For use in space power systems, more than 50 dc/dc converter modules grouped into four families deliver up to 120W of output power and operate reliably in harsh radiation environments. Reportedly, they are the first dc/dc converters with a guaranteed radiation tolerance through long-term exposure to low dose radiation. Features of the SVSA, SVHF, SVTR, and SVFL product families include 6W to 120W of output power, single and dual outputs, characterization and guarantee to 30 krads (Si) per the company’s RHA plan specified per MIL-PRF-38534, Appendix G, Level P with 2x margin, and characterization, and testing for TID at HDR and LDR to the MIL-PRF-38534 Class H element evaluated components standard. The space series units are available now with pricing beginning at $950 each for the 6W SVSA Series in OEM quantities. VPT INC., Blacksburg, VA. (425) 353-3010.
Roberts Warr News & Resources
DC/DC Converters Suit Up For Space
September 2nd, 2010New -70° to +150° C POL DC-DC Converter from Crane Aerospace & Electronics, Interpoint brand
August 31st, 2010Crane Aerospace & Electronics, Interpoint brand is proud to introduce the MFP Series TM of POL converters. The first products in a new line of Point of Load converters, the MFP Series offers Maximum Flexibility through its rich feature set and is designed to produce stable power across a wide temperature range of -70° to +150° C. The MFP Series delivers exceptionally low noise performance, requiring no external capacitors.
Ed Fuhr, Vice President of Power Solutions for Crane Aerospace and Electronics, states “This new addition to the Interpoint product line provides a simple solution that is easy to integrate into today’s demanding low voltage high current designs. We are truly excited about the strength and flexibility the MFP Series Point of Load converters bring to the marketplace.”
The highly efficient MFP Series is the first of our new smaller, quieter, robust products coming to the market. Four preset output voltages of 0.8, 1.6, 2.5, and 3.3 can be configured with no trim resistors required. Trim resistors can be used to achieve voltages over the full range of 0.8 to 3.4 volts.
The MFP Series converters are rich with features, including input synchronization from 300 to 600 kHz to sync to the system or other MFPs, output current monitor, output remote sense, output short circuit protection, and input inrush current limiting. With an input voltage range of 3.0 to 6.0 volts, the converters can handle up to a 15 volt transient for a full second in addition to full input over-voltage protection. The converters support input voltages as low as three volts with no external supply. The MFP Series converters will be available to the general market in the full range of screening options. For more information, download the technical preview at www.interpoint.com/019.
Crane Electronics Group, Power Solutions, offers Interpoint brand DC/DC converters and EMI filters with proven performance in extreme environments where high reliability is required and failure is not an option. Crane Electronics Group is a major supplier of systems and components for critical aerospace, space, and defense applications. Product and service offerings are organized in solution sets and include Power Solutions, Microwave Systems Solutions, and Microelectronics Solutions. Products are manufactured under the brand names ELDEC, Interpoint, and Signal Technology. For more information on Crane Electronics, visit www.craneae.com and for Crane Co., visit www.craneco.com.
Crane Co. is a diversified manufacturer of highly engineered industrial products. Crane Co. is traded on the New York Stock Exchange (NYSE: CR).
Lightweight Brake Disc for Vehicle Manufacturers
August 26th, 2010SAF-Holland, a supplier of parts for commercial vehicles, has developed a lightweight disc brake for semi-trailers and trailers in co-operation with brake manufacturer Haldex.
The weight reduction per axle is 12kg or 36kg for a trailer with a tri-axle suspension.
The SAF SBS 2220 has been designed for brake torques of up to 20kNm and disc brake rotors with a diameter of 430mm.
This makes it suitable for both semitrailers and trailers with axle loads up to nine metric tonnes combined with 22.5in tyres.
Olaf Drewes, director – research and development axles and brakes at SAF-Holland, said the key benefit compared with conventional disc brakes is a significant reduction in weight without compromising performance.
Ericsson’s Ground Breaking Digital DC/DC Converter Goes Surface Mount To Save Board Space
August 23rd, 2010- Industry first high efficiency digitally controlled DC/DC converter compliant to full surface-mount manufacturing processes
- Floating Inserted Pins guarantee high co-planarity and robustness
- High efficiency and digital control reduce power consumption
Based on the company’s ground breaking BMR453 DC/DC converter, Ericsson Power Modules’ BMR453 SI version adds the company’s innovative Floating Inserted Pins (FIP) technology to offer a surface mount version that enables higher density boards to be designed and used.
