IRFR/U220N
80
60
40
20
0
I
D
TOP
1.2A
2.1A
BOTTOM 2.9A
1 5V
DRIVER
L
V
G
DS
D.U.T
R
+
V
D D
-
I
A
AS
20V
0.01
t
Ω
p
Fig 12a. Unclamped Inductive Test Circuit
25
50
75
100
125
150
175
V
(BR)DSS
°
Starting T , Junction Temperature ( C)
J
t
p
Fig 12c. Maximum Avalanche Energy
Vs. Drain Current
I
AS
Fig 12b. Unclamped Inductive Waveforms
Current Regulator
Same Type as D.U.T.
Q
G
50KΩ
.2µF
12V
.3µF
Q
Q
GD
GS
+
V
DS
D.U.T.
-
V
GS
V
G
3mA
I
I
D
G
Charge
Current Sampling Resistors
Fig 13a. Basic Gate Charge Waveform
Fig 13b. Gate Charge Test Circuit
6
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