ON MC33030 Dc servo motor controller/driver Datasheet

MC33030
DC Servo Motor
Controller/Driver
The MC33030 is a monolithic DC servo motor controller providing
all active functions necessary for a complete closed loop system. This
device consists of an on−chip op amp and window comparator with
wide input common−mode range, drive and brake logic with direction
memory, Power H−Switch driver capable of 1.0 A, independently
programmable overcurrent monitor and shutdown delay, and
overvoltage monitor. This part is ideally suited for almost any servo
positioning application that requires sensing of temperature, pressure,
light, magnetic flux, or any other means that can be converted to a
voltage.
Although this device is primarily intended for servo applications, it
can be used as a switchmode motor controller.
http://onsemi.com
MARKING
DIAGRAMS
PDIP−16
P SUFFIX
CASE 648C
1
Features
•
•
•
•
•
•
•
•
16
MC33030P
AWLYYWWG
1
16
On−Chip Error Amp for Feedback Monitoring
Window Detector with Deadband and Self Centering Reference Input
Drive/Brake Logic with Direction Memory
1.0 A Power H−Switch
Programmable Overcurrent Detector
Programmable Overcurrent Shutdown Delay
Overvoltage Shutdown
Pb−Free Packages are Available*
1
SO−16W
DW SUFFIX
CASE 751G
MC33030DW
AWLYYWWG
1
A
WL
YY
WW
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
Reference
Input
Reference
Input Filter
Error Amp Output
Filter/Feedback Input
Overcurrent
Delay
15 Overcurrent
Reference
Driver
14
Output A
1
16
2
3
4
13
5
12
6
11 VCC
7
10
8
9
GND
GND
Error Amp
Output
Error Amp
Inverting Input
Error Amp Non−
Inverting Input
Driver
Output B
Error Amp
Input Filter
(Top View)
Pins 4, 5, 12 and 13 are electrical
ground and heat sink pins for IC.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2006
June, 2006 − Rev. 6
1
Publication Order Number:
MC33030/D
MC33030
Motor
VCC
VCC
11
9
Feedback
Position 8
+
7
Error Amp
−
6
Over−
Voltage
Monitor
+
+
Window
Detector
+
Power
H−Switch
Drive/
Brake
Logic
−
3
VCC
14
10
Programmable
Over−
Current
Detector
& Latch
+
−
Direction
Memory
Reference
Position 1
2
4, 5, 12, 13
16
CDLY
15
ROC
This device contains 119 active transistors.
Representative Block Diagram
ORDERING INFORMATION
Package
Shipping †
MC33030DW
SOIC−16
47 Units / Rail
MC33030DWG
SOIC−16
(Pb−Free)
MC33030DWR2
SOIC−16
MC33030DWR2G
SOIC−16
(Pb−Free)
MC33030P
PDIP−16
MC33030PG
PDIP−16
(Pb−Free)
Device
1000 / Tape & Reel
25 Units / Rail
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
http://onsemi.com
2
MC33030
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Power Supply Voltage
VCC
36
V
Input Voltage Range
Op Amp, Comparator, Current Limit
(Pins 1, 2, 3, 6, 7, 8, 9, 15)
VIR
−0.3 to VCC
V
VIDR
−0.3 to VCC
V
Input Differential Voltage Range
Op Amp, Comparator (Pins 1, 2, 3, 6, 7, 8, 9)
Delay Pin Sink Current (Pin 16)
IDLY(sink)
20
mA
Output Source Current (Op Amp)
Isource
10
mA
Drive Output Voltage Range (Note 1)
VDRV
−0.3 to (VCC + VF)
V
Drive Output Source Current (Note 2)
IDRV(source)
1.0
A
IDRV(sink)
1.0
A
IF
1.0
A
Drive Output Sink Current (Note 2)
Brake Diode Forward Current (Note 2)
°C/W
Power Dissipation and Thermal Characteristics
P Suffix, Dual In Line Case 648C
Thermal Resistance, Junction−to−Air
Thermal Resistance, Junction−to−Case
(Pins 4, 5, 12, 13)
DW Suffix, Dual In Line Case 751G
Thermal Resistance, Junction−to−Air
Thermal Resistance, Junction−to−Case
(Pins 4, 5, 12, 13)
RqJA
RqJC
80
15
RqJA
RqJC
94
18
TJ
+150
°C
Operating Junction Temperature
Operating Ambient Temperature Range
TA
−40 to + 85
°C
Storage Temperature Range
Tstg
−65 to +150
°C
Electrostatic Discharge Sensitivity (ESD)
Human Body Model (HBM)
Machine Model (MM)
ESD
V
2000
200
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. The upper voltage level is clamped by the forward drop, VF, of the brake diode.
