stk672-442b-e Sanyo Semiconductor Corporation, stk672-442b-e Datasheet - Page 21

• Manufacturer Part Number: stk672-442b-e
• Description: 2-phase Stepping Motor Driver
• Manufacturer: Sanyo Semiconductor Corporation

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.
Allowable power dissipation, PdPK (no heat sink) - Ambient temperature, Ta
3.0
2.5
2.0
1.0
1.5
0.5
0
0
20
Ambient Temperature, Ta - °C
STK672-442B-E
40
PdPK - Ta
60
80
100
ITF02718
120
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