Product category:
DC/DC Convertors
News Release from: Emerson Network Power - Embedded Power | Subject: Typhoon SMT15F
Edited by the Electronicstalk Editorial
Team on 27 April 2004
POL modules feature fast transient
response
A new series of 15A nonisolated point-of-load DC/DC convertor modules is claimed to set a new performance benchmark for the industry.
A new series of 15A nonisolated point-of-load DC/DC convertor modules is claimed to set a new performance benchmark for the industry Developed specifically for applications demanding exceptionally fast transient response capabilities, the new Typhoon SMT15F modules can accommodate step load changes in excess of 300A/us, which is several orders of magnitude faster than any comparable point-of-load (POL) convertor on the market
This article was originally published on Electronicstalk on 4 Feb 2000 at 8.00am (UK)
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The convertors are the latest additions to Artesyn's new F class line of POL products, all of which are designed to power advanced silicon devices that demand high currents and switch at very fast speeds, such as network and communication processors, and latest-generation high performance ASICs, FPGAs and DSPs.
A further unique advantage of SMT15F series modules is that they are completely self-contained, drop-in power solutions, requiring no additional components to achieve their unprecedented transient response performance.
Virtually all competing POL convertors have a hidden cost element, demanding a relatively large number of bulk storage capacitors and a variety of high-, mid- and low-frequency decoupling capacitors to improve dynamic performance.
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Designers using these products face increased build costs and are forced to allocate extra board space, which is invariably at a premium.
The trend towards lower silicon operating voltages is compounding the problem, as even more capacitance is needed for a given amount of energy storage.
Artesyn's SMT15F modules completely dispense with the need for extra capacitors, simplifying design-in and making them a much more cost-effective, technically superior power solution.
The SMT15F series initially comprises four models with nominal output voltages of 1.0, 1.2, 1.5 and 1.8V.
The output voltage can be trimmed by +/-10% of nominal to suit the exact needs of the load, and each convertor is capable of delivering up to 15A output current.
The convertors have a wide input voltage range of 10.8 to 13.2V, and are designed primarily for use on boards employing intermediate bus architectures (IBA).
Typically, these advanced POL convertors would be used as elements in IBA-based board designs, deriving their supply from an intermediate voltage bus produced by a conventional isolated brick convertor or low-cost intermediate bus convertor.
Designers will particularly appreciate the benefit of being able to use a single high efficiency convertor to step from voltages as high as 13V down to as low as 1.0V.
SMT15F series convertor modules use a synchronous buck regulator topology and a very high switching frequency of 1MHz to maximise conversion efficiency.
The 1.8V output model, for example, has a typical efficiency of 88%.
This results in extremely low internal power dissipation and high levels of useable power, and is exceptional for a DC/DC convertor capable of operating over such a wide input/output voltage ratio.
The SMT15F modules are based on highly integrated silicon, using novel circuit design and component layout techniques that cater for very fast load transients.
These include wide-bandwidth error amplifiers, special regulation circuits to predict load response, low inductance filters and ultra low impedance output capacitors.
The net result is that SMT15F series convertors have a very low output impedance under all load conditions and maintain tight regulation in the presence of extremely fast load transients.
The output of the 1.2V model, for example, deviates by less than 43mV for a 5A change in load current at a rate of 100A/us, with full recovery in less than 5us.
Designed for surface mounting, SMT15F POL convertor modules are exceptionally compact, having an industry-standard footprint of just 33 x 13.5mm, and an installed height of only 7.6mm.
The modules can consequently be easily colocated with the devices that they are powering - even on densely packed boards - and their low profile makes them ideal for applications that use tight interboard rack spacing to minimise system size.
They employ a single board construction to minimise cost and weight, make extensive use of surface-mount components, and are designed for fully-automated assembly to help keep manufacturing costs as low as possible.
SMT15F POL convertors feature remote sense and remote on/off facilities, have no minimum load requirement, and are comprehensively protected against overtemperature and short-circuit conditions, with automatic recovery.
They accommodate a wide operational temperature range of -40 to +85C ambient, without derating.
Artesyn's SMT15F POL convertors carry a full set of international safety approvals - including EN60950 (TUV Product Service) and UL/cUL60950.
The convertors form the latest additions to the company's rapidly growing Typhoon family of high-performance DC/DC board-mounted power conversion products.
Sample quantities of Artesyn's SMT15F POL convertors are available for immediate delivery, and production quantities will be supplied in 30-piece tray carriers.
Pricing for 1000-piece quantities is US $19.93, and the standard lead-time is stock to 8 weeks.
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