Thermal characteristics
STM8S003K3 STM8S003F3
The following example shows how to calculate the temperature range needed for a given
application.
Assuming the following application conditions:
Maximum ambient temperature TAmax= 75 °C (measured according to JESD51-2)
•
IDDmax = 8 mA, VDD = 5 V
•
Maximum 20 I/Os used at the same time in output at low level with
•
IOL = 8 mA, VOL= 0.4 V
PINTmax = 8 mA x 5 V = 400 mW
Amax
PDmax = 400 mW + 64 mW
•
Thus: PDmax = 464 mW
TJmax for LQFP32 can be calculated as follows, using the thermal resistance ΘJA:
TJmax = 75 °C + (60 °C/W x 464 mW) = 75 °C + 27.8 °C = 102.8 °C
This is within the range of the suffix 6 version parts (-40 < TJ < 105 °C).
In this case, parts must be ordered at least with the temperature range suffix 6.
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