HFA75MB40C datasheet(5/5 Pages) IRF

5 / 5 page

HFA75MB40C

4. Qrr - Area under curve defined by trr

and IRRM

trr X IRRM

Qrr =

5. di(rec)M/dt - Peak rate of change of

current during tb portion of trr

V (AVAL)

R(RATED)

I L(PK)

DECAY

TIME

Fig. 11 - Avalanche Test Circuit and Waveforms

Fig. 10 - Reverse Recovery Waveform and

Definitions

Fig. 9 - Reverse Recovery Parameter Test

Circuit

trr

Qrr

I RRM

0.5

di(rec)M/dt

0.75 IRRM

di /dt

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

= 200V

0.01

Ω

dif/dt

ADJUST

CURRENT

MONITOR

HIGH-SPEED

SWITCH

DUT

Rg = 25 ohm

FREE-WHEEL

DIODE

Vd = 50V

L = 100µH

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http://www.irf.com/

Data and specifications subject to change without notice.

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