IGBT Snubber
Maximum collector current
I
Cmax
=
A
Maximum collector emitter voltage
V
CE
=
V
Maximum collector voltage rise time
t
r
=
µs
Maximum collector current fall time
t
f
=
µs
Switching frequency
f
s
=
kHz
Duty cycle (conduction period 0..1)
d =
*100%
Calculate R & C
Snubber capacitor
C =
nF
Snubber resistor (Discharge within 3*t
on
)
R =
Ohm
Discharge current IGBT during t
on
I
dis
=
A
Minimum value of R to ensure that I
C
< I
Cmax
R
min
=
Ohm
IGBT on time (conduction interval)
t
on
=
µs
Maximum resistor power rating
P
R
=
W
Reset form
Source:High frequency Switching Power Supplies, George Chryssis