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What is MC33033?

This electronic component, produced by the manufacturer "Motorola Semiconductors", performs the same function as "BRUSHLESS DC MOTOR CONTROLLER".


MC33033 Datasheet PDF - Motorola Semiconductors

Part Number MC33033
Description BRUSHLESS DC MOTOR CONTROLLER
Manufacturers Motorola Semiconductors 
Logo Motorola Semiconductors Logo 


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Brushless DC
Motor Controller
The MC33033 is a high performance second generation, limited feature,
monolithic brushless dc motor controller which has evolved from Motorolas
full featured MC33034 and MC33035 controllers. It contains all of the active
functions required for the implementation of open loop, three or four phase
motor control. The device consists of a rotor position decoder for proper
commutation sequencing, temperature compensated reference capable of
supplying sensor power, frequency programmable sawtooth oscillator, fully
accessible error amplifier, pulse width modulator comparator, three open
collector top drivers, and three high current totem pole bottom drivers ideally
suited for driving power MOSFETs. Unlike its predessors, it does not feature
separate drive circuit supply and ground pins, brake input, or fault output
signal.
Included in the MC33033 are protective features consisting of
undervoltage lockout, cycle–by–cycle current limiting with a selectable time
delayed latched shutdown mode, and internal thermal shutdown.
Typical motor control functions include open loop speed, forward or
reverse direction, and run enable.The MC33033 is designed to operate
brushless motors with electrical sensor phasings of 60°/300° or 120°/240°,
and can also efficiently control brush dc motors.
10 to 30 V Operation
Undervoltage Lockout
6.25 V Reference Capable of Supplying Sensor Power
Fully Accessible Error Amplifier for Closed Loop Servo Applications
High Current Drivers Can Control External 3–Phase MOSFET Bridge
Cycle–By–Cycle Current Limiting
Internal Thermal Shutdown
Selectable 60°/300° or 120°/240° Sensor Phasings
Also Efficiently Control Brush DC Motors with External MOSFET
H–Bridge
Device
MC33033DW
MC33033P
ORDERING INFORMATION
Operating
Temperature Range
TA = – 40° to + 85°C
Package
SO–20L
Plastic DIP
MC33033
BRUSHLESS DC
MOTOR CONTROLLER
SEMICONDUCTOR
TECHNICAL DATA
20
1
P SUFFIX
PLASTIC PACKAGE
CASE 738
20
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751D
(SO–20L)
PIN CONNECTIONS
Top Drive
Output
BT 1
AT 2
Fwd/Rev 3
Sensor
Inputs
SA 4
SB 5
SC 6
Reference Output 7
Oscillator 8
Error Amp
Non Inverting Input
Error Amp
Inverting Input
9
10
20 CT
19 Output Enable
18 60°/120° Select
17 AB
16 BB
15 CB
Bottom
Drive
Outputs
14 VCC
13 Gnd
12
Current Sense
Non Inverting Input
11 Error Amp Out/
PWM Input
(Top View)
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 3
1

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MC33033 equivalent
MC33033
Figure 1. Oscillator Frequency versus
Timing Resistor
100
VCC = 20 V
TA = 25°C
10
Figure 2. Oscillator Frequency Change
versus Temperature
4.0
VCC = 20 V
2.0 RT = 4.7 k
CT = 10 nF
0
CT = 100 nF
CT = 10 nF
CT = 1.0 nF
0
1.0 10 100
RT, TIMING RESISTOR (k)
1000
– 2.0
– 4.0
– 55 – 25 0 25 50 75 100 125
TA, AMBIENT TEMPERATURE (°C)
Figure 3. Error Amp Open Loop Gain and
Phase versus Frequency
56 40
48 60
40 80
32 100
Phase
24 120
16
8.0
VCC = 20 V
VO = 3.0 V
0 RL = 15 k
– 8.0
CL = 100 pF
TA = 25°C
–16
– 24
1.0 k
10 k
Gain
100 k
1.0 M
140
160
180
200
220
240
10M
f, FREQUENCY (Hz)
Figure 4. Error Amp Output Saturation
Voltage versus Load Current
0
Vref
– 0.8 Source Saturation
(Load to Ground)
VCC = 20 V
TA = 25°C
–1.6
1.6
0.8
Gnd
Sink Saturation
(Load to Vref)
0
0 1.0 2.0 3.0 4.0 5.0
IO, OUTPUT LOAD CURRENT (mA)
Figure 5. Error Amp Small–Signal
Transient Response
AV = +1.0
3.05
No Load
TA = 25°C
3.0
2.95
1.0 µs/DIV
Figure 6. Error Amp Large–Signal
Transient Response
AV = +1.0
4.5
No Load
TA = 25°C
3.0
1.5
5.0 µs/DIV
MOTOROLA ANALOG IC DEVICE DATA
5


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