CS4161

CS4161 CHERRY | Alldatasheet

Document overview

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Technical content

Features

B Coil Driver A Overvoltage and Short Circuit Protection Sequencer COILB + COILA- COILA+Input Comp. ¸ 1 Gnd VCC ¸ 2 n Undervoltage Lockout n Cross-conduction Prevention Logic n Divide by 1 and Divide by 2 Modes n Guaranteed Monotonic n On Chip Flyback Diodes n Fault Protection Overvoltage Load Dump Protection to 60V Package Option

8 Lead PDIP

85mA Dual H-Bridge Odometer Driver with Divide by Select and UVLO 1Gnd COILA+ COILAÐ SENSOR VCC COILB+ COILBÐ SELECT CS4161

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 revolu- tion in the divide by 1 mode; 16 step sequence in the divide by 2 mode. The H-Bridge is capable of deliver- ing 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 out- put 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. The CS4161 includes overvoltage and short circuit protection circuit- ry. It is lead for lead compatible with the CS- 8441. The CS4161 includes an additional undervoltage lockout (UVLO) function which dis- ables the output stage until the sup- ply voltage rises above 5.6V, typi- cally. The UVLO has hysteresis to prevent any power up glitching. Block Diagram Absolute Maximum Ratings Lead Temperature Soldering Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi.com Web Site: www.cherry-semi.com A Company ¨ Rev. 1/28/97

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 TEST CONDITIONS MIN TYP MAX UNIT CS4161 Package Lead Description PACKAGE LEAD # LEAD SYMBOL FUNCTION 8L PDIP 1 Gnd Ground connection. 2 COILA+ Output stage, when active, this lead supplies current to COIL A. 3 COILA- Output stage, when active, this lead supplies current to COIL A. 4 SENSOR Input signal from wheel speed or engine rpm. 5 SELECT Selects divide by 1 or divide by 2 mode. 6 COILB- Output stage, when active, this lead supplies current to COIL B. 7 COILB+ Output stage, when active, this lead supplies current to COIL B. CC Supply Voltage. n Supply, VCC Supply Voltage Range -40¡C ² TA ² 105¡C 6.5 15.5 V DC -40¡C ² TA ² 25¡C 6.5 24.0 V DC Transient Pulse, 100ms 35.0 V DC Supply Current V CC = 15.5 VDC, Outputs not loaded 24 35 mA Overvoltage Shutdown 16 23 V Undervoltage Lockout Voltage V CC Initial Power up 5.1 5.6 6.1 V UVLO Hysteresis 200 600 1000 mV n Speed Sensor Input, SENSOR Input Frequency Range 0.2 1.0 kHz Switching Threshold 1.2 2.6 V DC Hysteresis 300 500 mV DC Input Bias Current 0.8V DC ²V IN ²V CC 0.1 ±1.0 µA Input Voltage Range 0 V CC VDC Operating Input Voltage 10k½ Resistor in Series -15 to V CC VDC Input Clamp Current I Clamp at V IN = 0VDC -0.4 -5.0 mA n Divider Select Input, SELECT Logic 0 Input Voltage 100 mV DC Logic 1 Input Voltage 3.0 V DC Logic 0 Input Current 0V ² V IN ² 100mV -1 -100 µA Logic 1 Input Current 3V ² V IN ² 15.5 VDC 0.75 2.00 mA n Coil Output Drivers Coil Load +25¡C 198 210 222 ½ Coil Inductance 80 mH Coil Resistance Temperature Coefficient 0.35 %/¡C * Energized Coil Voltage V CC = 6.5 VDC VCC - 1.5V V CC - 0.9V V DC (Both Polarities) A and B V CC = 10.0 VDC VCC - 1.6V V CC - 1.0V V DC VCC = 15.5 VDC, -20¡C ² TA ² 105¡C V CC - 1.75V VCC - 1.1V V DC VCC = 15.5 VDC, -40¡C ² TA ² -20¡C V CC - 2.0V V CC - 1.2V V DC De-energized Coil Leakage Current ±100 µA n Short Circuit Protection Short Circuit Threshold 275 400 mA I Coil A + I Coil B Short Circuit Turn-Off Delay 5 µs * Voltage across the coils shall be measured at the specific voltages, but shall also be within linearly interpolated limits.

SENSOR is a PNP comparator input which accepts either a sine wave or a square wave input. This input is protected from excur- sions above V CC as well as any below ground as long as the cur- rent is limited to 1.5mA. It has an active clamp set to zero volts to prevent negative input voltages from disrupting normal opera- tion. The sensor input can withstand 150V DC as long as the input current is limited to 1.5mA max. using a series resistor of 100k½. 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 The polarity definition for the coil driver outputs is as follows: Connect Connect Polarity Coil + Coil - Positive (+) V CC Gnd Negative (-) Gnd V CC The speed sensor input frequency is either divided by one or divid- ed by two depending on the state of the SELECT input as follows: Logic 0 = divide by 2 Logic 1 = divide by 1 Divider Select Input Output State Table State Coil A Coil B 0+ +

1 OFF +

5 OFF -

Figure 1: Coil Driver Output Figure 3: Divide by 2 SELECT Mode DIVIDE BY TWO MODE SELECT = Gnd COILA+ COILAÐ COILB+ COILBÐ VCC SELECT Gnd SENSORCS4161 IGN D1 R1 Z1 C1 C2 R2 C3 Buffered Speed Signal (Open Collector Drive) COIL A COIL B Odometer Application Diagram 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 Figure 2: Divide by 1 SELECT Mode

RQJC typ 52 ûC/W RQJA typ 100 ûC/W CS4161 D Lead Count Metric English Max Min Max Min 8L PDIP 10.16 9.02 .400 .355 Package Specification PACKAGE DIMENSIONS IN mm (INCHES)

Ordering Information

Rev. 1/28/97 © 1999 Cherry Semiconductor Corporation Cherry Semiconductor Corporation reserves the right to make changes to the specifications without notice. Please contact Cherry Semiconductor Corporation for the latest available information. Plastic DIP (N); 300 mil wide 0.39 (.015) MIN. 1.14 (.045) D Some 8 and 16 lead packages may have 1/2 lead at the end of the package. All specs are the same. .203 (.008) .356 (.014) REF: JEDEC MS-001 3.68 (.145) 2.92 (.115) 8.26 (.325) 7.62 (.300) 7.11 (.280) 6.10 (.240) .356 (.014) .558 (.022)