
HAF2001
9
I
I
L
R
V
= 5 V
HD74LS08
I
V
+
–
Test Circuit
Rg
DUT
0
I
D
5 A
Thermal shut down
V
I
0
I
I
0
3
1
0.3
0.1
0.03
0.01
10 μ
100 μ
1 m
10 m
Pulse Width PW (S)
N
100 m
1
10
s
γ
DM
P
PW
T
D =T
ch – c = 2.50 °C/W, Tc = 25 °C
θ γ θ
θ
Tc = 25°C
Normalized Transient Thermal Impedance vs. Pulse Width
D = 1
0.5
0.2
0.1
0.05
0.02
1sho puse
V Monitor
D.U.T.
V
5 V
R
L
V
= 30 V
tr
td(on)
90%
90%
10%
10%
Vout
td(off)
Vout
Monitor
50
90%
10%
t
f
Switching Time Test Circuit
Waveform
GS
V
GS