www.irf.com 5
HFB16HY20CC
4. Qrr - Area under curve defined by trr
and IRRM
trr X IRRM
Qrr =
2
5. di(rec)M/dt - Peak rate of change of
current during tb portion of trr
Fig. 10 - Reverse Recovery Waveform and Definitions
Fig. 9 - Reverse Recovery Parameter Test Circuit
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
1
di /dt
f
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
REVERSE RECOVERY CIRCUIT
IRFP250
D.U.T.
L = 70µH
V = 200V
R
0.01
Ω
G
D
S
dif/dt
ADJUST
Case Outline and Dimensions — TO-257AA
127(6
',0(16,21,1*72/(5$1&,1*3(5$16,<0
&21752//,1*',0(16,21,1&+
',0(16,216$5(6+2:1,10,//,0(7(56>,1&+(6@
287/,1(&21)250672-('(&287/,1(72$$
PIN ASSIGNMENT S ( CERAMIC EYE LETS )
1 = ANODE 1
2 = COMMON CATHODE
3 = ANODE 2
>@
>@
>@
0$;
%
>@
>@
>@
>@
>@
>@
>@
>@
>@
>@
>@
>@
>@ &$ %
; ;
>@
&
>@
>@
$
>@
>@
;
>@
>@
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
IR LEOMINSTER : 205 Crawford St., Leominster, Massachusetts 01453, USA Tel: (978) 534-5776
TAC Fax: (310) 252-7903
Visit us at www.irf.com for sales contact information.
Data and specifications subject to change without notice. 03/2006