DS10473 Rev 2

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STPA003

General information

24

5.5

Heat sink definition

Assuming we have a maximum dissipated power of 26 W (e.g. in the worst case situation of

temperature is 70 °C, the available temperature gap for a correct dissipation is 80 °C.

The junction to case thermal resistance is 1 °C/W. So the heat sink thermal resistance

should be approximately 2 °C/W. This would avoid any thermal shutdown occurrence even

after long-term and full-volume operation.