TPA6139A2: Thermal performance

Part Number: TPA6139A2

Hi Team,

My customer is designing TPS6139A2 in his schematic and would like to know the thermal performance when the worst case happen.

The supply voltage is 3.3V, in the worst case the max. limited output current is 60mA. The power dissipation is 3.3V*0.06mA*2ch=0.396W. RθJA of TSSOP package is 130°C/W, so the Tj=0.396*130+25=76.48°C (room temp. is 25°C).

Please comment is my understanding is correct or not.

Thanks very much.

Vincent Chen