Since ambient temperature in the vicinity of the IGBT/MOSFET driver will have an effect on the actual power dissipation capability of the driver, the maximum allowable power dissipation at this temperature will need to be derated accordingly (in comparison to room temperature). The selected IGBT/MOSFET driver can only be used if the maximum allowable power dissipation at this temperature is within the capability of this IGBT/MOSFET driver.