Datasheet

www.vishay.com Document Number: 91055
6 S-83029-Rev. A, 19-Jan-09
IRF740S, SiHF740S
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
R
G
I
AS
0.01 Ω
t
p
D.U.T
L
V
DS
+
-
V
DD
10 V
Vary t
p
to obtain
required I
AS
I
AS
V
DS
V
DD
V
DS
t
p
91055_12c
Bottom
To p
I
D
4.5 A
5.3 A
10 A
V
DD
= 50 V
1200
0
200
400
600
800
1000
25 150
125
10075
50
Starting T
J
, Junction Temperature (°C)
E
AS
, Single Pulse Energy (mJ)
Q
GS
Q
GD
Q
G
V
G
Charge
V
GS
D.U.T.
3 mA
V
GS
V
DS
I
G
I
D
0.3 µF
0.2 µF
50 kΩ
12 V
Current regulator
Current sampling resistors
Same type as D.U.T.
+
-