MC33039 Datasheet, PDF (1/8 Pages) ON Semiconductor – CLOSED LOOP BRUSHLESS MOTOR ADAPTER

Closed Loop Brushless
Motor Adapter
The MC33039 is a high performance closed–loop speed control adapter
specifically designed for use in brushless DC motor control systems.
Implementation will allow precise speed regulation without the need for a
magnetic or optical tachometer. This device contains three input buffers
each with hysteresis for noise immunity, three digital edge detectors, a
programmable monostable, and an internal shunt regulator. Also included is
an inverter output for use in systems that require conversion of sensor
phasing. Although this device is primarily intended for use with the MC33035
brushless motor controller, it can be used cost effectively in many other
closed–loop speed control applications.
• Digital Detection of Each Input Transition for Improved Low
Speed Motor Operation
• TTL Compatible Inputs With Hysteresis
• Operation Down to 5.5 V for Direct Powering from MC33035 Reference
• Internal Shunt Regulator Allows Operation from a Non–Regulated
Voltage Source
• Inverter Output for Easy Conversion between 60°/300° and 120°/240°
Sensor Phasing Conventions
Order this document by MC33039/D
MC33039
CLOSED LOOP
BRUSHLESS MOTOR
ADAPTER
SEMICONDUCTOR
TECHNICAL DATA
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
3
φ_A
+
20 k
To Rotor
Position
Sensors
2
φ_B
1
φ_C
Representative Block Diagram
φ_A
4
VCC
8
+ 8.25 V
Delay
RT
6
+
CT
R
+
2R –
5
fout
15 k
Delay
Delay
SQ
R
+
+–
0.3 V
7
Gnd
PIN CONNECTIONS
Inputs
φ_C 1
φ_B 2
φ_A 3
φ_A 4
8 VCC
7 Gnd
6 RT/CT
5 fout
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC33039D
TA = – 40° to +85°C
MC33039P
SO–8
Plastic DIP
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 0
1