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PDF Q48DB12003NRFA Data sheet ( Hoja de datos )
| Número de pieza | Q48DB12003NRFA | |
| Descripción | DC/DC Power Modules | |
| Fabricantes | Delta Electronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de Q48DB12003NRFA (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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Delphi Series Q48DB, 65W Quarter Brick Dual Outputwww.DataSheet4U.com
DC/DC Power Modules: 48V in, ±12V, 2.7A Output
The Delphi Series Q48DB Quarter Brick, 48V input, positive and
negative bipolar dual output, and isolated DC/DC converters are the
latest offering from a world leader in power system and technology
and manufacturing ― Delta Electronics, Inc. This product family
provides positive and negative bipolar output (output voltage is 12V)
and up to 65 watts of power in an industry standard quarter brick
package size. Both output channels can be used independently. With
creative design technology and optimization of component placement,
these converters possess outstanding electrical and thermal
performance, as well as extremely high reliability under highly
stressful operating conditions. All models are fully protected from
abnormal input/output voltage, current, and temperature conditions.
The Delphi Series converters meet all safety requirements with basic
insulation.
FEATURES
High efficiency:90%@ ±12V/2.7A
Size: 57.9mm x 36.8mm x 8.5mm
(2.28”×1.45”×0.33”)
Industry standard pin out
Fixed frequency operation
Input UVLO, Output OCP, OVP, OTP
1500V isolation
Basic insulation
No minimum load required
Adjustable output voltage
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing
facility
UL/cUL 60950 (US & Canada) Recognized,
and TUV (EN60950) Certified
CE mark meets 73/23/EEC and 93/68/EEC
directives
OPTIONS
Positive On/Off logic
Short pin lengths available
APPLICATIONS
Telecom/DataCom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
DATASHEET
DS_ Q48DB12003_04182006
1 page  
ELECTRICAL CHARACTERISTICS CURVES
Figure 8: Output voltage response to step-change in load
current Iout1 (75%-50%-75% of Io, max; di/dt = 0.1A/µs,
200uS/DIV)). Vin=48V. Load cap: 10µF, tantalum capacitor
and 1µF ceramic capacitor. Top trace: Vout (100mV/div),
Bottom trace: Iout (1A/div). Scope measurement should be
made using a BNC cable (length short than 20 inch). Position
the load between 51 mm and 76 mm (2inch and 3 inch) from
the module
Figure 9: Output voltage response to step-change in load
current Iout2 (75%-50%-75% of Io, max; di/dt = 0.1A/µs,
200uS/DIV). Vin=48V. Load cap: 10µF, tantalum capacitor and
1µF ceramic capacitor. Top trace: Vout (100mV/div), Bottom
trace: Iout (1A/div). Scope measurement should be made using
a BNC cable (length short than 20 inch). Position the load
between 51 mm and 76 mm (2inch and 3 inch) from the module.
DS_Q48DB12003_04182006
5
5 Page 
THERMAL CONSIDERATIONS
Thermal management is an important part of the system
design. To ensure proper, reliable operation, sufficient
cooling of the power module is needed over the entire
temperature range of the module. Convection cooling is
usually the dominant mode of heat transfer.
Hence, the choice of equipment to characterize the thermal
performance of the power module is a wind tunnel.
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in heated
vertical wind tunnels that simulate the thermal
environments encountered in most electronics equipment.
This type of equipment commonly uses vertically mounted
circuit cards in cabinet racks in which the power modules
are mounted.
The following figure shows the wind tunnel characterization
setup. The power module is mounted on a test PWB and is
vertically positioned within the wind tunnel. The space
between the neighboring PWB and the top of the power
module is constantly kept at 6.35mm (0.25’’).
Thermal Derating
Heat can be removed by increasing airflow over the
module. The module’s maximum case temperature is
+123°C. To enhance system reliability, the power module
should always be operated below the maximum operating
temperature. If the temperature exceeds the maximum
module temperature, reliability of the unit may be affected.
FACING PWB
PWB
MODULE
THERMAL CURVES
Figure 20: Temperature measurement location
* The allowed maximum hot spot temperature is defined at 123℃.
Q48DB12003(Standard) Output Current vs. Ambient Temperature and Air Velocity
Output Current(A)
3.0
@Vin = 48V (Transverse Orientation)
600LFM
2.5
Natural
Convection
2.0
100LFM
1.5
500LFM
400LFM
200LFM
1.0
0.5 300LFM
0.0
55 60 65 70 75 80 85 90 95 1A00mbient Te1m05perature (1℃10)
Figure 21: Output current vs. ambient temperature and air velocity
@Vin = 48V(Transverse Orientation)
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
AIR FLOW
50.8 (2.0”)
12.7 (0.5”)
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches
Figure 19: Wind Tunnel Test Setup
DS_Q48DB12003_04182006
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet Q48DB12003NRFA.PDF ] | |
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