Order this document by MC33033/D
BRUSHLESS DC
MOTOR CONTROLLER
The MC33033 is a high performance second generation, limited feature,
monolithic brushless dc motor controller which has evolved from Motorola′s
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.
SEMICONDUCTOR
TECHNICAL DATA
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.
20
1
P SUFFIX
PLASTIC PACKAGE
CASE 738
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
20
• Undervoltage Lockout
1
• 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
DW SUFFIX
PLASTIC PACKAGE
CASE 751D
(SO–20L)
• Internal Thermal Shutdown
PIN CONNECTIONS
• Selectable 60°/300° or 120°/240° Sensor Phasings
• Also Efficiently Control Brush DC Motors with External MOSFET
Top Drive
Output
1
20
C
B
T
T
H–Bridge
A
2
3
4
19
18
17
16
15
14
Output Enable
T
Fwd/Rev
60
°/120° Select
S
A
A
B
Bottom
Drive
Outputs
Sensor
Inputs
5
6
7
S
S
B
B
B
C
C
ORDERING INFORMATION
Operating
B
Reference Output
V
CC
Temperature Range
Device
MC33033DW
MC33033P
Package
SO–20L
Oscillator
8
9
13 Gnd
T
= –40° to +85°C
Error Amp
Non Inverting Input
Error Amp
Current Sense
Non Inverting Input
Error Amp Out/
PWM Input
A
12
11
Plastic DIP
10
Inverting Input
(Top View)
Motorola, Inc. 1996
Rev 3
1
MOTOROLA ANALOG IC DEVICE DATA