Test Circuits and Waveforms (Continued)
V
DS
V
Q
DD
g(TOT)
R
L
V
DS
V
= 20V
GS
Q
g(10)
V
GS
+
-
V
V
= 10V
DD
V
GS
GS
V
= 2V
DUT
GS
0
I
g(REF)
Q
g(TH)
Q
Q
gd
gs
I
g(REF)
0
Figure 16. Gate Charge Test Circuit
Figure 17. Gate Charge Waveforms
V
t
t
DS
ON
OFF
t
d(OFF)
t
d(ON)
t
t
f
R
L
r
V
DS
90%
90%
+
-
V
GS
V
DD
10%
10%
0
DUT
90%
50%
R
GS
V
GS
50%
PULSE WIDTH
10%
V
GS
0
Figure 18. Switching Time Test Circuit
Figure 19. Switching Time Waveforms
©2002 Fairchild Semiconductor Corporation
Rev. B