TCA0372
Figure 7. Sine Wave Reponse
Figure 8. Bidirectional DC Motor Control with
Microprocessor–Compatible Inputs
V
V
= +15 V
= –15 V
CC
EE
V
CC
A
R
= +100
= 50 Ω
V
L
+
–
+
–
E1
/2
E2
V
S
V
= Logic Supply Voltage
S
Must Have V
E1, E2 = Logic Inputs
> V
CC
S
t, TIME (100
µs/DIV)
Figure 9. Bidirectional Speed Control of DC Motors
V
S
R
0.1 µF
x
0.1 µF
10 k
10 k
R7
R8
V
R1
in
+
–
+
–
R3
5.0
10 k
Ω
R6
10 k
R2
R5
10 k
10 k
2R3
R1
For circuit stability, ensure that R
>
where, R = internal resistance of motor.
M
x
R
M
V
S
V
2 (V
–
)
|R |
I
M
The voltage available at the terminals of the motor is:
M
1
o
2
2R3 R1
where, |R | =
and I is the motor current.
M
o
R
x
THERMAL INFORMATION
The maximum power consumption an integrated circuit
can tolerate at a given operating ambient temperature can be
found from the equation:
This must be greater than the sum of the products of the
supply voltages and supply currents at the worst case
operating condition.
T
= Maximum operating junction temperature
as listed in the maximum ratings section.
= Maximum desired operating ambient
temperature.
J(max)
T
–T
J(max)
A
P
=
T
A
D(TA)
R
(typ)
θJA
R
= Typical thermal resistance junction–to–
ambient.
θJA(typ)
where, P
operating ambient temperature.
= power dissipation allowable at a given
D(TA)
4
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA [ MOTOROLA ]
