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Document Number: 91033

6

S-Pending-Rev. A, 19-Jun-08

IRF634N, IRF634NL, IRF634NS, SiHF634N, SiHF634NL, SiHF634NS

Vishay Siliconix

Fig. 11 - Maximum Effective Transient Thermal Impedance, Junction-to-Case

Fig. 12a - Unclamped Inductive Test Circuit

Fig. 12b - Unclamped Inductive Waveforms

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

10

1

0.1

0.1

P

DM

t

1

t

2

Notes:

1. Duty Factor, D = t

2. Peak T

Single Pulse

(Thermal Response)

0

− 0.5

0.2

0.1

0.05

0.02

0.01

91033_11

A

R

G

0.01

Ω

D.U.T

L

+

Driver

15 V

20 V

200

0

40

80

120

160

25

150

125

100

75

50

Bottom

Top

I

D

2.0 A

3.4 A

4.8 A

91033_12c

175