SH7763 Datasheet, PDF (2011/2026 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Appendix
J.2 Analysis Results of Heat Resistance Simulation
Table J.1 shows the analysis results of heat resistance simulation. As shown, Tj exceeds 125°C
when TA = 60°C and a heat sink is not provided. Therefore, if Ta possibly exceeds 60°C, heat
radiation measures are indispensable.
Table J.1 Heat Resistance Simulation Results
Power Consumption (W) Heat Sink
Ta (°C)
Tj (°C)
θja (°C/W)
2.4
Not provided 75
136.9
25.8
2.4
Provided
75
116.9
17.4
2.4
Not provided 60
122.9
26.2
Note: Tj and θja vary depending on the PCB, casing, heat source, and other environmental
factors.
Casing
Heat sink
This LSI
PCB
Figure J.1 Overall View of Simulation Model (with heat sink)
Rev. 1.00 Oct. 01, 2007 Page 1945 of 1956
REJ09B0256-0100