Order this document by MC33039/D 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 * * * 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 8.25 V 3 CT R 20 k 2R Delay To Rotor Position Sensors B 5 + - fout C 1 8 VCC B 2 7 Gnd A 3 6 RT/CT A 4 5 fout 15 k (Top View) 2 S Q Delay C Inputs + + A RT R 1 + Delay + - 0.3 V ORDERING INFORMATION 7 Gnd Device MC33039D MC33039P Operating Temperature Range TA = - 40 to +85C Motorola, Inc. 1996 MOTOROLA ANALOG IC DEVICE DATA Package SO-8 Plastic DIP Rev 0 1 MC33039 MAXIMUM RATINGS Rating Value Unit 30 mA IIH 5.0 mA Output Current (Pins 4, 5), Sink or Source IDRV 20 mA Power Dissipation and Thermal Characteristics Maximum Power Dissipation @ TA = + 85C Thermal Resistance, Junction-to-Air PD RJA 650 100 mW C/W VCC Zener Current Symbol I Logic Input Current (Pins 1, 2, 3) Z(V CC ) Operating Junction Temperature TJ + 150 C Operating Ambient Temperature Range TA - 40 to + 85 C Tstg - 65 to + 150 C Storage Temperature Range ELECTRICAL CHARACTERISTICS (VCC = 6.25 V, RT = 10 k, CT = 22 nF, TA = 25C, unless otherwise noted) Characteristic Symbol Min Typ Max VIH VIL VH 2.4 -- 0.4 2.1 1.4 0.7 -- 1.0 0.9 Unit LOGIC INPUTS Input Threshold Voltage High State Low State Hysteresis V A Input Current High State (VIH = 5.0 V) A B, C Low State (VIL = 0 V) A B, C IIH - 40 -- - 60 - 0.3 - 80 - 5.0 - 190 -- - 300 - 0.3 - 380 - 5.0 IIL 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) V VOH 3.60 4.20 3.95 4.75 4.20 -- -- -- 0.25 0.25 0.50 0.50 Idischg 20 35 60 mA tPW 205 225 245 s Power Supply Operating Voltage Range (TA = - 40 to + 85C) VCC 5.5 -- VZ V Power Supply Current ICC 1.8 3.9 5.0 mA Zener Voltage (IZ = 10 mA) VZ 7.5 8.25 9.0 V Zka -- 2.0 5.0 VOL Capacitor CT Discharge Current Output Pulse Width (Pin 5) POWER SUPPLY SECTION Zener Dynamic Impedance (IZ = 10 mA to 20 mA, f 2 p 1.0 kHz) 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 Vout (AVG) fout Output 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 MOTOROLA ANALOG IC DEVICE DATA 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. 3 4 1 2 3 20 k Delay Delay Delay A 4 7 8.25 V 8 R S Q MC33039P + 2R R 15 k 0.3 V + - + - 5 6 CT RT Speed Set Enable VCC Fwd/ Rev OSC EA MC33035P + - REF - + PWM UVLO R S S R Q Q Thermal + + + POS DEC + - Brake ILIMIT Fault VM S N S Motor Assy N Rotor MC33039 Figure 2. Typical Closed Loop Speed Control Application Output Buffers MOTOROLA ANALOG IC DEVICE DATA MC33039 Figure 4. fout, Pulse Width Change versus Temperature t PW , OUTPUT PULSE WIDTH CHANGE (%) Figure 3. fout, Pulse Width versus Timing Resistor 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 20 RT , TIMING RESISTOR (k) 200 + 1.6 VCC = 6.25 V RT = 10 k CT = 22 nF + 0.8 0 - 0.8 - 1.6 - 55 - 25 t PW , OUTPUT PULSE WIDTH CHANGE (%) Figure 5. fout, Pulse Width Change versus Supply Voltage + 100 + 125 Figure 6. Supply Current versus Supply Voltage + 4.0 20 ICC , SUPPLY CURRENT (mA) TA = 25C + 2.0 0 - 2.0 - 4.0 4.5 5.5 6.5 7.5 VCC , SUPPLY VOLTAGE (V) VCC = 6.25 V TA = 25C Source Saturation (Load to Ground) + 0.4 Sink Saturation (Load to VCC) Gnd 0 0 12 8.0 TA = - 40C 4.0 4.0 8.0 12 IO , OUTPUT LOAD CURRENT (mA) MOTOROLA ANALOG IC DEVICE DATA 2.0 TA = 25C TA = 125C 4.0 6.0 8.0 VCC , SUPPLY VOLTAGE (V) 10 Figure 8. fout, Saturation Change versus Temperature V sat (sink), SINK SATURATION CHANGE (%) VCC - 2.0 + 0.2 16 0 8.5 0 - 4.0 Pins 1, 2, 3 Connected together 0 Figure 7. fout, Saturation versus Load Current V sat , OUTPUT SATURATION VOLTAGE (V) 0 + 25 + 50 + 75 TA , AMBIENT TEMPERATURE (C) 16 V sat (SOURCE), SOURCE SATURATION CHANGE (%) t PW , OUTPUT PULSE WIDTH (ms) 100 + 0.6 + 16 VCC = 6.25 V IO = 5.0 mA + 0.4 + 8.0 + 0.2 0 Sink Saturation (Load to VCC) Source Saturation (Load to Ground) 0 - 8.0 - 0.2 - 16 - 55 - 25 0 + 25 + 50 + 75 TA , AMBIENT TEMPERATURE (C) + 100 + 125 5 MC33039 OUTLINE DIMENSIONS P SUFFIX PLASTIC PACKAGE CASE 626-05 ISSUE K 8 5 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. -B- 1 4 F -A- NOTE 2 DIM A B C D F G H J K L M N L C J -T- N SEATING PLANE D M K 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 G H 0.13 (0.005) M T A M B M D SUFFIX PLASTIC PACKAGE CASE 751-05 ISSUE N (SO-8) 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. -A- 8 5 -B- 1 4X P 0.25 (0.010) 4 M B M G R C -T- 8X D 0.25 (0.010) 6 K M T B SEATING PLANE S A M_ S X 45 _ F J 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 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. 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