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COSEL Power Supply, Noise Filter 2025 Product Catalog
DC-DC Converters Bus Converter-Power Module TypeInstruction Manual6 Lifetime expectancy depends onstress by temperature difference!Regarding lifetime expectancy design of solder joint, followingcontents must be considered.It must be careful that the soldering joint is stressed by temperaturerise and down which is occurred by self-heating and ambienttemperature change.The stress is accelerated by thermal-cycling, therefore the temperaturedifference should be minimized as much as possible iftemperature rise and down is occurred frequently.!Product lifetime expectancy depends on the aluminum base platecentral temperature difference (DTc) and number of cycling in aday is shown in Fig.6.1.If the aluminum base plate center part temperature changes frequentlyby changing output load factor etc., the above the lifetimeexpectancy design should be applied as well.Please contact us for details.15Lifetime expectancy [years]1051time ON/OFF /1day2time ON/OFF /1day3time ON/OFF /1day4time ON/OFF /1day5time ON/OFF /1day025 30 35 40 45 50 55 60 65 70The aluminum base plate central temperature differenceDTc [C]Fig.6.1 Lifetime expectancy against rise/fall temperature differenceApplication manuals available at our website.Recommended external components are also introduced for yourreference.DCS-13
