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PDF Q48DW3R312NRFA Data sheet ( Hoja de datos )
| Número de pieza | Q48DW3R312NRFA | |
| Descripción | DC/DC Power Modules | |
| Fabricantes | Delta Electronics | |
| Logotipo |  |
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FEATURES
High efficiency: 85.3% @ 1.2V/13A, 3.3V/8A
Low profile: 0.33”
Industry standard footprint and pinout
Flexible current allocation on each output
Low voltage output (O/P 1) starts up first
Fixed frequency operation
Input UVLO, Output OCP, OVP, OTP
No minimum load required
Basic insulation
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.
Delphi Series Q48DW, 45W Quarter Brick,www.DataSheet4U.com
Dual Output DC/DC Power Modules:
1.2V/13A and 3.3V/8A
The Delphi Series Q48DW Quarter Brick, 48V input, dual output,
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 dual positive regulated
outputs with a flexible combination of output current and power up to
45W in a very cost effective industry standard footprint. 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
Q48DW converters meet all safety requirements with basic insulation.
OPTIONS
Positive On/Off logic
Short pin lengths
Heatsink available for extended
operation
APPLICATIONS
Telecom/DataCom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
DATASHEET
DS_ Q48DW3R312_07202006
1 page  
ELECTRICAL CHARACTERISTICS CURVES
1.8
1.5
1.2
0.9
0.6
0.3
0
30 35 40 45 50 55 60 65 70 75
INPUT VOLTAGE(V)
Figure 9: Typical full load input characteristics at room
temperature
Figure 10: Output voltage response to step-change in load
current Iout2 (75%-50%-75% of Io, max; di/dt = 0.1A/µs) at
Iout1=0A. Load cap: 10µF, tantalum capacitor and 1µF ceramic
capacitor. Ch1=Vout2 (50mV/div), Ch2=Iout2 (5A/div), Scope
measurement should be made using a BNC cable (length shorter
than 20 inches). Position the load between 51 mm to 76 mm (2
inches to 3 inches) from the module.
Figure 11: Output voltage response to step-change in load
current Iout1 (75%-50%-75% of Io, max; di/dt = 0.1A/µs) at
Iout2=0. Load cap: 10µF, tantalum capacitor and 1µF
ceramic capacitor. Ch1=Vout1 (50mV/div), Ch2=Iout1
(5A/div),Scope measurement should be made using a BNC
cable (length shorter than 20 inches). Position the load
between 51 mm to 76 mm (2 inches to 3 inches) from the
module.
Figure 12: Output voltage response to step-change in load
current Iout2 and Iout1 (75%-50%-75% of Io, max; di/dt =
0.1A/µs). Load cap: 10µF, tantalum capacitor and 1µF ceramic
capacitor. Ch1=Vout1 (50mV/div), Ch2=Iout1 (10A/div),
Ch3=Vout2 (100mV/div), Ch4=Iout2 (10A/div) Scope
measurement should be made using a BNC cable (length shorter
than 20 inches). Position the load between 51 mm to 76 mm (2
inches to 3 inches) from the module.
DS_Q48DW3R312_07202006
5
5 Page 
FEATURES DESCRIPTIONS (CON.)
Figure 25: Circuit configuration for trim-down (decrease
output voltage)
If the external resistor is connected between the TRIM
and RTN, the output voltage (Vout1) set point decreases
(Fig.25). Refer to the table below for the external resistor
values.
Trim Resistor
(Vout Increase)
Vout1
1.2
Rtrim-up [KΩ]
Open
1.32 14.4
Trim Resistor
(Vout Decrease)
Vout1 Rtrim-down [KΩ]
1.2 Open
1.08 18.7
To trim up, connect trim resistor (Rtrim-up) from trim pin to
Vout1(+) (1.2v). The trim equation is
Rtrim-up = [Vo / (0.538Vo - 0.648)] - 6.81
Unit: K
Example: If the 1.2V output is trimmed up to +1.3V, connect
the Rtrim-up from trim pin to Vout1(+). The value of the
Rtrim-up is:
Rtrim-up = [1.3/ (0.538*1.3-0.648)]-6.81= 25.29-6.81= 18.5K
To trim down, connect trim resistor (Rtrim-down) from trim pin
to RTN (power ground). The trim equation is
Rtrim-down = [Vo / (0.362-0.296Vo)]-6.81
Unit: K
Example: If the 1.2V is trimmed down to 1.1V, connect the
Rtrim-down from trim pin to RTN (Power ground). The value
of Rtrim-down is:
Rtrim-down = [1.1/(0.362-0.296*1.1)]-6.81=30.22-6.81= 23.4K
When using the trim function and the output voltage of
the module is increased, this will increase the power
output of the module with the same output current. Care
should be taken to ensure that the maximum output
power of the module remains at or below the maximum
rated power.
DS_Q48DW3R312_07202006
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet Q48DW3R312NRFA.PDF ] | |
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