CS4161 CS4161 85mA Dual H-Bridge Odometer Driver with Divide by Select and UVLO Description The CS4161 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 85mA 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 Features 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. ■ Undervoltage Lockout The CS4161 includes overvoltage and short circuit protection circuitry. It is lead for lead compatible with the CS-8441. The CS4161 includes an additional undervoltage lockout (UVLO) function which disables the output stage until the supply voltage rises above 5.6V, typically. The UVLO has hysteresis to prevent any power up glitching. ■ Guaranteed Monotonic ■ Cross-conduction Prevention Logic ■ Divide by 1 and Divide by 2 Modes ■ On Chip Flyback Diodes ■ Fault Protection Overvoltage Load Dump Protection to 60V Absolute Maximum Ratings Supply Voltage (VCC) (continuous) -40ûC to +105ûC .......................-0.5 to 24V (100ms pulse transient) -40ûC to +105ûC...........................-0.5 to 60V Input Voltage (VIN) ...................................................................-0.3 to VCC +0.3V Operating Temperature Range ....................................................-40¡C to 105¡C Storage Temperature Range (TSTG) ...........................................-65¡C to 150¡C Junction Temperature Range .......................................................-40¡C to 150¡C ESD (Human Body Model) .............................................................................2kV Lead Temperature Soldering Wave Solder (through hole styles only)............10 sec. max, 260¡C peak Block Diagram Sequencer SELECT Gnd VCC COILA+ COILB+ COILAÐ COILBÐ SENSOR Coil Driver A Input Comp. 8 Lead PDIP Gnd 1 V CC SENSOR Package Option SELECT COILA+ COILA- Overvoltage and Short Circuit Protection ¸1 ¸2 Coil Driver B COILB + COILB- Cherry Semiconductor Corporation 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)885-3600 Fax: (401)885-5786 Email: [email protected] Web Site: www.cherry-semi.com Rev. 1/28/97 1 A ¨ Company CS4161 Electrical Characteristics: Unless otherwise stated, these specifications apply for -40¡C ² TA ² 105¡C, 6.5V ² VCC ² 15.5V. All voltage shall be referenced to Gnd unless otherwise noted. Overvoltage shutdown of coils occurs when VCC > 16V. PARAMETER ■ Supply, VCC Supply Voltage Range Supply Current Overvoltage Shutdown Undervoltage Lockout Voltage ■ 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 (Both Polarities) A and B TEST CONDITIONS -40¡C ² TA ² 105¡C -40¡C ² TA ² 25¡C Transient Pulse, 100ms VCC = 15.5 VDC , Outputs not loaded MIN MAX UNIT 24 15.5 24.0 35.0 35 23 6.1 1000 VDC VDC VDC mA V V mV 1.0 2.6 kHz VDC mVDC µA VDC VDC mA 6.5 6.5 16 5.1 200 VCC Initial Power up UVLO Hysteresis TYP 5.6 600 0.2 1.2 300 0.8VDC ² VIN ² VCC 500 0.1 0 10k½ Resistor in Series I Clamp at VIN = 0VDC -0.4 ±1.0 VCC -15 to VCC -5.0 100 3.0 0V ² VIN ² 100mV 3V ² VIN ² 15.5 VDC +25¡C 198 Coefficient VCC - 1.5V VCC = 6.5 VDC VCC = 10.0 VDC VCC - 1.6V VCC = 15.5 VDC, -20¡C ² TA ² 105¡C VCC - 1.75V VCC = 15.5 VDC, -40¡C ² TA ² -20¡C VCC - 2.0V De-energized Coil Leakage Current ■ Short Circuit Protection Short Circuit Threshold I Coil A + I Coil B Short Circuit Turn-Off Delay -1 0.75 -100 2.00 210 80 222 0.35 VCC - 0.9V VCC - 1.0V VCC - 1.1V VCC - 1.2V ±100 µA 275 400 5 mVDC VDC µA mA ½ mH %/¡C VDC VDC VDC VDC mA µs * Voltage across the coils shall be measured at the specific voltages, but shall also be within linearly interpolated limits. Package Lead Description PACKAGE LEAD # 8L PDIP 1 2 3 4 5 6 7 8 LEAD SYMBOL FUNCTION Gnd COILA+ COILASENSOR SELECT COILBCOILB+ VCC Ground connection. Output stage, when active, this lead supplies current to COIL A. Output stage, when active, this lead 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 lead supplies current to COIL B. Output stage, when active, this lead supplies current to COIL B. Supply Voltage. 2 CS4161 Circuit Operation Speed Sensor Input Short Circuit SENSOR is a PNP comparator input which accepts either 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 1.5mA. It has an active clamp set to zero volts to prevent negative input voltages from disrupting normal operation. The sensor input can withstand 150VDC as long as the input current is limited to 1.5mA max. using a series resistor of 100k½. VCC Q1 Q3 Sense Resistor Coil Q2 Q4 Short Circuit Gnd Sense Resistor 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. Figure 1: Coil Driver Output 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 Output State Table Coil A Coil B 0 1 2 3 4 5 6 7 + OFF OFF + + + + + OFF OFF Figure 2: Divide by 1 SELECT Mode DIVIDE BY TWO MODE SELECT = Gnd The polarity definition for the coil driver outputs is as follows: Connect Connect Polarity Coil + Coil Positive (+) VCC Gnd Negative (-) Gnd VCC Divider Select Input The speed sensor input frequency is either divided by one or divided by two depending on the state of the SELECT input as follows: Logic 0 = divide by 2 Figure 3: Divide by 2 SELECT Mode Logic 1 = divide by 1 Odometer Application Diagram COIL A C1 - 10µF C2 - 0.1µF C3 - 0.01µF R1 - 3.9½, 500mW R2 - 100k½ R3 - 15k½ D1 - 1A, 600PIV Z1 - 50V, 500mW COIL A - 210 ±12½, 80mH COIL B - 210 ±12½, 80mH COILA+ COIL B COILAÐ COILB+ CS4161 VCC D1 R1 IGN Z1 C1 R3 Buffered Speed Signal (Open Collector Drive) R2 C3 3 C2 SELECT COILBÐ SENSOR Gnd Overvoltage and Short Circuit Protection CS4161 Package Specification PACKAGE THERMAL DATA PACKAGE DIMENSIONS IN mm (INCHES) D Lead Count Metric Max Min 10.16 9.02 8L PDIP Thermal Data RQJC typ English Max Min .400 .355 RQJA 8L PDIP 52 ûC/W 100 ûC/W typ Plastic DIP (N); 300 mil wide 7.11 (.280) 6.10 (.240) 8.26 (.325) 7.62 (.300) 1.77 (.070) 1.14 (.045) 2.54 (.100) BSC 3.68 (.145) 2.92 (.115) .356 (.014) .203 (.008) 0.39 (.015) MIN. .558 (.022) .356 (.014) REF: JEDEC MS-001 D Ordering Information Part Number CS4161XN8 Rev. 1/28/97 Some 8 and 16 lead packages may have 1/2 lead at the end of the package. All specs are the same. Cherry Semiconductor Corporation reserves the right to make changes to the specifications without notice. Please contact Cherry Semiconductor Corporation for the latest available information. Description 8L PDIP 4 © 1999 Cherry Semiconductor Corporation