HFA80NC40CSM
5
PD-2.471 rev. B 01/99
4. Qrr
- Area under curve defined by t
rr
and I
RRM
t
rr X IRRM
Q
rr
=
2
5. di(rec)M/dt - Peak rate of change of
current during t
b
portion of t
rr
V
(AVAL)
VR(RATED)
IL(PK)
DECAY
TIME
Fig. 11
- Avalanche Test Circuit and Waveforms
Fig. 10
- Reverse Recovery Waveform and
Definitions
Fig. 9
- Reverse Recovery Parameter Test
Circuit
ta
tb
trr
Q
4
rr
IF
IRRM
0.5
IRRM
di(rec)M/dt
0.75
IRRM
5
3
2
0
1
di /dtf
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 I
F
to point where a line passing
through 0.75 I
RRM
and 0.50 I
RRM
extrapolated to zero current
REVERSE RECOVERY CIRCUIT
IRFP250
D.U.T.
L = 70μH
V = 200VR
0.01Ω
ADJUST
G
D
S
dif/dt
CURRENT
MONITOR
HIGH-SPEED
SW ITCH
DUT
Rg = 25 ohm
+
FREE-WHEEL
DIODE
Vd = 50V
L = 100μH
http://www.irf.com Fax-On-Demand: +44 1883 733420 Data and specifications subject to change without notice.
WORLD HEADQUARTERS:WORLD HEADQUARTERS:WORLD HEADQUARTERS:WORLD HEADQUARTERS:WORLD HEADQUARTERS:
233 Kansas St., El Segundo, California 90245 U.S.A. Tel: (310) 322 3331. Fax: (310) 322 3332.
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Hurst Green, Oxted, Surrey RH8 9BB, U.K. Tel: ++ 44 1883 732020. Fax: ++ 44 1883 733408.
IR CANADA:IR CANADA:IR CANADA:IR CANADA:IR CANADA:
15 Lincoln Court, Brampton, Markham, Ontario L6T3Z2. Tel: (905) 453 2200. Fax: (905) 475 8801.
IR GERMANY:IR GERMANY:IR GERMANY:IR GERMANY:IR GERMANY:
Saalburgstrasse 157, 61350 Bad Homburg. Tel: ++ 49 6172 96590. Fax: ++ 49 6172 965933.
IR IR IR IR ITALY:ITALY:ITALY:ITALY:ITALY:
Via Liguria 49, 10071 Borgaro, Torino. Tel: ++ 39 11 4510111. Fax: ++ 39 11 4510220.
IR FAR EAST:IR FAR EAST:IR FAR EAST:IR FAR EAST:IR FAR EAST:
K&H Bldg., 2F, 30-4 Nishi-Ikebukuro 3-Chome, Toshima-Ku, Tokyo, Japan 171. Tel: 81 3 3983 0086.
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1 Kim Seng Promenade, Great World City West Tower,13-11, Singapore 237994. Tel: ++ 65 838 4630.
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16 Fl. Suite D.207, Sec. 2, Tun Haw South Road, Taipei, 10673, Taiwan. Tel: 886 2 2377 9936.
IR
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