2. These values are for continuous DC current. Maximum package power dissipation limits must be observed.
ELECTRICAL CHARACTERISTICS (VCC = 14 V, TA = 25°C, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
Input Offset Voltage (− 40°C p TA p 85°C), VPin 6 = 7.0 V, RL = 100 k
VIO
−
1.5
10
mV
Input Offset Current (VPin 6 = 1.0 V, RL = 100 k)
IIO
−
0.7
−
nA
Input Bias Current (VPin 6 = 7.0 V, RL = 100 k)
IIB
−
7.0
−
nA
VICR
−
0 to (VCC − 1.2)
−
V
SR
−
0.40
−
V/ms
fc
−
550
−
kHz
ERROR AMP
Input Common−Mode Voltage Range
DVIO = 20 mV, RL = 100 k
Slew Rate, Open Loop (VID = 0.5 V, CL = 15 pF)
Unity−Gain Crossover Frequency
φm
−
63
−
deg
Common−Mode Rejection Ratio (VPin 6 = 7.0 V, RL = 100 k)
CMRR
50
82
−
dB
Power Supply Rejection Ratio VCC = 9.0 to 16 V, VPin 6 = 7.0 V, RL = 100 k
PSRR
−
89
−
dB
Output Source Current (VPin 6 = 12 V)
IO +
−
1.8
−
mA
Output Sink Current (VPin 6 = 1.0 V)
IO −
−
250
−
mA
Output Voltage Swing (RL = 17 k to Ground)
VOH
VOL
12.5
−
13.1
0.02
−
−
V
V
Unity−Gain Phase Margin
http://onsemi.com
3
MC33030
ELECTRICAL CHARACTERISTICS (continued) (VCC = 14 V, TA = 25°C, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
VH
25
35
45
mV
Input Dead Zone Range (V2 − V4, Figure 18)
VIDZ
166
210
254
mV
Input Offset Voltage ( ⎢[V2 − VPin 2] − [VPin 2 − V4] ⎟ Figure 18)
VIO
−
25
−
mV
Input Functional Common−Mode Range (Note 3)
Upper Threshold
Lower Threshold
VIH
VIL
−
−
(VCC − 1.05)
0.24
−
−
VRSC
−
(1/2 VCC)
−
V
tp(IN/DRV)
−
2.0
−
ms
ROC
3.9
4.3
4.7
V
IDLY(source)
−
5.5
6.9
mA
−
−
−
0.1
0.7
16.5
−
−
−
−
0.3
0.4
6.8
5.5
7.5
6.0
8.2
6.5
tp(DLY/DRV)
−
1.8
−
VOH(DRV)
VOL(DRV)
(VCC − 2)
−
(VCC − 0.85)
0.12
−
1.0
tr
tf
−
−
200
200
−
−
VF
−
1.04
2.5
V
ICC
−
14
25
mA
Vth(OV)
16.5
18
20.5
V
VH(OV)
0.3
0.6
1.0
V
VCC
−
7.5
8.0
V
WINDOW DETECTOR
Input Hysteresis Voltage (V1 − V4, V2 − V3, Figure 18)
V
Reference Input Self Centering Voltage
Pins 1 and 2 Open
Window Detector Propagation Delay
Comparator Input, Pin 3, to Drive Outputs
VID = 0.5 V, RL(DRV) = 390 W
OVERCURRENT MONITOR
Overcurrent Reference Resistor Voltage (Pin 15)
Delay Pin Source Current
VDLY = 0 V, ROC = 27 k, IDRV = 0 mA
Delay Pin Sink Current (ROC = 27 k, IDRV = 0 mA)
VDLY = 5.0 V
VDLY = 8.3 V
VDLY = 14 V
IDLY(sink)
Delay Pin Voltage, Low State (IDLY = 0 mA)
VOL(DLY)
Overcurrent Shutdown Threshold
VCC = 14 V
VCC = 8.0 V
mA
Vth(OC)
Overcurrent Shutdown Propagation Delay
Delay Capacitor Input, Pin 16, to Drive Outputs, VID = 0.5 V
V
V
ms
POWER H−SWITCH
Drive−Output Saturation (− 40°C p TA p+ 85°C, Note 4)
High−State
(Isource = 100 mA)
Low−State
(Isink = 100 mA)
V
Drive−Output Voltage Switching Time (CL = 15 pF)
Rise Time
Fall Time
ns
Brake Diode Forward Voltage Drop (IF = 200 mA, Note 4)
TOTAL DEVICE
Standby Supply Current
Overvoltage Shutdown Threshold
(− 40°C p TA p + 85°C)
Overvoltage Shutdown Hysteresis (Device “off” to “on”)
Operating Voltage Lower Threshold
(− 40°C p TA p + 85°C)
3. The upper or lower hysteresis will be lost when operating the Input, Pin 3, close to the respective rail. Refer to Figure 4.
