Infineon CoolGaN, Manual, Page: 11 / 23

Application Note 11 of 23 V 1.1
2020-11-09
CoolGaN™ 600 V half-bridge evaluation platform featuring GaN
EiceDRIVER™
Setup and use
+5V
Vsw
Isolated Gate
Driver Circuit
Isolated Gate
Driver Circuit
Deadtime
Circuit
Deadtime
Circuit
Isolated Gate
Drive Power
Vin+
Vo
Vin-
PWM
0V
Evaluation Board
0-400 V DC
Laboratory
Power Supply
Test
Inductor
+
-
5 V DC
Laboratory
Power Supply
50
Ω Pulse
Generator
DC
Load
Figure 9 Connecting the evaluation board in the buck topology
Figure 10 shows example waveforms operating in ZVS buck mode at 1.5 MHz. The circuit is connected per
Figure 9 , using a 12 µH RF inductor (28 turns of 675/#48 Litz wire on Micrometals T80-2 toroidal core). The input
voltage is 400 V, and the output voltage is about 260 V (65 percent duty-cycle). The load is set to 2.5 A, about
650 W output power.
Figure 10 Operating waveforms ZVS buck-mode at 1.5 MHz, 650 W load.