IRF740, SiHF740
Vishay Siliconix
10
V
GS
V
DS
R
D
I
D
, Drain Current (A)
8
D.U.T.
+
-
V
DD
R
G
6
10
V
Pulse
width
≤
1
µs
Duty factor
≤
0.1
%
4
Fig. 10a - Switching Time Test Circuit
2
V
DS
25
50
75
100
125
150
90
%
0
91054_09
T
C
, Case Temperature (°C)
10
%
V
GS
t
d(on)
t
r
t
d(off)
t
f
Fig. 9 - Maximum Drain Current vs. Case Temperature
Fig. 10b - Switching Time Waveforms
10
Thermal Response (Z
thJC
)
1
0
-
0.5
0.2
0.1
0.1
0.05
0.02
0.01
10
-2
10
-5
10
-4
10
-3
10
-2
0.1
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
1
10
91054_11
t
1
, Rectangular Pulse Duration (S)
Fig. 11 - Maximum Effective Transient Thermal Impedance, Junction-to-Case
L
Vary
t
p
to obtain
required I
AS
R
G
V
DS
V
DS
t
p
V
DD
D.U.T
I
AS
+
-
V
DD
V
DS
10
V
t
p
0.01
Ω
I
AS
Fig. 12b - Unclamped Inductive Waveforms
Fig. 12a - Unclamped Inductive Test Circuit
Document Number: 91054
S-81291-Rev. A, 16-Jun-08
www.vishay.com
5
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