MC33030_06 ONSEMI [ON Semiconductor], MC33030_06 Datasheet - Page 9

• Manufacturer Part Number: MC33030_06
• Description: DC Servo Motor Controller/Driver
• Manufacturer: ONSEMI [ON Semiconductor]

Output Filter/
try to follow and center about the reference voltage setting
if it is within the input common−mode voltage range of
Pin 3; Figures 4 and 5. Initially consider that the feedback
input voltage level is somewhere on the dashed line between
V
defined above and the motor will be off. Now if the reference
voltage is raised so that V
will turn−on [3] enabling Q Drive, causing Drive Output A
to sink and B to source motor current [8]. The actuator will
move in Direction B until V
Comparator B will turn−off, activating the brake enable [4]
V
Error Amp
Input Filter
Feedback
Reference
V
CC
2
CC
It must be remembered that points V
Inverting
Output
and V
Input
Reference
Input
Input
Inverting
Non−
Input
4
in [1]. This is within the dead zone range as
8 20 k Error Amp
7
6
3
1
2
20 k
100 k
100 k
20 k
Detector
Window
+
mA
9
3.0 k
3.0 k
35
mA
35
20 k
Figure 17. Representative Block Diagram and Typical Servo Application
+
Input
Filter
Pin 3
Pin 3
0.3 mA
is less than V
becomes greater than V
B
A
4, 5,12,13
GND
1
through V
Gearbox and Linkage
4
, comparator B
18 V
Ref.
Current
4
Over−
Latch
Drive Brake Logic
Overvoltage
always
http://onsemi.com
Monitor
Direction
MC33030
Q
Q
1
Latch
Brake Enable
.
Q Drive
R
S
9
R
S
Q Drive
7.5 V
Overcurrent
Ref.
and Q Brake [6] causing Drive Output A to go high and B to
go into a high impedance state. The inertia of the mechanical
system will drive the motor as a generator creating a positive
voltage on Pin 10 with respect to Pin 14. The servo system
can be stopped quickly, so as not to over−shoot through the
dead zone range, by braking. This is accomplished by
shorting the motor/generator terminals together. Brake
current will flow into the diode at Drive Output B, through
the internal V
transistor at Drive Output A. The end of the solid line and
beginning of the dashed for V
resting position of the actuator after braking.
Q
Q
Delay
Q Brake
5.5
mA
Q Brake
C
50 k
16
DLY
CC
V
CC
11
rail, and out the emitter of the sourcing
Output B
Drive
+
R
15
OC
Pin 3
10
H−Switch
Power
Overcurrent
Reference
Motor
[1] indicates the possible
Drive
Output A
14
Overcurrent
Monitor
+