www.vishay.com

Document Number: 91266

6

S-Pending-Rev. A, 21-Jul-08

IRFR120, IRFU120, SiHFR120, SiHFU120

Vishay Siliconix

Fig. 12a - Unclamped Inductive Test Circuit

Fig. 12b - Unclamped Inductive Waveforms

Fig. 12c - Maximum Avalanche Energy vs. Drain Current

Fig. 13a - Basic Gate Charge Waveform

Fig. 13b - Gate Charge Test Circuit

R

G

0.01

Ω

D.U.T

L

V

DS

+

-

V

DD

10 V

Q

GS

Q

GD

Q

G

Charge

V

GS

D.U.T.

3 mA

V

GS

V

DS

I

G

I

D

0.3 µF

0.2 µF

50 k

Ω

12 V

Current regulator

Current sampling resistors

Same type as D.U.T.

+

-