Product category:
DC/DC Convertors
News Release from: Emerson Network Power - Embedded Power | Subject: E-class niPOL DC/DC convertors
Edited by the Electronicstalk Editorial
Team on 25 June 2003
Convertors pack more power into smaller
spaces
A new series of 12V-input point-of-load DC/DC convertors offers state-of-the-art performance to support leading-edge product designs.
A new series of 12V-input point-of-load DC/DC convertors offers state-of-the-art performance to support leading-edge product designs With efficiencies to 94%, power densities to 15W/cm3, and typical heights of 8.2mm, these nonisolated convertors support developers seeking to pack more functionality into smaller real estate
This article was originally published on Electronicstalk on 4 Feb 2000 at 8.00am (UK)
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The new E-class nonisolated point of load (niPOL) DC/DC convertors are available with 5, 10 or 15A outputs, and have no minimum load requirement.
Designed for use with a 12V-nominal onboard bus source - a popular standard in equipment areas including datacommunications and IT - the convertors will actually operate from an input voltage from 10 to 14V.
This wide range gives developers the means to enhance the economics of distributed power management architectures by using a purpose-designed "intermediate bus convertor", as well as the more conventional isolated brick convertor.
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The wide input voltage range additionally meets the popular Infiniband architectural specification.
At launch, the new 12V-input E-class comprises four models, offering output voltages that may be set anywhere from 0.8 to 3.63V by means of a single external resistor.
This provides wide-ranging flexibility for the low-voltage silicon levels in use today - allowing developers to upgrade product designs without PCB changes if IC voltage requirements migrate.
The 10A and 15A variants are available in horizontal surface-mounting packages measuring 33 x 13.5mm, with an above-board height of 8.2mm.
The 5A is available in a horizontal, surface-mounting package measuring 20.3 x 11.4mm, with an above-board height of 5.97mm.
The 15A version is additionally available in a single-inline form factor for through-hole mounting, with a 50.8 x 7.8mm footprint and a profile of 12.7mm.
The niPOL convertors employ a synchronous buck topology, using fixed-frequency (300 kHz) switching and ultralow-on-resistance mosfets.
This delivers very high conversion efficiencies of 94% typical, at 12V in and 3.3V out and at 15A full load current.
The convertors incorporate a number of high-end features to support leading-edge product designs, including remote sense, remote on/off, and comprehensive protection against over-temperature and short-circuit conditions.
However, users may optionally order parts without the remote sense and/or trim pin connectors, to simplify second sourcing.
Artesyn's E-class products are fabricated from surface-mount components, including the magnetics, and are designed for fully automated assembly to help keep manufacturing costs as low as possible.
An open-frame, single-board construction minimises cost and weight and simplifies thermal management.
The convertors will operate over a -40 to +85C ambient temperature range, and are expressly designed for high reliability, using conservative component de-rating criteria.
In addition the 15A variants will deliver their full 55W output at 60C under natural convection.
The new series carries a full set of international safety approvals - including EN60950 (TUV Product Service) and UL/cUL60950.
Pricing for 10,000-piece quantities starts at US $8.00 for the 5A part, at $10.45 for the 10A part, at $14.00 for the 15A part and the standard lead time is stock to 6-8 weeks.
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