www.vishay.com

Document Number: 91232

6

S-Pending-Rev. b, 26-Jun-08

IRFP450N, SiHFP450N

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

A

R

G

0.01

Ω

D.U.T.

L

+

Driver

A

15 V

20 V

25

50

75

100

125

150

0

50

100

150

200

250

300

Starting T , Junction Temperature ( C)

J

°

ID

TOP

BOTTOM

6.3A

8.9A

14A

Q

GS

Q

GD

Q

G

Charge

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.

+

-