Soft Switching Series
IHW20N120R
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
rr
90% I
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
Figure E. Dynamic test circuit
Leakage inductance Lσ =180nH
an d Stray capacity Cσ =39pF.
Rev. 2.4 May 06