Question: (a) A power amplifier IC has a power-conversion efficiency of 55%. Let the average power drawn from supplies is 20W and the maximum junction

(a) A power amplifier IC has a power-conversion efficiency of 55%. Let

(a) A power amplifier IC has a power-conversion efficiency of 55%. Let the average power drawn from supplies is 20W and the maximum junction temperature Tmax=150C, please find the maximum thermal resistance OJA for safely operating at ambient temperature of 60C. (b) If the OJA=15C/W, please find the junction temperature if the IC is operating at 25C and is dissipating 5W.

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