IRF9520
Test Circuits and Waveforms
V
DS
t
AV
L
VARY t
P
TO OBTAIN
REQUIRED PEAK I
AS
R
G
0
-
+
V
DD
V
DD
0V
V
GS
DUT
t
P
I
AS
0.01Ω
I
AS
t
P
BV
DSS
V
DS
FIGURE 15. UNCLAMPED ENERGY TEST CIRCUIT
FIGURE 16. UNCLAMPED ENERGY WAVEFORMS
t
ON
t
d(ON)
t
r
R
L
0
10%
t
OFF
t
d(OFF)
t
f
10%
DUT
V
GS
R
G
-
V
DD
+
V
DS
V
GS
0
90%
90%
10%
50%
PULSE WIDTH
90%
50%
FIGURE 17. SWITCHING TIME TEST CIRCUIT
-V
DS
(ISOLATED
SUPPLY)
0
DUT
12V
BATTERY
0.2µF
50kΩ
0.3µF
FIGURE 18. RESISTIVE SWITCHING WAVEFORMS
CURRENT
REGULATOR
V
DS
Q
gs
D
G
0
I
G(REF)
I
G
CURRENT
SAMPLING
RESISTOR
S
+V
DS
I
D
CURRENT
SAMPLING
RESISTOR
0
DUT
V
DD
Q
gd
Q
g(TOT)
V
GS
I
G(REF)
FIGURE 19. GATE CHARGE TEST CIRCUIT
FIGURE 20. GATE CHARGE WAVEFORMS
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