Losses and heatsink estimation

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I was wondering what values did the software used to calculate it's Losses and Heatsink Estimation?

In the "acceptable temperature rise considered" box, are we talking about ambiant temperature or junction temperature?




The software calculates losses based on known device parameters. For example: RDSON is used to calculate the conduction losses while the MOSFET switching times are used to calculate the switching losses. A similar approach is used to calculate diode/transformer losses. As far a s heatsink is concerned, we use empirical results from our bench testing to find the optimum size of heatsinking.