Product category:
Electrical systems
News Release from: Emerson Network Power - Power Conversion | Subject: Isolated 300W DC/DC Bus Converters
Edited by the Manufacturingtalk Editorial
Team on 23 December 2003
BUS converter modules offer fast
switching
BUS converter modules offer a fresh approach to high efficiency distributed power systems by using an innovative open loop DC step-down conversion design.
Astec Power Launches the ALQ25 Series; A New Range of Isolated 300W DC/DC Bus Converters in Quarter-Brick Format Designed to Drive Multiple Rail Point-of-Load Devices with up to 96% Efficiency The ALQ25B50 is an isolated 300W bus converter module delivering 12VDC at 25A Astec Power has used an innovative open loop DC step-down conversion design with a patented soft-switching push-pull topology, coupled with a very fast switching frequency of 800kHz, to ensure an especially high power efficiency of up to 96%
This article was originally published on Manufacturingtalk on 12 Mar 2007 at 8.00am (UK)
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This novel approach also means that the output exhibits purely resistive behaviour, thus improving power supply stability characteristics.
Output line regulation is 10.25 to 13.6VDC (12VDC nominal).
Input range is 42 to 53VDC (48VDC nominal).
Further reading
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Emerson Network Power has expanded its widely used Astec LP25 and LP40 switching power supply families with a new terminal block connector option.
350-Watt bulk AC-DC switching power supplies
The NTS Series line of 350-Watt bulk AC-DC switching power supplies from Astec Power include new 54V output configurations, available from Emerson Network Power.
Triple-output 50W switching power supplies
Emerson Network Power has introduced a line of compact, triple-output 50W switching power supplies from Astec Power.
The new ALQ25 series addresses two of the most pressing problems for power systems designers today.
Ever-increasing power requirements in many electronic applications has led to increased heat dissipation problems; and the reduction in working voltage levels coupled to an increase in the number of voltage rails required makes voltage rail regulation ever more difficult.
These problems can be addressed by the use of a Distributed Power Architecture (DPA) approach.
However, conventional approaches to (DPA) may suffer from an efficiency - as well as cost - penalty resulting from a 2-stage regulation process.
Astec Power have designed the ALQ25B50 to avoid this problem, by optimising the device to deliver isolated power at very high efficiency (96%) to a new generation of Point-of-Load (POL) voltage regulators, which themselves operate at around 90% efficiency.
Particularly in multiple rail applications, this approach has major benefits for cost, ease of board layout and power dissipation.
The new ALQ25B50 modules come with several useful features, including input over voltage protection and under voltage lockout with hysteresis to prevent false triggering at low input voltages, as well as output over current and over temperature protection.
The devices also offer a choice of either positive or negative logic control for the remote on/off pin.
As an added convenience, designers can select models with pin lengths of either 3.7mm or 5mm.
Designed to operate in ambient temperatures from -40degC to 85degC, the devices meet basic insulation requirements as well as industry standards for safety and performance.
These robust modules have a calculated Mean Time Between Failures (MTBF) of more than one million hours.
Text Ends About Astec Power - Astec Power is a leading international supplier of power conversion solutions.
A wholly owned subsidiary of Emerson (NYSE: EMR), Astec Power is headquartered in Carlsbad, CA.
Dedicated to advanced research and development, state of the art design, sophisticated automation and in-process testing, Astec Power produces standard, modified standard, and custom AC/DC and DC/DC power supplies, which range from one to 18,000 Watts.
In order to satisfy and continue to grow its international customer base, Astec Power has operations in three continents.
Through this strategic allocation of its manufacturing resources, Astec Power delivers competitively priced quality products worldwide in a timely and reliable manner.
About Emerson Network Power - Emerson Network Power is an Emerson business that provides a full spectrum of reliable power solutions, including inbound power, connectivity, power supplies, power systems and precision cooling, backed by the largest global services organization in the power industry.
These Emerson companies serve the needs of telecommunications networks, data centers, health care and industrial facilities worldwide.
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