Author Archives: FTD Admin
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iPhone Thermal Analysis
Posted on July 19, 2015 by FTD Admin in Simulation.All phones from all manufacturers overheat! Including the newest iPhone 6 from Apple. Multiple causes can produce overheating issues, but something is certain, companies invest significant resources to make sure their products are well designed and meet all thermal specifications, and sometimes the efforts fail. In this article we build a thermal model for iPhone […]
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How much heat ?
Posted on June 6, 2015 by FTD Admin in Simulation.We present a quick simulation study on the Raspberry B+. First, we estimate the power dissipation using our power budget calculator from a previous blog (>>click here<<). We impose the following conditions: ambient temperature of 25 ºC and housing temperature of 40 ºC, this is the maximum allowable touch temperature at the external surfaces of the […]
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Effective conductivity of graphite
Posted on May 15, 2015 by FTD Admin in Calculators.Graphite requires special attention in thermal modeling as the thin layers of adhesive and coating reduce the spreading performance. Modeling only the graphite layer would produce enhanced results. However, modeling the individual layers will increase mesh-density as the typical thickness for the adhesive and coating can vary from 5 to 25μm. Alternatively, one can lump […]
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Power budget calculator
Posted on May 11, 2015 by FTD Admin in Calculators.The power budget calculator estimates the maximum (or idealized) heat dissipation on a passive device. The calculation is based on the assumption that all surfaces dissipate heat at a uniform temperature. The heat dissipation in a real device can be considerably lower. The idealized value can be adjusted by a factor (0 – 1). […]
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Dropcam thermal teardown
Posted on May 5, 2015 by FTD Admin in Thermal teardown.We tore down the Dropcam Pro camera for thermal analysis. The camera reveals a simple but clever thermal design that uses an aluminum rear-housing treated with soft touch paint to reduce perception of heat when touched. There is a dedicated heat sink for the image processor and a graphite sheet reinforced with cooper to dissipate heat […]
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