
Figure 3: Efficiency at nominal output voltage and 60% rated power vs.
airflow rate for ambient air temperatures of 25
(nominal input voltage).
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 pin 3 to pin 1 (nominal input voltage).
98
97
96
95
94
93
92
25
20
15
10
100
5
0
98
96
94
92
90
88
86
0
0
0
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
100
25
5
pecification
pecification
Ambient Air Temperature (
200
Load Current (A)
40
Phone [phone]
Air Flow
10
(LFM)
300
55
15
°
C, 40
°
o
C.
C)
°
C, and 55
400
20
70
43 Vin
48 Vin
52 Vin
www.synqor.com
25 C
40 C
55 C
°
C
500
25
85
Figure 2: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25
Figure 4: Output voltage regulation vs. load current for minimum, nom-
inal, and maximum input voltage at 25
Figure 6: Thermal plot of converter at 25 amp load current (300W)
with 55
converter from pin 3 to pin 1 (nominal input voltage).
12
10
15
14
13
12
11
10
8
6
4
2
0
9
8
0.0
0
°
C air flowing at the rate of 200 LFM. Air is flowing across the
Doc.# 005-2BQ512M Rev. C
2.5
43Vin
48Vin
53Vin
5.0
5
7.5
P
Semiconductor junction temperature is
P
Current:
within 1°C of surface temperature
Current:
ackage:
ackage:
Output:
Output:
Load Current (A)
10.0
Load Current (A)
10
Input:
Input:
12.5
°
C.
15.0
15
03/17/06
42-53 V
12 V
25 A
Quarter-brick
42-53 V
12 V
25 A
Quarter-brick
17.5
20.0
°
20
C.
22.5
43 Vin
48 Vin
52 Vin
25.0
Page 5
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