IRFR/U3707
6 www.irf.com
Fig 13. On-Resistance Vs. Gate Voltage
Fig 12. On-Resistance Vs. Drain Current
Fig 15a&b. Unclamped Inductive Test Circuit
and Waveforms
Fig 15c. Maximum Avalanche Energy
Vs. Drain Current
D.U.T.
V
DS
I
D
I
G
3mA
V
GS
.3µF
50KΩ
.2µF
12V
Current Regulator
Same Type as D.U.T.
Current Sampling Resistors
+
-
V
GS
Q
G
Q
GS
Q
GD
V
G
Charge
t
p
V
BR
DSS
I
AS
R
G
I
AS
0.01
Ω
t
p
D.U.T
L
V
DS
+
-
V
DD
DRIVER
15V
20V
Fig 14a&b. Basic Gate Charge Test Circuit
and Waveforms
0 50 100 150 200 250
I
D
, Drain Current ( A )
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
R
DS ( on )
, Drain-to-Source On Resistance (
Ω
)
VGS = 4.5V
VGS = 10V
4.0 5.0 6.0 7.0 8.0 9.0 10.0
V
GS,
Gate -to -Source Voltage (V)
0.009
0.010
0.011
0.012
0.013
R
DS(on)
, Drain-to -Source On Resistance (
Ω
)
I
D
= 31A
25 50 75 100 125 150 175
0
100
200
300
400
500
600
Starting T , Junction Temperature ( C)
E , Single Pulse Avalanche Energy (mJ)
J
AS
°
I
D
TOP
BOTTOM
10.1A
20.7A
24.8A