STK672-442BN-E

No.A2249-25/28

6. Mitigated Curve of Package Power Loss, PdPK, vs. Ambient Temperature, Ta

Package power loss, PdPK, refers to the average internal power loss, PdAV, allowable without a heat sink.

The figure below represents the allowable power loss, PdPK, vs. fluctuations in the ambient temperature, Ta.

Power loss of up to 2.8W is allowable at Ta=25

C, and of up to 1.5W at Ta=60C.

* The package thermal resistance θc-a is 28.6°C/W.

0

0.5

1

1.5

2

2.5

3

0

20406080

100

120

Ambient temperature, Ta -

°C

Allowable power dissipation, PdPK (no heat sink) - Ambient temperature, Ta