Networks Europe Jul-Aug 2020 | Page 15

NEWS IN BRIEF 15 Microchip introduces 3kW transient voltage suppressor diode array family for circuit protection in harsh environments To ensure critical operations, aviation and space systems rely on digital and logic functionality and circuitry in engine control units, environmental controls, instruments and actuators. Data centres, the 5G infrastructure and communication systems also rely on complex circuitry requiring protection. Each system must operate continuously despite voltage surges and spikes from lightning, solar events and electromagnetic incidents. Microchip Technology Inc. has announced its newly-expanded portfolio of Transient Voltage Suppressor (TVS) vertical arrays – the MDA3KP Transient Voltage Suppressor (TVS), a 3kW diode family of more than 25 products with different screening levels, polarities and qualification standards. Microchip’s MDA3KP TVS diode array family – the only available technology offering a comprehensive voltage range tested to a high reliability standard and qualified based on the MIL-PRF-19500 JANTX level equivalence standard – provides an integrated multi-diode solution. These voltage-clamping devices provide fast-reacting Avalanche Breakdown Diode (ABD) features that divert excess current around sensitive components to protect them from electrical overstress. “Digital controls, logic and diagnostic system circuit blocks require highly reliable, secure current and power protection to ensure operations in extreme environments,” said Leon Gross, vice president of Microchip’s Discrete Product Group business unit. “This diode family also addresses the challenges system designers face with a more efficient vertical construction and requirement for less board space than other devices.” MDA3KP TVS diode arrays are available in the following screened version industry standards: M, MA, MXL and MX. The devices have been exposed to various levels of testing to ensure they meet the aircraft lightning protection requirements set forth in the standard for environmental testing of avionics, RTCA DO-160E (Lightening Induced Transient Susceptibility). RTCA (American Radio Technical Commission for Aeronautics) is the industry consortium that develops consensus on critical aviation modernisation issues. The MDA3KP TVS diode array, a vertically constructed 8-diode, 16-pin surface mount package, allows for efficient layout and ease of design, as less printed circuit board space is required while enabling higher power densities. In the MDA3KP TVS diode array family, each device’s vertical construction provides the power of eight smaller devices on a printed circuit board, eliminating the need for the multiple devices even as it provides higher power. Available in unidirectional and bidirectional construction in standoff voltages of 6V to 40V, the components provide Electrostatic Discharge (ESD) and Electrical Fast Transients (EFT) protection according IEC standards and a Peak Pulse Power rating of 3000 W at 10/1000 µs. With an extended temperature range from -55°C to +150°C, the devices are lot traceable, surge tested, and Moisture Sensitivity Level (MSL) Level 1 – for use in harsh environments. The MDA3KP TVS diode array family’s power rating is the industry’s only available technology with this level of screening. n Comfort cooling unit reimagined with integrated heating feature A UK-based air conditioning manufacturer has showcased the ingenuity of its R&D team by developing a new dual-function version of its pioneering hybrid fan coil unit to meet evolving industry demands. Airedale International has launched the latest generation of the award-winning Artus range, now with a four-pipe integrated heating and cooling option for commercial and residential spaces. The original, single coil Artus first appeared on the market two years ago and has since found success in landmark commercial projects such as the WeWork flexible office space at 10 Devonshire Square in central London. Building on the success of the original unique design, Airedale International tasked its team of R&D specialists to develop a solution which met the requirements of an industry increasingly focussed on energy efficiency and individual wellbeing. Artus was originally invented to solve some of the issues associated with inefficient and cumbersome comfort cooling systems and features low space claim, consistent air distribution and best-in-class energy consumption. Working in partnership with design consultants, Arup, a hybrid system was developed, taking the performance of a traditional fan coil unit coupled with a 60% reduction in energy usage compared with chilled beam. The result is a unit that requires no secondary ducting or hatch access, with a four-pipe water system that allows heating as well as cooling with no mixing of water streams, increasing efficiency and performance. It offers a solution to consultants and architects who can more easily specify chilled water systems, in preference to direct expansion units, in the face of ongoing refrigerant phase downs. Antony Cole, managing director of Airedale International, explains: “The original Artus model has been particularly well received by specifiers prioritising performance, efficiency and ease of install on their projects and where ceiling height is at a premium. Its shallow depth of around 200mm, allows a 12-storey building to become 13-storeys with the savings in required ceiling void space. “We’re constantly innovating and looking for new and improved designs to stay on top of our game. Artus is a brilliant example of taking a great product which was more compact, more effective and more energy efficient and making it even better.” The two coil Artus suits buildings with a shell and core system with four pipe terminal units. The fascia can function with any hole configuration for flexibility of design and seamless integration with its surroundings. Roger Olsen of Arup, who devised the Artus’ latest design concept, adds: “Comfort and well-being were priorities during the design process. Noise levels can be precisely controlled, and with whisper quiet (NR25) levels possible, we are receiving interest for premium residential projects. The air distribution has also been carefully engineered so there is no uncomfortable air movement in the occupied space.” Airedale International designs and manufactures innovative and high-efficiency cooling solutions from its headquarters in Leeds. It provides solutions for industries including healthcare, commercial education, hospitality and data centres. n www.networkseuropemagazine.com