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5.1 DC routing
From an electrical point of view, the minimum track cross-section is defined by the maximum current required and by the maximum permissible temperature rise relative to the ambient temperature.
I = k × ΔT 0.44 × A 0.725 (source IPC-2221A)
with :
- I :
-
current (in amperes),
- ΔT :
-
difference between ambient temperature and maximum permissible assembly temperature (in degrees),
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