Introduced in June 2008, Ericsson’s ‘industry first’, digitally controlled, PMBus compliant BMR453 DC/DC converter brought a new dimension to the way system designers considered power management and how to optimize the energy delivered to core processors or to a single sub-function at a very low board-level.
IEEE Approves 40/100-Gbit/s Ethernet Standard
August 19th, 2010After about four years of work, the IEEE 802.3ba Task Force has ratified the 802.3ba Ethernet standard. It covers communications with Ethernet at 40 and 100 Gbits/s across backplanes, copper cabling, multi-mode fiber (MMF), and single-mode fiber (SMF), moving our networking speeds forward by another order of magnitude.
Each Ethernet standard has incremented the data speed by another decade, in this case to an amazing 100 Gbits/s. But unique to 802.3ba is a 40-Gbit/s option that fits many existing applications. It’s a welcome addition to Ethernet, as it continues to scale with the need. Originally a local-area networking (LAN) technology, Ethernet has gone far beyond its roots thanks to a continuous standards effort. The new standard paves the way for the next generation of high-rate server connectivity and core switching.
Compact 650W AC/DC Power Supply for Medical or Industrial Applications
August 16th, 2010XP Power today announced the introduction of the SHP650 and MHP650 series of single output high power density fan cooled AC/DC power supplies. The MHP650 range meets the IEC60601-1 safety specification for medical equipment while the SHP650 range compiles with the IEC60950 standard for IT and industrial equipment. Both series are highly efficient, typically 86%, and have a high power density of 8.2 Watts/cubic inch.
Three mechanical mounting formats are available to provide design-in flexibility. Two fan-cooled formats provide the option of having the fan mounted internally on the top or externally mounted on the end of the unit. The integral fan speed is load dependent to aid minimizing noise. By using the U channel format designers can supply their own airflow; only 5.5 meters/second forced airflow is required. A +12 VDC, 6 W fan supply is provided when using this format.
New HEMP150G Series Green Power Adaptor
August 12th, 2010
“Save money and protect our environment for future generations!”
HiTRON ,Taiwan power supply manufacturer, has successfully developed its new HEMP150G series, a high efficiency 120-150Watt AC-DC Green Power adaptor.
HEMP150G series feature both ITE (Information Technology Equipment IEC60950-1) and Medical (IEC60601-1), bear the CE mark, conform to FCC/EN55022 Level B Conducted Emission Standard and meet the requirements for lower power consumption requirement stipulated in ENERGY STAR Level V and CEC(California Energy Commission)
Level IV.
HEMP150G have 90-264 VAC universal input range using the standard IEC320-C14, IEC320-C6 and IEC320-C8 AC receptacle and 12-24V output voltage range with PFC function which can comply with the harmonic requirement per EN61000-3-2 and also fulfill the requirements of various electronic equipments. HEMP150G series have 88-90% of high efficiency and power density of 3.53-4.38 per cubic inch. Output protection features include overvoltage,
overload and short circuit.
Precision D/A Converter Expectations
August 9th, 2010How a 1ppm d/a converter can ease precision instrumentation design problems. By Maurice Egan. Original article here on NewElectronics.co.uk.
The push to improve the precision of instrumentation systems has led to performance improvements in d/a converters beyond 16bits, a benchmark previously achieved with cumbersome, expensive and slow Kelvin-Varley dividers.
Over time, however, the definition of what constitutes a precision d/a converter has changed as markets and technologies have evolved. Advances in semiconductor processing, d/a converter design and calibration techniques are enabling highly linear d/a converters which are stable and fast settling, while delivering a 20bit performance which is better than 1ppm. These small ics have guaranteed specifications, do not require calibration and are easy to use.
Paralleling Power Supply Outputs For Redundancy
August 5th, 2010Configuring a redundant power system is not just a matter connecting two power supplies in parallel: Alex Karapetian explains why. Original article here on electronicstalk.com.
The highest reliability attainable in a single power supply is not nearly as good as that of a redundant power system, in which the outputs of two (or more) power supplies are connected so that – even if one were to fail – the other(s) would continue to provide uninterrupted power to the load.
But implementing redundancy is not as straightforward as it may appear to be.