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
http://onsemi.com
4
DVIO = 20 mV
RL = 100 k
Vsat, OUTPUT SATURATION VOLTAGE (V)
0
VCC
− 400
− 800
800
400
0
− 55
GND
− 25
0
25
50
75
100
125
0
VCC
− 1.0
− 2.0
Source Saturation
RL to GND
TA = 25°C
Sink Saturation
RL to VCC
TA = 25°C
2.0
1.0
GND
0
30
100
1.0 k
3.0 k
IL, LOAD CURRENT (± mA)
Figure 1. Error Amp Input Common−Mode
Voltage Range versus Temperature
Figure 2. Error Amp Output Saturation
versus Load Current
0
80
0
Max. Pin 2 VICR so
that Pin 3 can change
state of drive outputs.
− 0.5
45
60
Gain
− 1.0
VCC
− 1.5
Phase
90
40
VCC = 14
Vout = 7.0 V
20 R = 100 k
L
CL = 40 pF
TA = 25°C
0
1.0
10
Phase
Margin
= 63°
100
1.0 k
10 k
135
180
1.0 M
100 k
0.3
0.2
0.1
GND
0
− 55
− 25
f, FREQUENCY (Hz)
Vsat, OUTPUT SATURATION VOLTAGE (V)
V2
Upper Hysteresis
7.05
V3
VCC = 14 V
Pin 2 = 7.00 V
7.00
6.95
V1
Lower Hysteresis
6.90
6.85
− 55
− 25
0
25
50
25
50
75
100
125
Figure 4. Window Detector Reference−Input
Common−Mode Voltage Range
versus Temperature
7.15
7.10
0
TA, AMBIENT TEMPERATURE (°C)
Figure 3. Open Loop Voltage Gain and
Phase versus Frequency
VFB, FEEDBACK−INPUT VOLTAGE (V)
300
TA, AMBIENT TEMPERATURE (°C)
φ, EXCESS PHASE (DEGREES)
VICR, INPUT COMMON−MODE RANGE (V)
AVOL, OPEN−LOOP VOLTAGE GAIN (dB)
VICR, INPUT COMMON−MODE RANGE (mV)
MC33030
V4
75
100
125
0
Source Saturation
RL to GND
TA = 25°C
VCC
− 1.0
1.0
0
0
Sink Saturation
RL = VCC
TA = 25°C
200
GND
400
600
IL, LOAD CURRENT (± mA)
TA, AMBIENT TEMPERATURE (°C)
Figure 5. Window Detector Feedback−Input
Thresholds versus Temperature
Figure 6. Output Driver Saturation
versus Load Current
http://onsemi.com
5
800
TA = 25°C
400
300
200
100
0.7
0.9
1.1
1.5
1.3
600
400
200
0
0
20
40
60
80
Figure 8. Output Source Current−Limit versus
Overcurrent Reference Resistance
VCC = 14 V
ROC = 27 k
200
ROC = 68 k
− 25
0
25
50
75
100
125
IDLY, DELAY PIN SOURCE CURRENT
(NORMALIZED)
Figure 7. Brake Diode Forward Current
versus Forward Voltage
400
1.04
1.00
0.96
0.92
VCC = 14 V
0.88
− 55
− 25
0
25
50
75
100
TA, AMBIENT TEMPERATURE (°C)
TA, AMBIENT TEMPERATURE (°C)
Figure 9. Output Source Current−Limit
versus Temperature
Figure 10. Normalized Delay Pin Source
Current versus Temperature
125
28
1.04
1.02
1.00
0.98
VCC = 14 V
0.96
− 55
100
ROC, OVERCURRENT REFERENCE RESISTANCE (kW)
ROC = 15 k
0
− 55
VCC = 14 V
TA = 25°C
VF, FORWARD VOLTAGE (V)
600
Vth(OC), OVERCURRENT DELAY THRESHOLD
VOLTAGE (NORMALIZED)
