A thermal image is shown in Figure 2-7. Not too much thermal data can be gained from the top view due to SR card and GaN cards being vertical to main board and screwed to water-cooling heat sink.

Test condition: 400V_in, 16V_out, room temperature, 20°C degree liquid coolant.

Figure 2-7 Thermal Image at 180A_out, Top View

The magnetics of HV to LV DC/DC converter contain a transformer and a choke. The leakage of Transformer is used as resonant inductor in PSFB topology. Figure 2-8 is the mechanical drawing and dimensions of magnetics. Figure 2-9 shows the position of thermocouple. Figure 2-10 shows the test result when 400V_in, 16V_out, 100A_out with 20°C degree liquid coolant. Figure 2-11 shows the test result when 400Vin, 16Vout, 180Aout with 20 C degree liquid coolant.

Figure 2-8 Mechanical Drawing and Dimensions

Figure 2-9 Position of Thermocouple

Figure 2-10 Magnetic Thermal Performance at 100A_out

Figure 2-11 Magnetic Thermal Performance at 180A_out