Datasheet

IRF7478PbF
6 www.irf.com
Fig 13. On-Resistance Vs. Gate Voltage
Fig 12. On-Resistance Vs. Drain Current
Fig 14a&b. Basic Gate Charge Test Circuit
and Waveform
Fig 15a&b. Unclamped Inductive Test circuit
and Waveforms
Fig 15c. Maximum Avalanche Energy
Vs. Drain Current
D.U.T.
V
D
S
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
A
15V
20V
25 50 75 100 125 15
0
0
100
200
300
400
Starting T , Junction Temperature ( C)
E , Single Pulse Avalanche Energy (mJ)
J
AS
°
I
D
TOP
BOTTOM
1.9A
3.4A
4.2A
0 102030405060
I
D
, Drain Current (A)
0.016
0.018
0.020
0.022
0.024
0.026
0.028
R
D
S
(
o
n
)
,
D
r
a
i
n
-
t
o
-
S
o
u
r
c
e
O
n
R
e
s
i
s
t
a
n
c
e
(
Ω
)
V
GS
= 10V
V
GS
= 4.5V
0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0
V
GS,
Gate -to -Source Voltage (V)
0.01
0.02
0.03
0.04
R
D
S
(
o
n
)
,
D
r
a
i
n
-
t
o
-
S
o
u
r
c
e
O
n
R
e
s
i
s
t
a
n
c
e
(
Ω
)
I
D
= 7.0A