GS66508T-EVBHB 650V
GaN E-HEMT Half Bridge Evaluation Board
User’s Guide
_____________________________________________________________________________________________________________________
GS66508T-EVBHB UG rev. 150917
© 2015 GaN Systems Inc.
www.gansystems.com 14
Please refer to the Evaluation Board/Kit Important Notice on page 21
a) Turn-on waveforms (400V/22A)
b) Turn-off waveforms (400V/30A)
Figure 13 - Pulse test switching waveforms turn-on and turn-off
Synchronous Buck Test (L=120uH, V
IN
=400V, V
OUT
=200V, D=50%, F
SW
=100 kHz, P
OUT
=0-2kW)
The board is converted to a synchronous buck DC/DC converter and demonstrates efficiency >98.5% from
1kW to 2kW. With forced air cooling, the peak device temperature T
J_MAX
was measured at <80
°
C at
1500W output.
Figure 14 - Synchronous Buck Efficiency (V
IN
=400V, V
OUT
=200V, D=50%, F
SW
=100kHz)