Isource, OUTPUT SOURCE CURRENT (mA)
0
0.5
800
ICC, SUPPLY CURRENT (mA)
IF, FORWARD CURRENT (mA)
500
Isource, OUTPUT SOURCE CURRENT (mA)
MC33030
24
20
Pins 6 to 7
Pins 2 to 8
TA = 25°C
16
12
Minimum
Operating
Voltage
Range
8.0
4.0
0
− 25
0
25
50
75
100
125
0
8.0
16
Over−
Voltage
Shutdown
Range
24
32
VCC, SUPPLY VOLTAGE (V)
TA, AMBIENT TEMPERATURE (°C)
Figure 11. Normalized Overcurrent Delay
Threshold Voltage versus Temperature
Figure 12. Supply Current versus
Supply Voltage
http://onsemi.com
6
40
0.98
0.96
− 25
0
25
50
75
100
125
TA, AMBIENT TEMPERATURE (°C)
Figure 13. Normalized Overvoltage Shutdown
Threshold versus Temperature
RqJA, THERMAL RESISTANCE
JUNCTION−TO−AIR (°C/W)
100
1.2
1.0
0.8
0.6
0.4
− 55
− 25
0
RqJA
60
2.0 oz
Copper
L
3.0 mm
Graphs represent symmetrical layout
40
0
5.0
4.0
3.0
2.0
PD(max) for TA = 70°C
20
0
10
20
30
1.0
0
50
40
L, LENGTH OF COPPER (mm)
Figure 15. P Suffix (DIP−16) Thermal
Resistance and Maximum Power Dissipation
versus P.C.B. Copper Length
100
2.8
PD(max) for TA = 50°C
90
2.4
80
ÎÎÎÎ
ÎÎÎ
ÎÎÎÎ
ÎÎÎ
ÎÎÎ
ÎÎÎÎÎÎÎ
Graph represents symmetrical layout
70
2.0 oz.
Copper
L
60
L
50
RqJA
40
3.0 mm
10
2.0
1.6
1.2
0.8
0.4
30
0
20
30
40
L, LENGTH OF COPPER (mm)
Figure 16. DW Suffix (SOP−16L) Thermal
Resistance and Maximum Power Dissipation
versus P.C.B. Copper Length
http://onsemi.com
7
75
100
125
Figure 14. Normalized Overvoltage Shutdown
Hysteresis versus Temperature
ÎÎÎ
ÎÎ
ÎÎÎÎÎ
L
50
TA, AMBIENT TEMPERATURE (°C)
Printed circuit board heatsink example
80
25
0
50
PD, MAXIMUM POWER DISSIPATION (W)
− 55
1.4
PD, MAXIMUM POWER DISSIPATION (W)
1.00
Vth(OV), OVERVOLTAGE SHUTDOWN THRESHOLD
(NORMALIZED)
1.02
RqJA, THERMAL RESISTANCE
JUNCTION−TO−AIR (°C/W)
Vth(OV), OVERVOLTAGE SHUTDOWN THRESHOLD
(NORMALIZED)
MC33030
MC33030
OPERATING DESCRIPTION
The MC33030 was designed to drive fractional horsepower
DC motors and sense actuator position by voltage feedback.
A typical servo application and representative internal block
diagram are shown in Figure 17. The system operates by
setting a voltage on the reference input of the Window
Detector (Pin 1) which appears on (Pin 2). A DC motor then
drives a position sensor, usually a potentiometer driven by
a gear box, in a corrective fashion so that a voltage
proportional to position is present at Pin 3. The servo motor
will continue to run until the voltage at Pin 3 falls within the
dead zone, which is centered about the reference voltage.
