GS65011-EVBEZ
EZDrive
TM
Open Loop Boost Evaluation Board
User’s Guide
_____________________________________________________________________________________________________________________
GSWPT-EVBEZ Rev190621
© 2019 GaN Systems Inc.
www.gansystems.com 11
Please refer to the Evaluation Board/Kit Important Notice on page 15
Hardware Operation
The general guidelines for operating the evaluation board are listed in this section. Follow
the steps to configure the hardware properly.
1)
Pre-set the PWM frequency and the duty cycle (by tuning R3 and R11), according to
the PWM signal look-up tables. Start with 10% duty cycle and frequency 250kHz.
2)
Apply V
CC
(5V
DC
< V
CC
< 12V
DC
) to Vcc+ and Vcc-, use T_GS (MMCX JACK) or G/SS
(VIAS) for V
GS
monitoring
3)
Check the V
GS
waveform and fine-tune the PWM frequency (by tuning R3) and duty
cycle (by tuning R11)
4)
For taking an efficiency measurement, add a current meter and use Vin+ and Vin- for
V
IN
and use Vout+ and Vout- for V
OUT
measurement.
5)
Always connect a load (E-load) to Vout+ and Vout-
6)
Apply V
DC
to Vin+ and Vin- and sweep the voltage from low (0V) to max. Monitor
the output voltage and device temperature. Make sure V
OUT
is lower than 400V, and
the GaN device temperature is lower than 150°C. Note: the maximum input voltage
is limited by the output voltage of the Boost converter, which is dependent on the
operating mode, the duty cycle and the load value.
7)
After testing, turn off V
IN
first, then V
CC
across Vcc+ and Vcc- last.
