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MC33039 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
CLOSED LOOP BRUSHLESS MOTOR ADAPTER
SEMICONDUCTOR TECHNICAL DATA
* * *
8 1
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
P SUFFIX PLASTIC PACKAGE CASE 626
8 1
D SUFFIX PLASTIC PACKAGE CASE 751 (SO-8)
Representative Block Diagram PIN CONNECTIONS
VCC A 4 8 6 + 20 k Delay To Rotor Position Sensors B 2 Delay C 1 Delay SQ R + + - 0.3 V R 2R + - 15 k 5 fout RT
C 1 Inputs
CT
8 VCC 7 Gnd 6 RT/CT 5 fout
+ + A 3
8.25 V
B 2 A 3 A 4 (Top View)
ORDERING INFORMATION
7 Gnd
Device MC33039D MC33039P
Operating Temperature Range TA = - 40 to +85C
Package SO-8 Plastic DIP
(c) Motorola, Inc. 1996
Rev 0
MOTOROLA ANALOG IC DEVICE DATA
1
MC33039
MAXIMUM RATINGS
Rating VCC Zener Current Logic Input Current (Pins 1, 2, 3) Output Current (Pins 4, 5), Sink or Source Power Dissipation and Thermal Characteristics Maximum Power Dissipation @ TA = + 85C Thermal Resistance, Junction-to-Air Operating Junction Temperature Operating Ambient Temperature Range Storage Temperature Range Symbol I Z(V CC ) Value 30 5.0 20 650 100 + 150 - 40 to + 85 - 65 to + 150 Unit mA mA mA mW C/W C C C
IIH IDRV PD RJA TJ TA Tstg
ELECTRICAL CHARACTERISTICS (VCC = 6.25 V, RT = 10 k, CT = 22 nF, TA = 25C, unless otherwise noted)
Characteristic LOGIC INPUTS Input Threshold Voltage High State Low State Hysteresis Input Current High State (VIH = 5.0 V) A B, C Low State (VIL = 0 V) A B, C MONOSTABLE AND OUTPUT SECTIONS Output Voltage High State fout (Isource = 5.0 mA) A (Isource = 2.0 mA) Low State fout (Isink = 10 mA) A (Isink = 10 mA) Capacitor CT Discharge Current Output Pulse Width (Pin 5) POWER SUPPLY SECTION Power Supply Operating Voltage Range (TA = - 40 to + 85C) Power Supply Current Zener Voltage (IZ = 10 mA) Zener Dynamic Impedance (IZ = 10 mA to 20 mA, f VCC ICC 5.5 1.8 7.5 -- -- 3.9 8.25 2.0 VZ 5.0 9.0 5.0 V mA V V VOH 3.60 4.20 VOL -- -- Idischg tPW 20 205 0.25 0.25 35 225 0.50 0.50 60 245 mA s 3.95 4.75 4.20 -- V VIH VIL VH IIH - 40 -- IIL - 190 -- - 300 - 0.3 - 380 - 5.0 - 60 - 0.3 - 80 - 5.0 2.4 -- 0.4 2.1 1.4 0.7 -- 1.0 0.9 A Symbol Min Typ Max Unit
p 1.0 kHz)
VZ Zka
2
MOTOROLA ANALOG IC DEVICE DATA
MC33039
Figure 1. Typical Three Phase, Six Step Motor Application
Rotor Electrical Position (Degrees) 0 60 120 180 240 300 360 480 600 720
A 60 Sensor Electrical Phasing Input
B
C
A
120 Sensor Electrical Phasing Input
B
C
A Output
Latch ISetI Input
Vth 0.67 VCC RT/CT
fout Output
Vout (AVG)
Constant Motor Speed
Increasing Motor Speed
OPERATING DESCRIPTION
The MC33039 provides an economical method of implementing closed-loop speed control of brushless DC motors by eliminating the need for a magnetic or optical tachometer. Shown in the timing diagram of Figure 1, the three inputs (Pins 1, 2, 3) monitor the brushless motor rotor position sensors. Each sensor signal transition is digitally detected, ORied at the Latch iSeti Input, and causes CT to discharge. A corresponding output pulse is generated at fout (Pin 5) of a defined amplitude, and programmable width determined by the values selected for RT and CT (Pin 6). The average voltage of the output pulse train increases with motor speed. When fed through a low pass filter or integrator, a DC voltage proportional to speed is generated. Figure 2 shows the proper connections for a typical closed loop application using the MC33035 brushless motor controller. Constant speed operation down to 100 RPM is possible with economical three phase four pole motors. The A inverter output (Pin 4) is used in systems where the controller and motor sensor phasing conventions are not compatible. A method of converting from either convention to the other is shown in Figure 3. For a more detailed explanation of this subject, refer to the text above Figure 39 on the MC33035 data sheet. The output pulse amplitude VOH is constant with temperature and controlled by the supply voltage on VCC (Pin 8). Operation down to 5.5 V is guaranteed over temperature. For systems without a regulated power supply, an internal 8.25 V shunt regulator is provided.
