STK672-120-SL-E
Figure 5 Hybrid IC internal average power dissipation, P - Motor current, I
OH
D
P
-- I
OH
D
18
16
14
12
10
8
V
=24V, V =5.0V
CC
DD
Clock=500Hz
Continuous 2-phase
excitation operation
Motor used: R=0.63Ω
L=0.62mH
The data are typical values.
6
4
2
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Motor current, I
OH
-- A
Figure 6 Substrate temperature rise, ΔTc - Hybrid IC internal average power dissipation, P
D
∆Tc -- P
With no heat sink, the IC vertical,
and convection cooling
D
80
70
60
50
40
30
20
10
0
0
0.5
1.0
1.5
2.0
2.5
3.0
Hybrid IC internal average power dissipation, P -- W
D
Figure 7 Heat sinkthermal resistance, θc-a - Heat sink area, S
S -- θc-a
100
7
5
3
2
W
10
i
t
h
n
o
s
u
r
f
7
W
a
c
e
i
t
h
a
f
i
b
n
i
s
5
l
a
c
h
i
k
n
g
s
u
r
f
a
c
e
3
2
f
i
n
i
s
h
i
n
g
1.0
2
3
5
7
2
3
5
7
10
100
1000
Heat sink area, S -- cm2
No. A2140-10/11
SANYO [ SANYO SEMICON DEVICE ]