The Window Detector is composed of two comparators,
A and B, each containing hysteresis. The reference input,
common to both comparators, is pre−biased at 1/2 VCC for
simple two position servo systems and can easily be
overridden by an external voltage divider. The feedback
voltage present at Pin 3 is connected to the center of two
resistors that are driven by an equal magnitude current
source and sink. This generates an offset voltage at the input
of each comparator which is centered about Pin 3 that can
float virtually from VCC to ground. The sum of the upper and
lower offset voltages is defined as the window detector input
dead zone range.
To increase system flexibility, an on−chip Error Amp is
provided. It can be used to buffer and/or gain−up the actuator
position voltage which has the effect of narrowing the dead
zone range. A PNP differential input stage is provided so that
the input common−mode voltage range will include ground.
The main design goal of the error amp output stage was to
be able to drive the window detector input. It typically can
source 1.8 mA and sink 250 mA. Special design
considerations must be made if it is to be used for other
applications.
The Power H−Switch provides a direct means for motor
drive and braking with a maximum source, sink, and brake
current of 1.0 A continuous. Maximum package power
dissipation limits must be observed. Refer to Figure 15 for
thermal information. For greater drive current requirements,
a method for buffering that maintains all the system features
is shown in Figure 30.
The Overcurrent Monitor is designed to distinguish
between motor startup or locked rotor conditions that can
occur when the actuator has reached its travel limit. A
fraction of the Power H−Switch source current is internally
fed into one of the two inverting inputs of the current
comparator, while the non−inverting input is driven by a
programmable current reference. This reference level is
controlled by the resistance value selected for ROC, and must
be greater than the required motor run−current with its
mechanical load over temperature; refer to Figure 8. During
an overcurrent condition, the comparator will turn off and
allow the current source to charge the delay capacitor, CDLY.
When CDLY charges to a level of 7.5 V, the set input of the
overcurrent latch will go high, disabling the drive and brake
functions of the Power H−Switch. The programmable time
delay is determined by the capacitance value−selected for
CDLY.
t
DLY
+
V
I
C
DLY + 7.5 C DLY + 1.36 C
in μF
DLY
5.5 μA
DLY(source)
ref
This system allows the Power H−Switch to supply motor
startup current for a predetermined amount of time. If the
rotor is locked, the system will time−out and shutdown. This
feature eliminates the need for servo end−of−travel or limit
switches. Care must be taken so as not to select too large of
a capacitance value for CDLY. An overcurrent condition for
an excessively long time−out period can cause the integrated
circuit to overheat and eventually fail. Again, the maximum
package power dissipation limits must be observed. The
overcurrent latch is reset upon powerup or by readjusting
VPin 2 as to cause VPin 3 to enter or pass through the dead
zone. This can be achieved by requesting the motor to
reverse direction.
An Overvoltage Monitor circuit provides protection for
the integrated circuit and motor by disabling the Power
H−Switch functions if VCC should exceed 18 V. Resumption
of normal operation will commence when VCC falls below
17.4 V.
A timing diagram that depicts the operation of the
Drive/Brake Logic section is shown in Figure 18. The
waveforms grouped in [1] show a reference voltage that was
preset, appearing on Pin 2, which corresponds to the desired
actuator position. The true actuator position is represented
by the voltage on Pin 3. The points V1 through V4 represent
the input voltage thresholds of comparators A and B that
cause a change in their respective output state. They are
defined as follows:
V1 = Comparator B turn−off threshold
V2 = Comparator A turn−on threshold
V3 = Comparator A turn−off threshold
V4 = Comparator B turn−on threshold
V1−V4 = Comparator B input hysteresis voltage
V2−V3 = Comparator A input hysteresis voltage
V2−V4 = Window detector input dead zone range
|(V2−VPin2) − (VPin2 − V4)| = Window detector input voltage
http://onsemi.com
8
MC33030
It must be remembered that points V1 through V4 always
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
V2 and V4 in [1]. This is within the dead zone range as
defined above and the motor will be off. Now if the reference
voltage is raised so that VPin 3 is less than V4, comparator B
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 VPin 3 becomes greater than V1.
Comparator B will turn−off, activating the brake enable [4]
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 VCC rail, and out the emitter of the sourcing
transistor at Drive Output A. The end of the solid line and
beginning of the dashed for VPin 3 [1] indicates the possible
resting position of the actuator after braking.
VCC
Motor
Gearbox and Linkage
VCC
Non−
Inverting
Input
Drive
Output B
Input
Filter
9
10
11
Drive
Output A
14
+
8 20 k Error Amp
Inverting
Input
7 20 k
Output
6
Overvoltage
Monitor
18 V
Ref.
