Infineon CoolGaN IGI60F1414A1L, Manual, Page: 16 / 27

Application Note 16 of 27 V 1.0
2021-04-30
CoolGaN™ IPS half-bridge evaluation board with IGI60F1414A1L
Setup and use
4.10 Soft-switching performance test
With buck topology and no DC load connected to the evaluation board, a complete soft-switching performance
of the chipset can be observed.
Figure 19 shows the test performed on the board using 100 uH inductor and
function generator set at 200 kHz with duty cycle of 50 percent. With 400 V DC bus, the output settles at 200 V
and the peak-peak current will be about 5 AMP. The expanded view is shown in
Figure 20 . Both high and low
side GaN transistors are operating in ZVS mode with about 8 V/ns. The negative spikes on the high side gate
voltage is due to the non-linear capacitance of C
rss
(related to the GaN device) for more information refer to
section 4.2.2 in reference [1]. Figure 21 shows the thermal image of the IPS chipset operating at around 54°C.
Figure 19 Operating waveforms in soft-switching mode at 200 kHz , 5 A pk-pk current
Figure 20 Expanded view of operating waveforms in soft-switching mode at 200 kHz , 5 A pk-pk current