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| CS8441 Stepper Motor Driver with Divide by Select The CS8441 is a Stepper Motor Driver that implements an H-Bridge design in order to drive two coils in an eight step sequence per revolution in the divide by 1 mode; 16 step sequence in the divide by 2 mode. The H-Bridge is capable of delivering 85 mA to the load. The sequencer insures that the odometer is monotonic. This sequencer is configured such that simultaneous conduction does not occur. Before each successive output sequence the part is taken through a state where both outputs are turned off individually. This tends to minimize the inductive kick back energy that the part must absorb. On-chip clamp diodes are across each output to protect the part from the kick back energy that it must absorb. Additional part protection is provided by two functions. The first being "short circuit protection." This function will protect the part in the case of a shorted or partially shorted load. The second protection function is the "overvoltage function." This function monitors the level of the supply voltage. In transient conditions such as load dump, the part will shut down, protecting itself. Features * No Cross-Conduction in Either H-Bridge * Divide by 1 and Divide by 2 Modes * Guaranteed Monotonic * On-Chip Flyback Diodes * Fault Protection - Overvoltage - Load Dump Protection to 60 V VCC Input Comp. Coil Driver A COILA+ COILA- http://onsemi.com 8 1 DIP-8 N SUFFIX CASE 626 PIN CONNECTIONS AND MARKING DIAGRAM 1 CS8441YN8 AWL YYWW GND COILA+ COILA- SENSOR A WL, L YY, Y WW, W 8 VCC COILB+ COILB- SELECT = Assembly Location = Wafer Lot = Year = Work Week ORDERING INFORMATION Device CS8441YN8 Package DIP-8 Shipping 50 Units/Rail SENSOR Sequencer Overvoltage and Short Circuit Protection SELECT B1 B2 Coil Driver B COILB+ COILB- GND Figure 1. Block Diagram (c) Semiconductor Components Industries, LLC, 2001 1 February, 2001 - Rev. 3 Publication Order Number: CS8441/D CS8441 ABSOLUTE MAXIMUM RATINGS* Rating Supply Voltage (VCC) (Note 1.): Input Voltage (VIN) Storage Temperature Range (TSTG) Junction Temperature Range ESD (Human Body Model) Lead Temperature Soldering: 1. -40C to +125C. 2. 10 second maximum. *The maximum package power dissipation must be observed. Wave Solder: (through hole styles only) (Note 2.) Continuous 100 ms Pulse Transient Value -0.5 to 24 -0.5 to 60 -0.3 to VCC + 0.3 -65 to 150 -40 to 150 2.0 260 peak Unit V V V C C kV C ELECTRICAL CHARACTERISTICS (-40C TA 125C, 6.5 V VCC 15.5 V; unless otherwise stated. All voltage shall be referenced to GND unless otherwise noted. Overvoltage shutdown of coils occurs when VCC > 16 V.) Characteristic Supply, VCC Supply Voltage Range -40C TA 125C -40C TA 25C Transient Pulse, 100 ms VCC = 15.5 VDC, Outputs not loaded. - 6.5 6.5 - - 16 - - - 24 - 15.5 24 35 35 23 VDC VDC VDC mA V Test Conditions Min Typ Max Unit Supply Current Overvoltage Shutdown Speed Sensor Input, SENSOR Input Frequency Range Switching Threshold Hysteresis Input Bias Current Input Voltage Range Operating Input Voltage Input Clamp Current Divider Select Input, SELECT Logic 0 Input Voltage Logic 1 Input Voltage Logic 0 Input Current Logic 1 Input Current Coil Output Drivers Coil Load Coil Inductance Coil Resistance Temperature Energized Coil Voltage (Note 3.) (Both Polarities) A and B - - - 0.8 VDC VIN VCC - 10 k Resistor in Series I Clamp at VIN = 0 VDC - 1.2 300 - 0 - - 0.2 - 500 0.1 - - -0.4 1.0 2.4 - 1.0 VCC -15 to VCC -5.0 kHz VDC mVDC A VDC VDC mA - - 0 V VIN 100 mV 3.0 V VIN 15.5 VDC - 3.0 - - - - -1.0 0.75 100 VCC -100 2.0 mVDC VDC A mA +25C - Coefficient VCC = 6.5 VDC VCC = 10 VDC VCC = 15.5 VDC, -20C TA 125C VCC = 15.5 VDC, -40C TA -20C - 198 - - VCC - 1.5 V VCC - 1.6 V VCC - 1.75 V VCC - 2.0 V - 210 80 - VCC - 0.9 V VCC - 1.0 V VCC - 1.1 V VCC - 1.2 V - 222 - 0.35 - - - - 100 mH %/C VDC VDC VDC VDC A De-energized Coil Leakage Current 3. Voltage across the coils shall be measured at the specific voltages, but shall also be within linearly interpolated limits. http://onsemi.com 2 CS8441 ELECTRICAL CHARACTERISTICS (continued) (-40C TA 125C, 6.5 V VCC 15.5 V; unless otherwise stated. All voltage shall be referenced to GND unless otherwise noted. Overvoltage shutdown of coils occurs when VCC > 16 V.) Characteristic Short Circuit Protection Short Circuit Threshold I Coil A + I Coil B Short Circuit Turn-Off Delay - - - - 275 5.0 400 - mA s Test Conditions Min Typ Max Unit PACKAGE PIN DESCRIPTION PACKAGE PIN # DIP-8 1 2 3 4 5 6 7 8 PIN SYMBOL GND COILA+ COILA- SENSOR SELECT