0.3 mA
Drive Brake Logic
+
20 k
Q Drive
35
mA
B
Q Brake
R
Error Amp
Output Filter/
Feedback
Input
3.0 k
3
Direction
Latch
3.0 k
A
Power
H−Switch
Q Brake
S
Q
Q Drive
35
mA
VCC
Q
Brake Enable
+
Reference
Input
1 100 k
20 k
Q
Over−
Current
Latch
100 k
2
Reference
Input Filter
R
5.5
mA
Q
50 k
S
+
7.5 V
Ref.
Window
Detector
4, 5,12,13
Overcurrent
Delay
GND
Overcurrent
Monitor
16
CDLY
15 Overcurrent
ROC Reference
Figure 17. Representative Block Diagram and Typical Servo Application
http://onsemi.com
9
MC33030
Thus far, the operating description has been limited to
servo systems in which the motor mechanically drives a
potentiometer for position sensing. Figures 19, 20, 27, and
31 show examples that use light, magnetic flux, temperature,
and pressure as a means to drive the feedback element.
Figures 21, 22 and 23 are examples of two position, open
loop servo systems. In these systems, the motor runs the
actuator to each end of its travel limit where the Overcurrent
Monitor detects a locked rotor condition and shuts down the
drive. Figures 32 and 33 show two possible methods of using
the MC33030 as a switching motor controller. In each
example a fixed reference voltage is applied to Pin 2. This
causes Vpin 3 to be less than V4 and Drive Output A, Pin 14,
to be in a low state saturating the TIP42 transistor. In
Figure 32, the motor drives a tachometer that generates an
ac voltage proportional to RPM. This voltage is rectified,
filtered, divided down by the speed set potentiometer, and
applied to Pin 8. The motor will accelerate until VPin 3 is
equal to V1 at which time Pin 14 will go to a high state and
terminate the motor drive. The motor will now coast until
VPin 3 is less than V4 where upon drive is then reapplied. The
system operation of Figure 31 is identical to that of
Figure 32 except the signal at Pin 3 is an amplified average
of the motors drive and back EMF voltages. Both systems
exhibit excellent control of RPM with variations of VCC;
however, Figure 32 has somewhat better torque
characteristics at low RPM.
If VPin 3 should continue to rise and become greater than
V2, the actuator will have over shot the dead zone range and
cause the motor to run in Direction A until VPin 3 is equal to
V3. The Drive/Brake behavior for Direction A is identical to
that of B. Overshooting the dead zone range in both
directions can cause the servo system to continuously hunt
or oscillate. Notice that the last motor run−direction is stored
in the direction latch. This information is needed to
determine whether Q or Q Brake is to be enabled when
VPin 3 enters the dead zone range. The dashed lines in [8,9]
indicate the resulting waveforms of an overcurrent
condition that has exceeded the programmed time delay.
Notice that both Drive Outputs go into a high impedance
state until VPin 2 is readjusted so that VPin 3 enters or crosses
through the dead zone [7, 4].
The inputs of the Error Amp and Window Detector can be
susceptible to the noise created by the brushes of the DC
motor and cause the servo to hunt. Therefore, each of these
inputs are provided with an internal series resistor and are
pinned out for an external bypass capacitor. It has been
found that placing a capacitor with short leads directly
across the brushes will significantly reduce noise problems.
Good quality RF bypass capacitors in the range of 0.001 to
0.1 mF may be required. Many of the more economical
motors will generate significant levels of RF energy over a
spectrum that extends from DC to beyond 200 MHz. The
capacitance value and method of noise filtering must be
determined on a system by system basis.
