New Demo Board Eases Accurate LED Driving

New Demo Board Eases Accurate LED Driving

The new pre-regulator module (PRM™) demonstration board, from V.I. Chip, delivers constant-current accuracy of 99.7% for lower power consumption LED-driving applications. A standalone PRM provides adjustable non-isolated currents up to 240W (5A at 48V). When combined with a voltage transformation module (VTM™), the PRM produces isolated currents up to 100A using less than 1 W per 1000 Lumens generated. The constant-current PRM™ demonstration board provides precisely-regulated currents for direct-drive multi-LED applications which control LED intensity and brightness by current regulation. The board can be used as a standalone module to provide an adjustable non-isolated current...

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Major New Range of 72V DC-DC Converters

Major New Range of 72V DC-DC Converters

Vicor has just launched a major new range of 72V input DC-DC converters for rail and transport applications. Joining their proven 110V modules, the new range introduces the rail industry’s widest choice of DC-DC converters. The new 72V input range features 27 DC-DC converters covering nine standard output voltages over three standard package sizes and three pin options. Power outputs range from 75W up to 400W. The modules meet EN50155 requirements for operating voltage, shock, vibration and temperature, whilst the product platform simplifies thermal management with three proven baseplate designs. The range covers five...

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MAXI MIL-COTS DC-DC Converters

MAXI MIL-COTS DC-DC Converters

A new family of MAXI MIL-COTS DC-DC converters allows designers to specify one converter for 12V and 24V vehicle battery systems. The 28V DC-DC Maxi converters feature a wide input range of 10V to 36V with eight different output voltage options and maximum power of 200W. Full encapsulation, using Vicor’s proprietary spin-fill process, ensures void-free encapsulation which protects the modules even in harsh environmental conditions.

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Droop-Sharing in a Compact Satellite Up-Link

Droop-Sharing in a Compact Satellite Up-Link

Droop-sharing is often the easiest and most reliable method of producing a redundant bus onto a backplane of a rack-based system. The method not only eliminates the need for a complex and vulnerable communications bus between PSUs, but also allows the backplane bus voltage to be further stepped-down to lower voltages to remove the need for absolute and precise regulation. These advantages, in conjunction with Vicor VI DC-DC converters, are being used in a compact satellite up-link, capable of fitting into a 3U rack. The up-link required a distributed bus of +7.2V at 12A...

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New VI BRICK™ Advanced DC-DC Power Platform

New VI BRICK™ Advanced DC-DC Power Platform

By integrating V•I Chip™ technology into traditional brick packages, the new VI BRICK™ modular DC-DC power platform delivers significantly increased power capability and design flexibility. The family’s robust, low-profile brick packages facilitate both thermal management and through-hole assembly. The 45 modules within the VI BRICK™ family are optimised for a range of DC-DC configurations: Intermediate Bus Architecture or point-of-load (POL) designs that require multiple output voltages; flexible DC-DC regulation and transformation using Factorized Power™; and 48V DC-DC conversion using advanced Sine Amplitude Converter™ technology. With a fast transient response, VI BRICK™ modules also minimise...

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EMI Filters Used in Military Vehicle Radios

EMI Filters Used in Military Vehicle Radios

The reliability and compact packages of Vicor Picor modules were key considerations for a Vicor customer in Turkey. The Picor modules are being used to achieve low EMI by reducing switching noise at the converter input, and to reduce the ripple currents at the output of the converter, in multi-band, multi-mode radios designed for use in tactical military vehicles. The QPI family of active EMI filters provides conducted common-mode (CM) and differential-mode (DM) attenuation from 150 kHz to 30 MHz in the CISPR22 range. The proprietary active filtering circuit provides superior attenuation at low...

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V•I Chips Solve a Noise Problem

V•I Chips Solve a Noise Problem

A small company located in the northeastern US specializing in rapid prototyping of harsh environment instrumentation and ocean-acoustic research was developing a sonar system designed to detect intruders in a particular area, eg for harbor defence. The new sonar system was being designed to transmit and receive signals that can then be interpreted to identify what has been detected, such as a swimmer or a small underwater vehicle. Vicor initially provided Micro modules for the prototype system, but the sonar system transmits a signal and waits to receive a reflected signal in response. During...

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