Product category:
DC/DC Convertors
News Release from: Emerson Network Power - Embedded Power | Subject: Typhoon IBCs
Edited by the Electronicstalk Editorial
Team on 10 December 2003
Intermediate bus convertors power
downstream loads
Two new series of application-optimised intermediate bus convertors (IBCs) bring Artesyn Technologies into a new and emerging segment of the distributed power market.
Two new series of application-optimised intermediate bus convertors (IBCs) bring Artesyn Technologies into a new and emerging segment of the distributed power market This new class of isolated DC/DC convertor brings radically new levels of economy to distributed power applications, enabling designers to replace conventional brick convertors with loosely regulated, lower cost power sources
This article was originally published on Electronicstalk on 4 Feb 2000 at 8.00am (UK)
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Designed primarily for powering multiple downstream nonisolated point-of-load convertors, Artesyn's Typhoon IBCs are offered in two versions to address both telecomms and computing input voltage standards.
Compared with conventional bricks, these IBCs typically enable power densities to be tripled and costs halved - to levels of less than US $0.25 per watt.
For telecomms and central office applications operating from 48V battery plants, Artesyn has introduced a wide-input IBC capable of operating from any voltage in the range 36 to 75V.
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Implemented on a quarter-brick form factor, this 175W IBC generates a 12V intermediate bus voltage and can deliver up to 14A output current with a conversion efficiency of 94%.
It employs an open-frame, single board construction and operates over a -40 to +100C temperature range, without the need for a heatsink.
For easy design-in or retrofit, the convertor combines an industry-standard quarter-brick pinout with a very low installed height of just 9mm - suiting even the most demanding card pitches in common use today.
The wide-input IBC uses minimum feedback DC/DC conversion to achieve up to 94% efficiency rating while producing +/-10% output regulation for all line, load and temperature conditions when operating across the specified 36-75V input range.
Output noise and ripple are held to within 150mV, and transient load changes up to 0.1A/us are accommodated with less than 100mV deviation in output voltage.
The second series of IBCs being launched by Artesyn comprises two models, optimised for use in cost-sensitive equipment applications such as servers and storage peripherals.
Known as narrow-input IBCs, they are designed to run from a 48V +/-10% input and have an operating temperature range of 0 to +80C.
The less rigorous operational parameters of the controlled enterprise environment enable these narrow-input IBCs to provide even higher efficiencies and performance.
Artesyn has chosen to introduce two products to optimise performance and cost: one is rated at 20A, 240W output while generating an isolated 12V intermediate bus voltage, and the other provides 25A, 300W.
Artesyn's narrow-input IBCs are capable of achieving up to 96% power conversion efficiencies; they employ open loop regulation, holding output noise and ripple to 150mV.
The narrow-input IBCs can be connected in parallel and will share current to within 10% at full output, without the need for any additional circuitry.
They are available now in the industry standard quarter-brick through-hole package, with future options to include standard surface-mount, through-hole vertical and surface-mount solder ball packaging.
All Typhoon IBCs feature remote on/off, and are comprehensively protected against input undervoltage, output overvoltage and overcurrent, and overtemperature conditions; the convertors will automatically restart after removal of the fault.
They carry a full set of international safety approvals, including EN60950 (TUV Product Service) and UL/cUL60950.
Intermediate bus convertors are designed specifically to overcome many of the board-level power distribution issues being raised by the increased current demands of today's high-functionality silicon.
Increasing the output power density of conventional bricks is not easily accomplished, and simply using multiple bricks on a card provides no cost reduction opportunities, so neither approach represents an economically viable solution for delivering more power to the card.
The intermediate voltage bus generated by an IBC is used to power highly efficient downstream nonisolated point-of-load convertors.
By dispensing with much of the output regulation circuitry, IBCs are significantly less expensive than conventional brick convertors, and can yield a cost per watt figure less than one half that of a brick.
Artesyn believes the adoption of IBCs is set to grow very rapidly - hundreds of percent per annum in the short term - especially in higher power applications.
As Todd Hendrix, VP of Worldwide Marketing for Artesyn, points out: "While the use of IBCs is just beginning, their widespread adoption is beginning to accelerate for higher power designs such as optical networks, routers, servers and storage switches".
Sample quantities of Artesyn's Typhoon IBCs are available for immediate delivery.
In OEM quantities of 1000, unit prices are US $53.99 for the 14A wide-input and 20A narrow-input IBCs, and US $59.39 for the 25A narrow-input IBC.
Standard lead time on all three products is stock to 8 weeks.
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