SLVUAM8B December 2015 – August 2021 TPS54A20
The efficiency of this EVM peaks at a load current of about 5 A and then decreases as the load current increases toward full load. Figure 2-1 shows the efficiency for the TPS54A20EVM-770 at an ambient temperature of 25°C.
Figure 2-2 shows the efficiency for the TPS54A20EVM-770 using a semi-log scale to more easily show efficiency at lower output currents. The ambient temperature is 25°C.
The efficiency may be lower at higher ambient temperatures, due to temperature variation in the drain-to-source resistance of the internal MOSFET.