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PDF BQ50120QTA20NNS Data sheet ( Hoja de datos )
| Número de pieza | BQ50120QTA20NNS | |
| Descripción | DC to DC Converter | |
| Fabricantes | SynQor | |
| Logotipo |  |
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Technical Specification
Quarter
Brick
48Vin 12Vout 20A
Narrow Input, Isolated DC/DC Bus Converter
The BusQor™ BQ50120QTA20 bus converter is a
next-generation, board-mountable, isolated, fixed
switching frequency dc/dc converter that uses synchro-
nous rectification to achieve extremely high conversion
efficiency. The power dissipated by the converter is so
Bus
Converter
low that a heatsink is not required, which saves cost,
weight, height, and application effort. The BusQor
series provides an isolated step down voltage from 48V
to 12V with no regulation in a standard “quarter-brick”
module. BusQor converters are ideal for customers who
need multiple outputs and wish to design their owDnataSheet4U.com
point of load converters to work with a 12V rail.
BQ50120QTA20 Module
DataShee
Operational Features
• Ultra-high efficiency, >96% at full rated load current
• Delivers up to 20 amps (240 Watts) of output current
(power) with minimal derating - no heatsink required
• Input voltage range: 42V – 53V provides 12V bus
for distributed power architectures
• Fixed frequency switching provides predictable EMI
performance
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Industry standard size: 1.45” x 2.3”
• Total height only 0.43”, permits better airflow and
smaller card pitch
• Total weight: 1.5 oz. (42 grams)
Control Features
• On/Off control referenced to input side (positive
logic)
DataSheet4U.com
Protection Features
• Input under-voltage lockout and over-voltage
shutdown protects against abnormal input voltages
• Output current limit and short circuit protection
• Output over-voltage protection
• Thermal shutdown
Safety Features
• 2000V, 10 MΩ input-to-output isolation
• UL/cUL 60950 recognized (US & Canada), basic
insulation rating
• TUV certified to EN60950
• Meets 72/23/EEC and 93/68/EEC directives
• Meets UL94V-0 flammability requirements
Product # BQ50120QTA20
DataSheet4 U .com
Phone 1-888-567-9596
Doc.# 005-2BQ5D1a2tJaSRheve.e1t40U.com1/14/03
Page 1
1 page  
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Performance Curves
Quarter
Brick
48Vin 12Vout 20A
100
98
96
94
92
90
88
86
84 42 Vin
82
48 Vin
52 Vin
80
0 2 4 6 8 10 12 14 16 18 20
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for min-
imum, nominal, and maximum input voltage at 25°C.
10
9
8
7
6
5
4
3
2 42 Vin
1 48 Vin
52 Vin
0
0 2 4 6 8 10 12 14 16 18 20
Load Current (A)
Figure 2: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25°C.
98 15
et4U.com 97
14
96
95
94
93
92
0
13
DataSheet4U.com
12
11
25 C
40 C
55 C
100 200 300 400 500
Air Flow (LFM)
10
9
8
0
42Vin
48Vin
52Vin
24
6 8 10 12 14 16 18 20
Load Current (A)
Figure 3: 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).
Figure 4: Output voltage regulation vs. load current for minimum, nom-
inal, and maximum input voltage at 25°C.
DataShee
20
18
16
14
12
10
8
6
4
2
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)
0 LFM (0 m/s)
25 40 55 70
Ambient Air Temperature (oC)
85
DataSheFeitg4uUre.5c:oMmaximum output power derating curves vs. ambient air tem-
perature for airflow rates of 0 LFM through 400 LFM with air flowing
from pin 3 to pin 1 (nominal input voltage).
Product # BQ50120QTA20
DataSheet4 U .com
Phone 1-888-567-9596
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 6: Thermal plot of converter at 20 amp load current (240W)
with 55°C air flowing at the rate of 200 LFM. Air is flowing across the
converter from pin 3 to pin 1 (nominal input voltage).
Doc.# 005-2BQ5D1a2tJaSRheve.e1t40U.com1/14/03
Page 5
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| PDF Descargar | [ Datasheet BQ50120QTA20NNS.PDF ] | |
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