Datasheet

Document Number: 91055 www.vishay.com
S-83029-Rev. A, 19-Jan-09 5
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
I
D
, Drain Current (A)
T
C
, Case Temperature (°C)
0
4
6
8
10
25 1501251007550
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
1
/t
2
2. Peak T
j
= P
DM
x Z
thJC
+ T
C
0.02
Thermal Response (Z
thJC
)
10
1
0.1
10
-2
t
1
, Rectangular Pulse Duration (S)
10
-5
10
-4
10
-3
10
-2
0.1 1 10