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PDF ( 数据手册 , 数据表 ) MC33035

零件编号 MC33035
描述 BRUSHLESS DC MOTOR CONTROLLER
制造商 Motorola Semiconductors
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MC33035 数据手册, 描述, 功能
Order this document by MC33035/D
MC33035
Brushless DC
Motor Controller
The MC33035 is a high performance second generation monolithic
brushless DC motor controller containing all of the active functions required
to implement a full featured open loop, three or four phase motor control
system. This device consists of a rotor position decoder for proper
commutation sequencing, temperature compensated reference capable of
supplying sensor power, frequency programmable sawtooth oscillator, three
open collector top drivers, and three high current totem pole bottom drivers
ideally suited for driving power MOSFETs.
Also included are protective features consisting of undervoltage lockout,
cycle–by–cycle current limiting with a selectable time delayed latched
shutdown mode, internal thermal shutdown, and a unique fault output that
can be interfaced into microprocessor controlled systems.
Typical motor control functions include open loop speed, forward or
reverse direction, run enable, and dynamic braking. The MC33035 is
designed to operate 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
Pinned–Out Current Sense Reference
Internal Thermal Shutdown
Selectable 60°/300° or 120°/240° Sensor Phasings
Can Efficiently Control Brush DC Motors with External MOSFET
H–Bridge
Device
MC33035DW
MC33035P
ORDERING INFORMATION
Operating
Temperature Range
TA = – 40° to + 85°C
Package
SO–24L
Plastic DIP
BRUSHLESS DC
MOTOR CONTROLLER
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 724
24
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
(SO–24L)
24
1
PIN CONNECTIONS
Top Drive
Output
BT 1
AT 2
Fwd/Rev 3
Sensor
Inputs
SA 4
SB 5
SC 6
Output Enable 7
Reference Output 8
Current Sense
Noninverting Input
9
Oscillator 10
Error Amp
Noninverting Input
Error Amp
Inverting Input
11
12
24 CT
23 Brake
22 60°/120° Select
21 AB
20 BB
19 CB
Bottom
Drive
Outputs
18 VC
17 VCC
16 Gnd
15
Current Sense
Inverting Input
14 Fault Output
13
Error Amp Out/
PWM Input
(Top View)
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 2
1