http://onsemi.com
10
MC33030
Comparator A
Non Inverting Input
Threshold
Window
Detector
V2
V3
Reference Input Voltage
(Desired Actuator
Position)
Comparator B
Inverting Input
Threshold
[1]
V1
V4
Feedback Input
(True Actuator
Position)
[2]
Comparator
A Output
Comparator
B Output
[3]
[4]
Brake Enable
Direction Latch
Q Output
[5]
Direction Latch
Q Output
Drive/Brake
Logic
Q Brake
[6]
Q Brake
[7]
Overcurrent
Latch Reset Input
Source
Drive
Output A
High Z
Sink
Power
H−Switch
[8]
Source
Drive
Output B
Overcurrent
Monitor
High Z
Sink
7.5 V
[9]
CDLY
Direction B
Feedback Input
less than V1
Dead Zone
Feedback Input
between V1 & V2
Direction A
Feedback Input
greater than V2
Figure 18. Timing Diagram
http://onsemi.com
11
Dead Zone
Feedback Input
between V3 & V4
Direction B
Feedback Input
less than V4
MC33030
R1, R2 − Cadium Sulphide Photocell
R1, R2 − 5M Dark, 3.0 k light resistance
VCC
≈15°
Offset
Zero Flux
Centering
20 k
R3 − 30 k, repositions servo during
R3 − darkness for next sunrise.
R1
9
8 20 k
R3
R2
7
Servo Driven
Wheel
Error Amp
+
Linear
Hall
Effect
Sensor
−
20 k
6
VCC
9
VCC
3.9 k
TL173C
Error Amp
8 20 k
7
10 k
20 k
6
B
Gain
VCC
1
Centering
Adjust
10 k
Typical sensitivity with gain set at 3.9 k is 1.5 mV/gauss.
Servo motor controls magnetic field about sensor.
Figure 19. Solar Tracking Servo System
Figure 20. Magnetic Sensing Servo System
VCC
470
MRD3056
Latch
Drive A
9
39 k
MRD3056
Latch
Drive B
8
7
VCC
Error Amp
20 k
1
0
20 k
68 k
9
Input
MPS
A20
8
7
Error Amp
20 k
20 k
470
VCC/2
6
1 − Activates Drive A
0 − Activates Drive B
1
Overcurrent Monitor (not shown) shuts down
servo when end stop is reached.
Overcurrent Monitor (not shown) shuts down
servo when end stop is reached.
Figure 21. Infrared Latched Two Position
Servo System
Figure 22. Digital Two Position Servo System
9
VCC
Vin
R
R
C1
C2
9
6
100 k
8 20 k
7
100 k
22
Ǹ
Error Amp
1
R 2C 1C 2
20 k
100 k
130 k
f o +
6
2p
Ǹ
Error Amp
20 k
R = 1.0 M
C1 = 1000 pF
C2 = 100 pF
C1
+ R
C
8 20 k
7
f [ 0.72
RC
Rq20k
C2
Q +
Figure 23. 0.25 Hz Square−Wave
Servo Agitator
2
Figure 24. Second Order Low−Pass Active Filter
http://onsemi.com
12
MC33030
9
9
R
Vin
R
20 k
8
7
2C
+
−
VA
Error Amp
20 k
f
notch
Error Amp
−
20 k
R3
VB
R4
C
+
+
7
R2
6
R/2
C
8 20 k
R1
1
2pRC
V
For 60 Hz R = 53.6 k, C = 0.05
Figure 25. Notch Filter
Pin6
6
+V
ǒ
Ǔ ǒ Ǔ
R 3 ) R4 R
2 – R 4 V
A R )R R
R3 B
3
1
2
Figure 26. Differential Input Amplifier
VCC
Cabin
Temperature
Sensor
T
9
R1
8
20 k
7
20 k
R2
R3
R4
+
VRef
Error Amp
−
V
V Pin6 +
1
R2
R1
R
8
20 k
+
7
R2
R3
VA
ǒ Ǔ
ǒ
VB
R
R4
)1
CC R
3
R1
R
6
VCC
Set
Temperature
9
R + DR
20 k
R4
ǒ
Error Amp
−
6
Ǔ
DR
V *V +V A
B
Ref 4R ) 2DR
Ǔ
)1
R 1 + R3, R 2 + R4, R 1 uu R
R
V Pin6 + 4 (VA–VB)
R3
In this application the servo motor drives the
heat/air conditioner modulator door in a duct system.
Figure 27. Temperature Sensing Servo System
Figure 28. Bridge Amplifier
VCC
Q
R
VF(D ) ) VF(D )–VBE(ON)
1
2
R [
E
IMOTOR–IDRV(max)
+
O.C.
Q
S
7.5 V
+
16
CDLY
RE
D1 D2
15
ROC
4.7 k
Motor
RE
D1 D2
VCC
17
8
4
A
2
3
Vin
VRef
LM311
From Drive
Outputs
470
B
This circuit maintains the brake and overcurrent
features of the MC33030. Set ROC to 15 k for
IDRV(max) ≈ 0.5 A.