COILB- COILB+ VCC Ground connection. Output stage, when active, this pin supplies current to COIL A. Output stage, when active, this pin supplies current to COIL A. Input signal from wheel speed or engine rpm. Selects divide by 1 or divide by 2 mode. Output stage, when active, this pin supplies current to COIL B. Output stage, when active, this pin supplies current to COIL B. Supply voltage. FUNCTION CIRCUIT OPERATION SPEED SENSOR INPUT SENSOR is a PNP comparator input which accepts a sine wave or a square wave input. This input is protected from excursions above VCC as well as any below ground, as long as the current is limited to 1.5 mA. It has an active clamp set to zero volts to prevent negative input voltages from disrupting normal operation. The sensor input can withstand 150 VDC as long as the input current is limited to 1.5 mA max. using a series resistor of 100 k. COIL DRIVER OUTPUTS Simultaneously energizing the source and sink on either leg is not permitted, i.e. Q1 & Q2 or Q3 & Q4 cannot be energized simultaneously. Circuit function is not affected by inductive transients due to coil loads as specified in the Transition States section. The transition states occur as indicated in Table 1 without any intermediate states permitted. Table 1. Transition States State 0 1 2 3 4 5 6 7 Coil A + OFF - - - OFF + + Coil B + + + OFF - - - OFF The polarity definition for the coil driver outputs is as follows: Polarity Positive (+) Negative (-) Connect Coil + VCC GND Connect Coil - GND VCC DIVIDER SELECT INPUT The speed sensor input frequency is divided by one or divided by two by connecting the divider select input, (Pin 5) as follows: Logic 0 = divide by 2. Logic 1 = divide by 1. http://onsemi.com 3 CS8441 Short Circuit VCC Q1 Q3 Sense Resistor Overvoltage and Short Circuit Protection Coil Q2 Q4 Short Circuit GND Sense Resistor Figure 2. Coil Driver Output State # 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 SSI Coil A Coil B Figure 3. Divide by 1 (8 Step Mode), SELECT = 1 State # SSI 0 1 2 3 4 5 6 7 0 Coil A Coil B Figure 4. Divide by 2 (16 Step Mode), SELECT = 0 http://onsemi.com 4 CS8441 COIL A 210 12 80 mH COIL B 210 12 80 mH COILA+ COILA- COILB+ COILB- SENSOR CS8441 D1 1.0 A 600 PIV IGN R1 3.9 500 mW Z1 50 V 500 mW C1 10 F VCC SELECT GND C2 0.1 F R3 15 k Buffered Speed Signal (Open Collector Drive) R2 100 k C3 0.01 F Figure 5. Odometer Application Diagram http://onsemi.com 5 CS8441 PACKAGE DIMENSIONS DIP-8 N SUFFIX CASE 626-05 ISSUE L 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 8 5 -B- 1 4 F NOTE 2 -A- L C -T- SEATING PLANE J N D K M M TA M H G 0.13 (0.005) B M PACKAGE THERMAL DATA Parameter RJC RJA Typical Typical DIP-8 52 100 Unit C/W C/W http://onsemi.com 6 CS8441 Notes http://onsemi.com 7 CS8441 ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC 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 special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC 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. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC 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 SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC 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 SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. PUBLICATION ORDERING INFORMATION NORTH AMERICA Literature Fulfillment: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: ONlit@hibbertco.com Fax Response Line: 303-675-2167 or 800-344-3810 Toll Free USA/Canada N. American Technical Support: 800-282-9855 Toll Free USA/Canada EUROPE: LDC for ON Semiconductor - European Support German Phone: (+1) 303-308-7140 (Mon-Fri 2:30pm to 7:00pm CET) Email: ONlit-german@hibbertco.com French Phone: (+1) 303-308-7141 (Mon-Fri 2:00pm to 7:00pm CET) Email: ONlit-french@hibbertco.com English Phone: (+1) 303-308-7142 (Mon-Fri 12:00pm to 5:00pm GMT) Email: ONlit@hibbertco.com EUROPEAN TOLL-FREE ACCESS*: 00-800-4422-3781 *Available from Germany, France, Italy, UK, Ireland CENTRAL/SOUTH AMERICA: Spanish Phone: 303-308-7143 (Mon-Fri 8:00am to 5:00pm MST) Email: ONlit-spanish@hibbertco.com ASIA/PACIFIC: LDC for ON Semiconductor - Asia Support Phone: 303-675-2121 (Tue-Fri 9:00am to 1:00pm, Hong Kong Time) Toll Free from Hong Kong & Singapore: 001-800-4422-3781 Email: ONlit-asia@hibbertco.com JAPAN: ON Semiconductor, Japan Customer Focus Center 4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan 141-0031 Phone: 81-3-5740-2745 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 8 CS8441/D |
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