The question really comes down to a cost-benefit analysis based on the facts in your particular case. I've seen this all the time in space electronics. These parts are often available only in the “commercial” temperature range. Once the normal operating conditions are exceeded, the performance of the device may suffer.”Reliability is the ability of a part to perform within specified performance limits, for a specified period of time, under the life cycle application conditions [8]. Direct sunlight, proximity to other heat sources, poor ventilation, etc. Mitsubishi introduces a high resolution 7.0” TFT with 1000cd and wide operating temperature range for rugged applications. Part manufacturers derive AMRs on parameters as guidance for designers. "You have to decide which one of those you need to beat for the functionality of your design and to be within your cost budget." Related Articles. By using our site, you acknowledge that you have read and understand our Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. Through presentations and a panel discussion, you will gain an understanding of the pitfalls to avoid in designing a system with highlights and technical considerations for facilitating connection, disconnection, and routing of fluid through equipment to support 100% uptime.https://event.on24.com/wcc/r/2516096/242988A6CB46E0D7B55E740F8CEC3CA0?partnerref=EC_WebGoing Beyond the Fan: The Future of Power Supply Thermal Management Join MEAN WELL and Sager Power Systems, a specialized group of Sager Electronics, as they discuss the vast worldIn this webinar, you’ll gain an understanding of the vast world of cooling methods available for power supplies. You have to decide which one of those you need to beat for the functionality of your design and to be within your cost budget.The answer is given in Annex A of the ISO standard on climatic loads in road vehicles (ISO 16750-4):For every mounting location, an operating temperature range is recommended. "Military engine turbine blades experience two significant deformation stresses during normal service, Commercial and retail products are manufactured to less stringent requirements than those for military and aerospace applications. Schematic representation of ROC and AMR in relation to performance and reliability.The thought process in developing the recommended operating conditions rating relates to the electrical parameter variation with temperature. Of course, it is best to have a temperature and humidity controlled environment for any electronics assembly environment. Conventional-temperature electronic circuits require a thermal source for low-temperature applications. We recommend downloading and installing the latest version of one of the following browsers:Our site is not optimized for your current browser. For example, uprated parts are used in telecommunication systems and in flight management and engine control systems.
Check the product manual for model-specific information. For example, when AMD left the military parts business in 1994, it stated “AMD has positioned itself to be a leader in the development and manufacture of integrated circuits for the personal and networked computation and communication sectors. Parts that belong to a robust process with enhanced capability are likely to be able to perform and provide stable and predictable electrical parameters beyond their recommended operating conditions (ROC) ratings.The absolute maximum rating (AMR) section in the datasheet includes limits on operational and environmental parameters, including power, power derating, supply and input voltages, operating temperature, junction temperature, and storage temperature.The International Electrotechnical Commission (IEC) [5] defines absolute maximum ratings as “limiting values of operating and environmental conditions applicable to any electronic device of a specific type as defined by its published data, which should not be exceeded under the worst possible conditions. It also manages high vibration and shock for outdoor … There are several standards that list methods of testing, such as ISO 16750-4 and AEC-Q100. It has anti-corrosion … All concerns regarding AMR relate only to the reliability and physical failures of the parts.ZiLOG [7] states, “AMRs (Absolute Maximum Ratings) are given to allow our customers to understand at what point physical damage can occur to the device under stress. Our symposium covers various subjects: from new numerical methods and fundamental research until engineering applications. Hi, The UCC3817A PFC controller IC has an operating temperature range of 0-70degc. But they add that if the part is used over a long period, they have reliability concerns for useful life [9].The part manufacturers provide absolute maximum ratings as limits for reliable operation.