Electronics Protection - Spring 2015 - (Page 24)

Power Bourns Expands High Voltage Power TVS Product Line with Nine New Devices Bourns, Inc. has expanded the company's high voltage Power Transient Voltage Suppressor (PTVS) product line. Offering added bidirectional port protection from 170 volts to 430 volts, the nine PTVS devices are designed to meet stringent IEC 61000-4-5 8/20 μs current surge requirements in a broad variety of AC line and high-power DC clamping applications. An advantage for customers is that PTVS silicon-based technology delivers lower clamping voltage under surge, greater performance stability and increased reliability compared to the capabilities offered from typical competing MOV technology. The Bourns PTVS products also offer an additional surge response versus temperature; the typical maximum surge current at 150°C exceeds 70 percent of their rated value at 25°C. Alpha and Omega Semiconductor's AlphaDFN Family Enhances Mobile Battery Protection Alpha and Omega Semiconductor Limited (AOS) has released two MOSFETs optimized for battery protection applications. The AOC2804 and AOC2806 are the latest additions to the AlphaDFN package portfolio. These devices are specifically targeting one and two cells portable battery pack applications such as those found in the latest smart phones, tablets, media players and wearable devices. In mobile battery pack applications the protection MOSFET controls charging and discharging of the battery, and is critical to battery life and battery safety. The new generation of devices is optimized with AOS's proprietary power trench technology, which minimizes RSS (source- to-source resistance) in a common-drain MOSFET configuration. The AOC2804 (1.5 mm by 1.5 mm) is aimed at 22 m max RSS level applications such as feature phones and wearable devices. AOC2806, with slightly larger dimension at 1.7 mm by 1.7 mm, is a 18 m max RSS device that is best-suited for smart phones. In addition to the silicon technology, the AOC2804 and AOC2806 feature AOS's proprietary AlphaDFN packaging technology encapsulating silicon in a protective molding compound. The resulting product still provides an ultra-thin 0.3 mm solution, while providing a more robust structure to solve die chipping and placement issues associated with standard CSP products. GE Adds to Extensive Line of Hammerhead Power Converters GE's Critical Power business has expanded its Hammerhead series of DC-DC modules with its 228 W quarter-brick QHHD019A0B isolated DC-DC converters. The low-height modules provide a single, precisely regulated output voltage over an ultra-wide input voltage range of 18 to 75 volts DC. These energy and space-efficient DC-DC converters enable input power flexibility for board designers while providing a common building block that can support multiple sockets. In terms of output voltage, GE's Hammerhead converters provide a nominal 24 Spring 2015 * www.ElectronicsProtectionMagazine.com 12-volt output voltage that is rated for 19 amps output current. The modules achieve typical full-load efficiencies of greater than 93 percent at input voltages of 24 volts and 48 volts. Standard features of GE's QHHD019A0B DC-DC converters include remote on/off, remote sense, output-voltage adjustment and over-voltage, over-current and over-temperature protection. In addition, an optional heat plate is available, which allows for an external, standard, quarter-brick heat sink attachment. With the addition of the 228-W QHHD DC-DC converters to its family of Hammerhead products, GE is able to provide board designers with a wide range of offerings from 15 W in a 1 by 1-inch module to 228 W in a DOSA-standard, quarter brick unit. New Ultra-Small Fuse and Fuseholder Combination from Schurter Schurter has expanded its range of surface mount fuses with the introduction of the UMK 250 series. The UMK 250 is a quick-action fuse according to IEC 601274, and complements the existing time-lag series UMZ 250. The UMK 250 provides primary and secondary overcurrent and short-circuit protection. The UMK 250 is available in ten rated currents from 500 mA to 4 A. This fuse and clip combination is designed for easy fuse replacement. Rated for the protection of primary and secondary PCB circuits, the UMK 250 is designed for applications including lighting, power supplies, medical equipment, as well as consumer and industrial devices. This series is RoHS compliant and compatible with lead-free soldering processes. The UMK 250 fuseholder is a substitute for similar surface mount fuses, where the fuse clips are not offered. The compatibility of the solder pads allows the Schurter product to be used in cases where the ability to replace the fuse is desired. The installed fuse-link UMF 250 is considered a Universal Modular Fuse (UMF) and carries VDE and cURus approvals. This ultra-small fuse including clip is 11.3 by 4.2 by 4.0 mm with a breaking capacity between 100 to 200 A at 250 VAC/125 VDC. Emerson Network Power Introduces Liebert eXM UPS Emerson Network Power has introduced the Liebert eXM UPS system for small and medium power requirements. The 3-phase UPS will be available in North America (including Canada), Central America and Latin America in March in eight fixed capacities from 10 to 100 kVA/kW, in 208 V and 220 V. The Energy Star qualified Liebert UPS delivers among the highest efficiency levels for midsize power applications. During double conversion mode, the transformer-free Liebert eXM UPS delivers 95.4 percent efficiency. While in energy saving Eco-Mode, efficiency increases up to 98 percent. Customer savings of more than $1,000 annually can be achieved for every efficiency percentage point gained per 100 kW. In addition, the unity power factor design delivers the highest level of power capacity, reducing cabling and installation costs and saving more than 30 percent in floor space over comparable configured systems. Optimized ancillaries add significant flexibility to meet dynamic IT environments. These include matching battery cabinets http://www.ElectronicsProtectionMagazine.com

Table of Contents for the Digital Edition of Electronics Protection - Spring 2015

Editor's Choice
Predictive Modeling: The Next Frontier in Data Center Condition Maintenance
Don't Forget the Batteries
Military Aircraft Power
Pumped Two Phase Cooling Solutions for Challenging Thermal Management Applications
Identifying the Ideal Mechanical PCB Hardware for Electronic Systems
Bridging the Technology Gap: The Importance of Cyber and Physical Security within the Data Center
Waterproof Mobile Device Protection without Compromising Acoustic Quality
Industry News

Electronics Protection - Spring 2015