P-CHANNEL
POWER MOSFET
Fig 12. Gate Charge Test Circuit & Waveform
SFF9240
“ Current Regulator ”
50KΩ
12V
200nF
300nF
Same Type
as DUT
V
GS
Q
g
-10V
V
DS
V
GS
DUT
-3mA
Q
gs
Q
gd
R
1
Current Sampling (I
G
)
Resistor
R
2
Current Sampling (I
D
)
Resistor
Charge
Fig 13. Resistive Switching Test Circuit & Waveforms
R
L
V
out
V
in
R
G
DUT
-10V
V
out
90%
t
on
t
off
t
r
t
d(off)
t
f
V
DD
( 0.5 rated V
DS
)
t
d(on)
V
in
10%
Fig 14. Unclamped Inductive Switching Test Circuit & Waveforms
L
L
V
DS
Vary t
p
to obtain
required peak I
D
BV
DSS
1
E
AS
= ---- L
L
I
AS2
--------------------
2
BV
DSS
-- V
DD
t
p
I
D
V
DD
Time
V
DS
(t)
R
G
DUT
-10V
t
p
C
V
DD
I
AS
BV
DSS
I
D
(t)