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PDF ( 数据手册 , 数据表 ) E48SR3R320

零件编号 E48SR3R320
描述 Eighth Brick Bus Converter DC/DC Power Modules
制造商 Delta Electronics
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E48SR3R320 数据手册, 描述, 功能
Delphi Series E48SR, 66W Eighth Brick Family
DC/DC Power Modules: 48V in, 3.3V/20A outwww.DataSheet4U.com
The Delphi Series E48SR Eighth Brick, 48V input, single output,
isolated DC/DC converters are the latest offering from a world leader in
power systems technology and manufacturing – Delta Electronics, Inc.
This product family is available in a surface mount or through-hole
package and provides up to 66 watts of power or 25A of output current
(1.8V and below) in an industry standard footprint. With creative design
technology and optimization of component placement, these converters
possess outstanding electrical and thermal performances, 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. The E48SR Eighth Brick
shares the same pin out as the Delphi Series Quarter Brick family. The
smaller footprint of the Eighth Brick modules allows the user to save
board space for power requirements up to 66W.
FEATURES
High efficiency: 90.5% @ 3.3V/20A
Size: 58.4mm x 22.8mm x 8.35mm
(2.30”x0.90”x0.33”)
Industry standard pin out
SMT and through-hole versions
Fixed frequency operation: 350KHz
Input UVLO, Output OCP, OVP, OTP
1500V isolation
Basic insulation
No minimum load required
2:1 Input voltage range
ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS 18001 certified manufacturing
facility
UL/cUL 60950 (US & Canada) recognized,
TUV (EN60950) certified
CE mark meets 73/23/EEC and 93/68/EEC
directives
OPTIONS
SMT or through-hole versions
Positive On/Off logic
Short pin lengths
APPLICATIONS
Telecom/Datacom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Testing Equipment
DATASHEET
DS_E48SR3R320_02272007







E48SR3R320 pdf, 数据表
DESIGN CONSIDERATIONS
Input Source Impedance
The impedance of the input source connecting to the
DC/DC power modules will interact with the modules and
affect the stability. A low ac-impedance input source is
recommended. If the source inductance is more than a
few µH, we advise adding a 10 to 100 µF electrolytic
capacitor (ESR < 0.7 at 100 kHz) mounted close to the
input of the module to improve the stability.
Layout and EMC Considerations
Delta’s DC/DC power modules are designed to operate in
a wide variety of systems and applications. For design
assistance with EMC compliance and related PWB layout
issues, please contact Delta’s technical support team. An
external input filter module is available for easier EMC
compliance design. Application notes to assist
designers in addressing these issues are pending
release.
Safety Considerations
The power module must be installed in compliance with
the spacing and separation requirements of the
end-user’s safety agency standard, i.e., UL60950,
CAN/CSA-C22.2 No. 60950-00 and EN60950: 2000 and
IEC60950-1999, if the system in which the power module
is to be used must meet safety agency requirements.
Basic insulation based on 75 Vdc input is provided
between the input and output of the module for the
purpose of applying insulation requirements when the
input to this DC-to-DC converter is identified as TNV-2 or
SELV. An additional evaluation is needed if the source
is other than TNV-2 or SELV.
When the input source is SELV circuit, the power module
meets SELV (safety extra-low voltage) requirements. If the
input source is a hazardous voltage which is greater than
60 Vdc and less than or equal to 75 Vdc, for the module’s
output to meet SELV requirements, all of the following
must be met:
The input source must be insulated from the ac
mains by reinforced or double insulation.
The input terminals of the module are not operator
accessible.
If the metal baseplate is grounded, one Vi pin and
one Vo pin shall also be grounded.
A SELV reliability test is conducted on the system
where the module is used, in combination with the
module, to ensure that under a single fault,
hazardous voltage does not appear at the module’s
output.
When installed into a Class II equipment (without
grounding), spacing consideration should be given to
the end-use installation, as the spacing between the
module and mounting surface have not been evaluated.
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
This power module is not internally fused. To achieve
optimum safety and system protection, an input line fuse
is highly recommended. The safety agencies require a
normal-blow fuse with 5A maximum rating to be installed
in the ungrounded lead. A lower rated fuse can be used
based on the maximum inrush transient energy and
maximum input current.
Soldering and Cleaning Considerations
Post solder cleaning is usually the final board assembly
process before the board or system undergoes electrical
testing. Inadequate cleaning and/or drying may lower the
reliability of a power module and severely affect the
finished circuit board assembly test. Adequate cleaning
and/or drying is especially important for un-encapsulated
and/or open frame type power modules. For assistance
on appropriate soldering and cleaning procedures,
please contact Delta’s technical support team.
DS_E48SR3R320_01052007
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