IRFR420, IRFU420, SiHFR420, SiHFU420
Vishay Siliconix
R
D
V
DS
V
GS
R
G
D.U.T.
+
-
V
DD
10
V
Pulse
width
≤
1
µs
Duty factor
≤
0.1
%
Fig. 10a - Switching Time Test Circuit
V
DS
90
%
10
%
V
GS
t
d(on)
t
r
t
d(off)
t
f
Fig. 9 - Maximum Drain Current vs. Case Temperature
Fig. 10b - Switching Time Waveforms
Fig. 11 - Maximum Effective Transient Thermal Impedance, Junction-to-Case
L
Vary
t
p
to obtain
required I
AS
R
G
V
DS
t
p
V
DD
D.U.T.
I
AS
10
V
t
p
0.01
Ω
I
AS
Fig. 12b - Unclamped Inductive Waveforms
V
DS
+
-
V
DD
V
DS
Fig. 12a - Unclamped Inductive Test Circuit
Document Number: 91275
S-Pending-Rev. A, 21-Jul-08
www.vishay.com
5
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