The thermal images in Figure 2-3, Figure 2-4, Figure 2-5, and Figure 2-6 were taken with an input voltage of 48V, an output voltage of 35V, and a load of 8.57A to achieve a total output power of 300W.

Both of the power stage inductors, L2 and L3, as seen in Figure 2-4 and Figure 2-5, experienced a rise of 57°C and 54°C respectively above the ambient room temperature of 23°C. Similarly, the power stage controller (U2), as seen in Figure 2-6, experienced a 50°C rise above that 23°C ambient temperature.

Figure 2-3 Board Overview

Figure 2-4 L3 Temperature

Figure 2-5 L2 Temperature

Figure 2-6 U2 Temperature