MC33035 pdf, 数据表
MC33035
Pin
1, 2, 24
3
4, 5, 6
7
8
9
10
11
12
13
14
15
16
17
18
19, 20, 21
22
23
PIN FUNCTION DESCRIPTION
Symbol
Description
BT, AT, CT
These three open collector Top Drive outputs are designed to drive the external
upper power switch transistors.
Fwd/Rev
The Forward/Reverse Input is used to change the direction of motor rotation.
SA, SB, SC
Output Enable
Reference Output
These three Sensor Inputs control the commutation sequence.
A logic high at this input causes the motor to run, while a low causes it to coast.
This output provides charging current for the oscillator timing capacitor CT and a
reference for the error amplifier. It may also serve to furnish sensor power.
Current Sense Noninverting Input
A 100 mV signal, with respect to Pin 15, at this input terminates output switch
conduction during a given oscillator cycle. This pin normally connects to the top
side of the current sense resistor.
Oscillator
Error Amp Noninverting Input
The Oscillator frequency is programmed by the values selected for the timing
components, RT and CT.
This input is normally connected to the speed set potentiometer.
Error Amp Inverting Input
This input is normally connected to the Error Amp Output in open loop applications.
Error Amp Out/PWM Input
This pin is available for compensation in closed loop applications.
Fault Output
This open collector output is active low during one or more of the following
conditions: Invalid Sensor Input code, Enable Input at logic 0, Current Sense Input
greater than 100 mV (Pin 9 with respect to Pin 15), Undervoltage Lockout
activation, and Thermal Shutdown.
Current Sense Inverting Input
Reference pin for internal 100 mV threshold. This pin is normally connected to the
bottom side of the current sense resistor.
Gnd This pin supplies a ground for the control circuit and should be referenced back to
the power source ground.
VCC
VC
CB, BB, AB
This pin is the positive supply of the control IC. The controller is functional over a
minimum VCC range of 10 to 30 V.
The high state (VOH) of the Bottom Drive Outputs is set by the voltage applied to
this pin. The controller is operational over a minimum VC range of 10 to 30 V.
These three totem pole Bottom Drive Outputs are designed for direct drive of the
external bottom power switch transistors.
60°/120° Select
The electrical state of this pin configures the control circuit operation for either 60°
(high state) or 120° (low state) sensor electrical phasing inputs.
Brake
A logic low state at this input allows the motor to run, while a high state does not
allow motor operation and if operating causes rapid deceleration.
INTRODUCTION
The MC33035 is one of a series of high performance
monolithic DC brushless motor controllers produced by
Motorola. It contains all of the functions required to
implement a full–featured, open loop, three or four phase
motor control system. In addition, the controller can be made
to operate DC brush motors. Constructed with Bipolar Analog
technology, it offers a high degree of performance and
ruggedness in hostile industrial environments. The MC33035
contains a rotor position decoder for proper commutation
sequencing, a temperature compensated reference capable
of supplying a sensor power, a frequency programmable
sawtooth oscillator, a fully accessible error amplifier, a pulse
width modulator comparator, three open collector top drive
outputs, and three high current totem pole bottom driver
outputs ideally suited for driving power MOSFETs.
Included in the MC33035 are protective features
consisting of undervoltage lockout, cycle–by–cycle current
limiting with a selectable time delayed latched shutdown
mode, internal thermal shutdown, and a unique fault output
that can easily be interfaced to a microprocessor controller.
Typical motor control functions include open loop speed
control, forward or reverse rotation, run enable, and dynamic
braking. In addition, the MC33035 has a 60°/120° select pin
which configures the rotor position decoder for either 60° or
120° sensor electrical phasing inputs.
FUNCTIONAL DESCRIPTION
A representative internal block diagram is shown in
Figure 19 with various applications shown in Figures 36, 38,
39, 43, 45, and 46. A discussion of the features and function
of each of the internal blocks given below is referenced to
Figures 19 and 36.
Rotor Position Decoder
An internal rotor position decoder monitors the three
sensor inputs (Pins 4, 5, 6) to provide the proper sequencing
of the top and bottom drive outputs. The sensor inputs are
designed to interface directly with open collector type Hall
Effect switches or opto slotted couplers. Internal pull–up
resistors are included to minimize the required number of
external components. The inputs are TTL compatible, with
their thresholds typically at 2.2 V. The MC33035 series is
designed to control three phase motors and operate with four
of the most common conventions of sensor phasing. A
60°/120° Select (Pin 22) is conveniently provided and affords
the MC33035 to configure itself to control motors having
either 60°, 120°, 240° or 300° electrical sensor phasing. With
three sensor inputs there are eight possible input code
combinations, six of which are valid rotor positions. The
remaining two codes are invalid and are usually caused by an
open or shorted sensor line. With six valid input codes, the
8 MOTOROLA ANALOG IC DEVICE DATA







MC33035 equivalent, schematic
MC33035
Figure 37. Three Phase, Six Step, Full Wave Commutation Waveforms
0
SA
Sensor Inputs
60°/120°
Select Pin
Open
SB
SC
Rotor Electrical Position (Degrees)
60 120 180 240 300 360 420 480 540 600 660 720
Code 100 110 111 011 001 000 100 110 111 011 001 000
SA
Sensor Inputs
60°/120°
Select Pin
Grounded
SB
SC
Code 100 110 010 011 001 101 100 110 010 011 001 101
Top Drive
Outputs
AT
BT
CT
AB
Bottom Drive
Outputs
BB
CB
Conducting
Power Switch
Transistors
Q1 + Q6 Q2 + Q6 Q2 + Q4 Q3 + Q4 Q3 + Q5 Q1 + Q5 Q1 + Q6 Q2 + Q6 Q2 + Q4 Q3 + Q4 Q3 + Q5 Q1 + Q5
Motor Drive
Current
+
AO
+
BO
+
CO
Full Speed (No PWM)
Reduced Speed ( 50% PWM)
Fwd/Rev = 1
16 MOTOROLA ANALOG IC DEVICE DATA










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