A direction change signal is required at Pins 2 or 3 to
reset the overcurrent latch.
Figure 29. Remote Latched Shutdown
Figure 30. Power H−Switch Buffer
http://onsemi.com
13
MC33030
Gas Flow
VCC = 12 V
6.2 k
1.76 k
Zero Pressure 2.0 k
Offset Adjust
12 k
5.1 k
LM324 Quad
Op Amp
1.0 k
8.06 k
200
S−
5.1 k
MPX11DP
Silicon
Pressure
Sensor
200
20 k
Gain
1.0 k
Pressure
Port
4.12 k
2.4 k
S+
Vacuum
Port
1.0 k
2.0 V for Zero
Pressure Differential
VCC = 12 V
0.01
6.0 V for 100 kPa
(14.5 PSI)
Pressure Differential
Motor
9
11
10
14
8
7
6
+
B
R Q
3
DIR.
S Q
A
12 V
+
Pressure
Differential
Reference Set
5.1 k
5.0 k
+
1
Q R
O.C.
1.8 k
0.01 2
Q
S
4, 5,12,13
+
16
0.01
Figure 31. Adjustable Pressure Differential Regulator
http://onsemi.com
14
15
15 k
+
MC33030
VCC = 12 V
+
100
100
0.24
100
0.002
TACH
Speed
Set
1N4001
+ 10 k
1.0
TIP42
11
9
10
14
+
10
+
1.0 k
MPS
A70
Motor
8
7
6
MZ2361
+
RQ
3
DIR.
S Q
+
12 V
+
1
Overcurrent
Reset
QR
O.C.
Q S
4.7 k
2
+
1N753
15
16
4, 5,12,13
30 k
1.0 k
Figure 32. Switching Motor Controller With Buffered Output and Tach Feedback
VCC = 12 V
100
+
Speed
Set
1.0
0.24 10
100
100
1.0
TIP42
11
9
10
14
2X−1N4001
+
8
10 k
10 k
+
+
7
10 k
20 k 6
+
RQ
3
DIR.
SQ
+
+
1
+ 12 V
Overcurrent
Reset
Q R
O.C.
Q S
2
+
1N753
16
1.0 k
4, 5, 12, 13
15
30 k
Figure 33. Switching Motor Controller With Buffered Output and Back EMF Sensing
http://onsemi.com
15
+
1.0 k
MPS
A70
Motor
MC33030
PACKAGE DIMENSIONS
PDIP−16
P SUFFIX
CASE 648C−04
ISSUE D
A
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
DIM
A
B
C
D
E
F
G
J
K
L
M
N
INCHES
MIN
MAX
0.744
0.783
0.240
0.260
0.145
0.185
0.015
0.021
0.050 BSC
0.040
0.70
0.100 BSC
0.008
0.015
0.115
0.135
0.300 BSC
0_
10_
0.015
0.040
MILLIMETERS
MIN
MAX
18.90
19.90
6.10
6.60
3.69
4.69
0.38
0.53
1.27 BSC
1.02
1.78
2.54 BSC
0.20
0.38
2.92
3.43
7.62 BSC
0_
10_
0.39
1.01
K
C
N
F
0.005 (0.13)
J
8
16X
1
L
9
B
16
M
M
T B
B
A
T
E
G
16X
SEATING
PLANE
D
0.005 (0.13)
M
T A
SO−16 WB
CASE 751G−03
ISSUE C
A
D
9
1
8
16X
M
14X
e
T A
S
B
h X 45 _
S
L
A
0.25
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.
3. DIMENSIONS D AND E DO NOT INLCUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.13 TOTAL IN
EXCESS OF THE B DIMENSION AT MAXIMUM
MATERIAL CONDITION.
MILLIMETERS
DIM MIN
MAX
A
2.35
2.65
A1 0.10
0.25
B
0.35
0.49
C
0.23
0.32
D 10.15 10.45
E
7.40
7.60
e
1.27 BSC
H 10.05 10.55
h
0.25
0.75
L
0.50
0.90
q
0_
7_
B
B
A1
H
E
0.25
8X
M
B
M
16
q
SEATING
PLANE
T
C
http://onsemi.com
16
MC33030
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada
Email: [email protected]
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5773−3850
http://onsemi.com
17
ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your local
Sales Representative
MC33030/D