MOTOROLA ANALOG IC DEVICE DATA
3
4
Fault
N
VM
Rotor
S
POS DEC
Fwd/ Rev
S
Assy N
VCC
+ +
UVLO
REF
+
Motor
A 8 6 8.25 V CT R 2R 15 k
+ -
Output Buffers
4 RT Speed Set
+ -
MC33039
Enable
3 5
20 k
EA PWM
- +
Thermal
Delay
R Q S S
2 SQ R
+ + -
Delay
1 0.3 V
OSC
R
Delay
Q
+ -
Figure 2. Typical Closed Loop Speed Control Application
MC33039P
7
MC33035P
ILIMIT
MOTOROLA ANALOG IC DEVICE DATA
Brake
MC33039
Figure 3. fout, Pulse Width versus Timing Resistor
100 t PW , OUTPUT PULSE WIDTH (ms) VCC = 6.25 V TA = 25C 10 CT = 220 nF 1.0 CT = 22 nF 0.1 CT = 2.2 nF 0.01 2.0 t PW , OUTPUT PULSE WIDTH CHANGE (%) + 1.6 VCC = 6.25 V RT = 10 k CT = 22 nF
Figure 4. fout, Pulse Width Change versus Temperature
+ 0.8
0
- 0.8
20 RT , TIMING RESISTOR (k)
200
- 1.6 - 55
- 25
0 + 25 + 50 + 75 TA , AMBIENT TEMPERATURE (C)
+ 100
+ 125
Figure 5. fout, Pulse Width Change versus Supply Voltage
t PW , OUTPUT PULSE WIDTH CHANGE (%) + 4.0 ICC , SUPPLY CURRENT (mA) TA = 25C 20 16
Figure 6. Supply Current versus Supply Voltage
Pins 1, 2, 3 Connected together
+ 2.0
12
0
8.0 TA = - 40C TA = 25C TA = 125C 4.0 6.0 8.0 VCC , SUPPLY VOLTAGE (V)
- 2.0
4.0 0
- 4.0 4.5
5.5
6.5 7.5 VCC , SUPPLY VOLTAGE (V)
8.5
0
2.0
10
VCC - 2.0 Source Saturation (Load to Ground)
VCC = 6.25 V TA = 25C
V sat (sink), SINK SATURATION CHANGE (%)
V sat , OUTPUT SATURATION VOLTAGE (V)
0
+ 0.6 + 16 VCC = 6.25 V IO = 5.0 mA + 8.0 Sink Saturation (Load to VCC) Source Saturation (Load to Ground) 0 - 8.0
+ 0.4
- 4.0
+ 0.2 0
+ 0.4 Sink Saturation (Load to VCC) Gnd 0 0 4.0 8.0 12 IO , OUTPUT LOAD CURRENT (mA) 16
+ 0.2
- 0.2 - 16 - 55 - 25 0 + 25 + 50 + 75 TA , AMBIENT TEMPERATURE (C) + 100 + 125
MOTOROLA ANALOG IC DEVICE DATA
5
V sat (SOURCE), SOURCE SATURATION CHANGE (%)
Figure 7. fout, Saturation versus Load Current
Figure 8. fout, Saturation Change versus Temperature
MC33039
OUTLINE DIMENSIONS
P SUFFIX PLASTIC PACKAGE CASE 626-05 ISSUE K
8
5
-B-
1 4
F
NOTE 2
NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS). 3. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 9.40 10.16 6.10 6.60 3.94 4.45 0.38 0.51 1.02 1.78 2.54 BSC 0.76 1.27 0.20 0.30 2.92 3.43 7.62 BSC --- 10_ 0.76 1.01 INCHES MIN MAX 0.370 0.400 0.240 0.260 0.155 0.175 0.015 0.020 0.040 0.070 0.100 BSC 0.030 0.050 0.008 0.012 0.115 0.135 0.300 BSC --- 10_ 0.030 0.040
-A- L
C -T-
SEATING PLANE
J N D K
M
M
H
G 0.13 (0.005) TA
M
B
M
D SUFFIX PLASTIC PACKAGE CASE 751-05 ISSUE N (SO-8) -A-
8 5 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.18 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.189 0.196 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.007 0.009 0.004 0.009 0_ 7_ 0.229 0.244 0.010 0.019
-B-
1 4
4X
P 0.25 (0.010)
M
B
M
G C -T-
8X SEATING PLANE
R
X 45 _
F
D 0.25 (0.010)
M
K TB
M_
S
J
S
A
6
MOTOROLA ANALOG IC DEVICE DATA
MC33039
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola 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 consequential or incidental damages. "Typical" parameters which may be provided in Motorola 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. Motorola does not convey any license under its patent rights nor the rights of others. Motorola 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 Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola 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 Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
MOTOROLA ANALOG IC DEVICE DATA
7
MC33039
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MC33039/D MOTOROLA ANALOG IC DEVICE DATA

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