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| MURD620CTPBF Datasheet, PDF (5/8 Pages) International Rectifier – Ultrafast Rectifier | |||
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MURD620CTPbF
Bulletin PD-21093 09/05
Reverse Recovery Circuit
VR = 200V
L = 70µH
0.01 â¦
D.U.T.
ddiif/Fd/tdt
ADJUST G
D
IRFP250
S
Fig. 9- Reverse Recovery Parameter Test Circuit
IF
0
3
trr
ta
tb
1 difF/d/dtt
2 I RRM
Q rr 4
0.5 I RRM
di(rec)M/dt 5
0.75 IRRM
1. diF/dt - Rate of change of current through zero
crossing
2. IRRM - 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 t rr
and IRRM
Q
rr
=
t
rr
x
I
2
RRM
5. di(rec)M/dt - Peak rate of change of
current during tb portion of trr
Fig. 10 - Reverse Recovery Waveform and Definitions
www.irf.com
5
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