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| FQP4N90 Datasheet, PDF (5/8 Pages) Fairchild Semiconductor – 900V N-Channel MOSFET | |||
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Gate Charge Test Circuit & Waveform
VGS
Same Type
50KΩ
as DUT
Qg
12V
200nF
10V
300nF
VGS
VDS
Qgs
Qgd
DUT
3mA
Charge
10V
Resistive Switching Test Circuit & Waveforms
VDS
RG
RL
VDS
90%
VDD
( 0.5 rated VDS )
DUT
10%
Vin
td(on)
tr
t on
td(off)
tf
t off
Unclamped Inductive Switching Test Circuit & Waveforms
10V
VDS
ID
RG
L
DUT
EAS
=
--1--
2
LL IAS2
BVDSS
--------------------
BVDSS -- VDD
VDD
BVDSS
IAS
ID (t)
VDD
VDS (t)
tp
Time
©2001 Fairchild Semiconductor Corporation
Rev. B, October 2001
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