Soft Switching Series
IHW30N90T
q
i,v
di /dt
F
I
F
I
rrm
t =t +t
rr S F
Q =Q +Q
rr
S
F
t
rr
t
t
S
F
QQ
S
F
10% I
t
rrm
di /dt V
90% I r r
R
rrm
Figure A. Definition of switching times
Figure C. Definition of diodes
switching characteristics
τ1
r1
Tj (t)
p(t)
r1
τ2
r2
r2
τn
rn
rn
TC
Figure D. Thermal equivalent
circuit
Figure B. Definition of switching losses
Power Semiconductors
11
Rev. 2.1 Apr 06