Product category:
AC/DC Power Supplies
News Release from: Excelsys Technologies | Subject: 3gen LN series power supplies
Edited by the Electronicstalk Editorial
Team on 26 December 2000
Low-noise switchers use advanced filter
technology
Excelsys Technologies has launched a range of innovative switch-mode AC/DC power supplies featuring exceptionally low noise outputs.
Excelsys Technologies has launched a range of innovative switch-mode AC/DC power supplies featuring exceptionally low noise outputs The new 3gen LN series power supplies employ state-of-the-art magnetic amplifier technology and an innovative active noise attenuation circuit to provide the type of low noise performance traditionally associated with linear supplies, combined with the high conversion efficiencies, low weight and small physical dimensions of latest-generation switch-mode designs
This article was originally published on Electronicstalk on 5 Dec 2000 at 8.00am (UK)
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High-current PSU adjusts down to 1.45V output
Excelsys Technologies has launched a high current output module for its 3gen series of configurable AC/DC power supplies featuring an adjustable output voltage which can go as low as 1.45V DC.
Available with 400, 600 or 1000W power output capabilities, the 3gen LN series offers users a choice of one, two or three isolated outputs, each of which can be configured from any of four output modules, spanning voltages from 3 to 27V.
All models in the series offer conversion efficiencies of around 75%, and meet the EN61000-3-2 standard for harmonic current content, due to take effect in 2001.
The 3gen LN series is based on a completely modular design concept.
Further reading
Modular supplies boast top power density
A new generation of modular AC/DC power supplies is believed to be the highest-efficiency and highest-power-density configurable products in the world.
Kit configures prototype power supplies
Available now from Excelsys Technologies, the specialist in configurable power supplies, powerKit is a simple-to-use 1U modular power supply development kit.
Modular power supply has high power density
1U high modular power supply delivers a power density of 15W/from a chassis measuring 260 x 127mm.
A two-transistor forward convertor front-end drives a planar magnetic main transformer, which then couples to a high frequency magnetic amplifier in each of the modular output stages.
This approach enables the power supplies to be cost-effectively configured for an extremely wide range of applications.
There are four single-output modules to choose from, with nominal outputs of 5V/30A, 12V/20A, 18V/15A and 24V/12A.
The output voltage of each module can be adjusted over a wide range via a multi-turn potentiometer; for example, the 5V module can be adjusted from 3 to 5.5V, and the 24V module can be adjusted from 12 to 27V.
Each output module also incorporates a specially-developed magnetic amplifier with an active noise attenuation circuit, which enables it to emulate the low noise performance of a linear supply; the 5V module, for example, exhibits a noise level of just 1mV peak-to-peak, or 100uV rms.
Excelsys 3gen LN series power supplies are particularly suitable for use in noise-critical applications such as analytical instrumentation and high-specification measurement and audio/broadcast equipment, and are also an ideal replacement for linear power supplies.
All 3gen LN series power output modules provide a single fully floating output, and have zero minimum load requirements, making them exceptionally easy to integrate.
Line regulation is typically held to within ñ0.1%, and load regulation is typically ñ1.0% for a 75% change in load demand.
The modules can be connected in series or parallel to increase output voltage or current capacity, and feature comprehensive protection against over-voltage, over-current and over-temperature conditions.
The power supplies offer a choice of three input modules, to provide a total capacity of 400, 600 or 1000W.
Each of these modules features a universal input that accommodates any voltage within the range 88 to 264VA (at 47 to 63Hz) or 150 to 370V DC.
The power supply will continue to hold up for a minimum of 20ms after the loss of AC power, and a mains failure detect function is available as an option.
There are two versions of 3gen LN series containment housings: a 4-slot unit which can house an input module and one or two power output modules, and a 6-slot unit which accommodates the input module and up to three power output modules.
The 4-slot unit measures 127 x 270 x 65mm (W x D x H) and the 6-slot unit measures 187 x 270 x 65mm.
Both units are fitted with integral cooling fans with a 34bB(A) rating (the 6-slot unit has two fans) and employ high quality screw terminals for all power connections.
All Excelsys 3gen LN series power supplies have a 3000VAC input/output isolation rating and carry a full set of international safety approvals, including EN60950 and UL1950.
The supplies also meet the rigorous EN55022 Level B requirements for conducted emissions, and comply with the relevant parts of EN61000-4-x for immunity to electrostatic discharge, electromagnetic fields, fast transients, line surges and voltage dips.
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