Cascode Provides Normally-OFF Function
Native d-mode GaN HEMT + LV Si FET in cascode
– Rds(on) is compromised to shift threshold positive
Cascode has easy gate drive
Cascode includes excellent body diode
2-chip solution no more difficult than IGBT
Almost zero “Miller Effect”
– C dv/dt immunity
– Enables turn-off ZVS
in almost any topology
APEC 2015 Seminar S17
26
D
S
G
Low Voltage
Si MOSFET
Depletion-Mode
GaN HEMT
Hybrid Semiconductor Device, US Pat. 8,017,978
Hybrid semiconductor device having a GaN transistor and
a Silicon MOSFET, US Pat. 8,368,120