SLVSE17A May 2019 – April 2020 TPS1HB16-Q1
The 80 W heater load will cause a DC current in the channel under maximum load power condition of around 5.9 A. Therefore, this current at 13.5 V will assume worst case heating.
Power dissipation in the switch is calculated in Equation 4. RON is assumed to be 32 mΩ because this is the maximum specification at high temperature. In practice, RON will almost always be lower.
The maximum junction temperature rating for the TPS1HB16-Q1 is TJ = 150°C. Based on the above example calculation, the device temperature will stay below the maximum rating even at this high level of current.