IRF9540NS/LPbF
L
V
DS
350
300
250
200
150
100
50
I
D
D.U.T
R
G
V
DD
A
TOP
-6.7A
-9.6A
BOTTOM -14A
I
AS
DRIVER
-20V
0.01
t
Ω
p
15V
Fig 12a. Unclamped Inductive Test Circuit
I
AS
0
25
50
75
100
125
150
Starting T , Junction Temperature (°C)
J
Fig 13. Maximum Avalanche Energy
vs. Drain Current
t
p
V
(BR)DSS
Fig 12b. Unclamped Inductive Waveforms
Current Regulator
Same Type as D.U.T.
50KΩ
Q
G
.2µF
12V
.3µF
-10V
-
V
+
DS
Q
Q
GD
GS
D.U.T.
V
GS
V
G
-3mA
I
I
D
G
Charge
Current Sampling Resistors
Fig 14b. Gate Charge Test Circuit
Fig 14a. Basic Gate Charge Waveform
6
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