Document Number: 91055

www.vishay.com

S11-1049-Rev. C, 30-May-11

5

This document is subject to change without notice.

IRF740S, SiHF740S

Vishay Siliconix

Fig. 9 - Maximum Drain Current vs. Case Temperature

Fig. 10a - Switching Time Test Circuit

Fig. 10b - Switching Time Waveforms

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

91055_09

0

4

6

8

10

25

150

125

100

75

50

2

Pulse width

≤ 1 µs

Duty factor

≤ 0.1 %

R

D

V

GS

R

g

D.U.T.

10 V

+

-

V

DS

V

DD

V

DS

90 %

10 %

V

GS

t

d(on)

t

r

t

d(off)

t

f

91055_11

D

= 0.5

0.2

0.1

0.05

0.01

Single Pulse

(Thermal Response)

P

DM

t

1

t

2

Notes:

1. Duty Factor, D = t

2. Peak T

0.02

10

1

0.1

0.1

1

10