April 2011
Intermediate to advanced
400 pages
16h 50m
English
Content preview from Power Sources and Supplies: World Class Designs
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Chapter 3
3.18.7 Temperature Rise
The vendor has stated that the inductor is such that 380 mW dissipation corresponds to
50°C rise in temperature. In effect this tells us that the thermal resistance of the core I is
Rth
T
W
50
038
131 6
.
. °C/W (any topology)
The inductor was originally designed for a total loss of
PP P
CORE CU
mW (any topology)385 18 8 403 8..
This would have given a temperature rise of
TRthP 131 6 0 404 53.. ( )°C any topology
In our application
PP P
CORE CU
mW389 2 391
This will give a temperature rise of
TRthP 131 6 0 391 51.. °C
Provided we accept this temperature ...
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