STB18N55M5, STD18N55M5, STF18N55M5, STP18N55M5
Test circuits
3
Test circuits
Figure 19. Gate charge test circuit
V
DD
12V
2200
Figure 18. Switching times test circuit for
resistive load
47kΩ
100nF
1kΩ
R
L
V
GS
V
D
R
G
P
W
D.U.T.
μF
3.3
μF
V
DD
V
i
=20V=V
GMAX
2200
μF
I
G
=CONST
100Ω
2.7kΩ
47kΩ
P
W
1kΩ
AM01469v1
D.U.T.
V
G
AM01468v1
Figure 20. Test circuit for inductive load
Figure 21. Unclamped inductive load test
switching and diode recovery times
circuit
A
D
G
S
B
25
Ω
D.U.T.
A
FAST
DIODE
B
A
L=100μH
B
D
G
3.3
μF
1000
μF
L
V
D
2200
μF
3.3
μF
V
DD
V
DD
I
D
R
G
S
V
i
D.U.T.
P
w
AM01470v1
AM01471v1
Figure 22. Unclamped inductive waveform
V
(BR)DSS
V
D
Figure 23. Switching time waveform
Concept waveform for Inductive Load Turn-off
Id
90%Vds
90%Id
Tdelay-off
-off
I
DM
Vgs
90%Vgs
on
I
D
Vgs(I(t))
))
V
DD
V
DD
Vds
10%Vds
10%Id
Trise
Tfall
AM01472v1
Tcross -
-over
AM05540v1
Doc ID 17078 Rev 2
9/22