© 1995 Thinki Semiconductor Co., Ltd.

http://www.thinkisemi.com.tw/

Page 4/5

Rev.11T

APT30DQ120BCT/APT30DQ120BCTG

4

3

1

2

5

5

Zer o

1

2

3

4

di

I

I

.

trr - Reverse R ecovery Time, measured from zero crossing wher

e diode

Qrr - Area Under the Curve Defined by I

rr.

current goes from positive to negative, to the point at which the straight

line through I

.

0.25 IRR M

PEARSON 2878

CURRENT

TRANSFORMER

di

30μH

D.U.T.

+18V

0V

V r

trr/Qrr

Waveform

Fig. 9. Diode Test Circuit

Fig. 10. Diode Reverse Recovery Waveform and Definition