GaN EZ Drive GS65011-EVBEZ Technisch handboek - Pagina 8
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Duty Cycle Control
Figure 4 •
The PWM signal is adjusted by tuning the controller's peripheral resistors, R11 and R3. Use the
to set the duty cycle with R11. Use
Table 1
Select the appropriate values according to your own specifications and requirements.
safe start up, 10% duty cycle and frequency 250kHz is
Table 1 •
PWM Duty Cycle Setting up table
Table 2 •
PWM Frequency Setting up table
GSWPT-EVBEZ Rev. 210307
EZDrive
000 ohm)
Freq control input
RT=120pF;
RT=R3+RT2=25kΩ;
Fsw=200kHz
GS65011-EVBEZ PWM signal adjustment diagram
Table 2
R11 (Ω)
Case 1
1000
Case 2
850
Case 3
500
Case 4
0
f
SW_MIN
R3 (kΩ)
20
CT (pF)
120
f
(kHz)
200
SW
© 2021 GaN Systems Inc.
Please refer to the Evaluation Board/Kit Important Notice on page 17
®
Open Loop Boost Evaluation Board
PWM output
Vpk=1.8V
Vvalley=1.2V
to set the switching frequency with R3.
recommended.
IN1+ (V)
Duty Cycle
1.83
0 %
1.74
10 %
1.52
47 %
1.15
100 %
f
f
SW
SW_MAX
5
0
120
120
500
900
www.gansystems.com
GS65011-EVBEZ
Technical Manual
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8