HFA15TB60PbF
5
www.irf.com © 2015 International Rectifier
Submit Datasheet Feedback February 17, 2015
Fig. 9 - Reverse Recovery Parameter Test Circuit
REVERSE RECOVERY CIRCUIT
IRFP250
D.U.T.
L = 70µH
V = 200V
R
0.01
G
D
S
dif/dt
ADJUST
t
a
t
b
t
rr
Q
rr
I
F
I
RRM
I
RRM
0.5
di(rec)M/dt
0.75
I
RRM
5
4
3
2
0
1
di /dt
f
1. dif/dt - Rate of change of current
through zero crossing
2. I
RRM - Peak reverse recovery current
3. trr - Reverse recovery time measured
from zero crossing point of negative
going IF to point where a line passing
through 0.75 IRRM and 0.50 IRRM
extrapolated to zero current
4. Qrr - Area under curve defined by trr and
IRRM
t
rr X IRRM
Q
rr =
2
5. di(rec)M/dt - Peak rate of change of
current during t
b portion of trr
Fig. 10 - Reverse Recovery Waveform and Definitions
