• • • SURGE & CIRCUIT PROTECTION • • •


PROTECTING AEROSPACE SYSTEMS FROM SURGES AND SPIKES


Microchip offers 3kW transient voltage suppressor to protect aircraft, space systems and critical infrastructure from surges, spikes and electrostatic events


environmental controls, instruments and actuators. Data centers, 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. announced its newly-expanded portfolio of


T


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,” says Leon Gross, vice


o ensure critical operations, aviation and space systems rely on digital and logic functionality and circuitry in engine control units,


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 (the American Radio Technical Commission for Aeronautics) is the industry consortium that develops consensus on critical aviation modernization 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


32 ELECTRICAL ENGINEERING • NOVEMBER 2020


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 – demonstrating that these devices are ready for use in harsh environments. MSL indicates that no dry pack or bake is required prior to use. The MDA3KP TVS diode array family’s power rating is the industry’s only available technology with this level of screening in this package. Microchip’s 3kW MDA diode family provides


military system circuit protection for ruggedized handheld radios, the Global Positioning System (GPS), and communication test equipment. Other device applications include automotive, industrial logging equipment, power supplies and marine systems. Microchip Technology Inc. is a provider of smart,


connected and secure embedded control solutions. Its easy-to-use development tools and comprehensive product portfolio enable customers to create optimal designs which reduce risk while lowering total system cost and time to market. The company’s solutions serve more than 120,000 customers across the industrial, automotive, consumer, aerospace and defense, communications and computing markets.


MICROCHIP microchip.com


electricalengineeringmagazine.co.uk


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