SLVSDN4 June 2017 TPS82150
The output current of the TPS82150 needs to be derated when the device operates in a high ambient temperature or delivers high output power. The amount of current derating is dependent upon the input voltage, output power, PCB layout design and environmental thermal condition. Care should especially be taken in applications where the localized PCB temperature exceeds 65°C.
The TPS82150 module temperature must be kept less than the maximum rating of 125°C. Three basic approaches for enhancing thermal performance are below:
To estimate approximate module temperature of TPS82150, apply the typical efficiency stated in this datasheet to the desired application condition to find the module's power dissipation. Then calculate the module temperature rise by multiplying the power dissipation by its thermal resistance. For more details on how to use the thermal parameters in real applications, see the application notes: SZZA017 and SPRA953.