DocID16373 Rev 2

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VN5E025MJ-E

Package and PC board thermal data

33

Figure 34. PowerSSO-12 thermal impedance junction ambient single pulse

Equation 1: pulse calculation formula:

Figure 35. Thermal fitting model of a single channel HSD in PowerSSO-12

1.

The fitting model is a semplified thermal tool and is valid for transient evolutions where the embedded

protections (power limitation or thermal cycling during thermal shutdown) are not triggered.

0,1

1

10

100

0,0001

0,001

0,01

0,1

1

10

100

1000

Time ( s)

ZTH ( ° C/ W)

Footprint

Z

TH

δ

R

TH

δ Z

δ

–

()

+

⋅

=

where

δ

t

⁄

=