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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 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 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.
Features
s Undervoltage Lockout s Cross-conduction Prevention Logic s Divide by 1 and Divide by 2 Modes s Guaranteed Monotonic s On Chip Flyback Diodes s Fault Protection Overvoltage Load Dump Protection to 60V
Absolute Maximum Ratings Supply Voltage (VCC) (continuous) -40uC to +105uC .......................-0.5 to 24V (100ms pulse transient) -40uC to +105uC...........................-0.5 to 60V Input Voltage (VIN) ...................................................................-0.3 to VCC +0.3V Operating Temperature Range ....................................................-40C to 105C Storage Temperature Range (TSTG) ...........................................-65C to 150C Junction Temperature Range .......................................................-40C to 150C ESD (Human Body Model) .............................................................................2kV Lead Temperature Soldering Wave Solder (through hole styles only)............10 sec. max, 260C peak Block Diagram
V CC
Package Option
8 Lead PDIP
Gnd 1 COILA+ COILA VCC COILB+ COILB SELECT
SENSOR
Input Comp.
Coil Driver A
SENSOR
COILA+ COILA-
Sequencer
Overvoltage and Short Circuit Protection
SELECT
1 2 Coil Driver B COILB + COILB-
Gnd
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
Rev. 1/28/97
1
A
Company
CS4161
Electrical Characteristics: Unless otherwise stated, these specifications apply for -40C TA 105C, 6.5V VCC 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
s Supply, VCC Supply Voltage Range
Supply Current Overvoltage Shutdown Undervoltage Lockout Voltage
-40C TA 105C -40C TA 25C Transient Pulse, 100ms VCC = 15.5 VDC , Outputs not loaded VCC Initial Power up UVLO Hysteresis
6.5 6.5 24 16 5.1 200 5.6 600
15.5 24.0 35.0 35 23 6.1 1000
VDC VDC VDC mA V V mV
s Speed Sensor Input, SENSOR Input Frequency Range Switching Threshold Hysteresis Input Bias Current Input Voltage Range Operating Input Voltage Input Clamp Current s Divider Select Input, SELECT Logic 0 Input Voltage Logic 1 Input Voltage Logic 0 Input Current Logic 1 Input Current s Coil Output Drivers Coil Load Coil Inductance Coil Resistance Temperature * Energized Coil Voltage (Both Polarities) A and B
0.2 1.2 300 0.8VDC VIN VCC 0 10k1/2 Resistor in Series I Clamp at VIN = 0VDC -0.4 500 0.1
1.0 2.6 1.0 VCC -15 to VCC -5.0
kHz VDC mVDC A VDC VDC mA
100 3.0 0V VIN 100mV 3V VIN 15.5 VDC -1 0.75 -100 2.00
mVDC VDC A mA
+25C
198
210 80 VCC - 0.9V VCC - 1.0V VCC - 1.1V VCC - 1.2V 100
222 0.35
Coefficient VCC - 1.5V VCC = 6.5 VDC VCC = 10.0 VDC VCC - 1.6V VCC = 15.5 VDC, -20C TA 105C VCC - 1.75V VCC = 15.5 VDC, -40C TA -20C VCC - 2.0V
1/2 mH %/C VDC VDC VDC VDC
De-energized Coil Leakage Current s Short Circuit Protection Short Circuit Threshold I Coil A + I Coil B Short Circuit Turn-Off Delay
A
275 5
400
mA s
* Voltage across the coils shall be measured at the specific voltages, but shall also be within linearly interpolated limits.
Package Lead Description
PACKAGE LEAD # LEAD SYMBOL FUNCTION
8L PDIP 1 2 3 4 5 6 7 8
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
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 100k1/2.
Short Circuit VCC Q1 Q3 Sense Resistor Overvoltage and Short Circuit Protection
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. 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
Figure 1: Coil Driver Output
State
0 1 2 3 4 5 6 7
Output State Table Coil A
+ OFF OFF + +
Coil B
+ + + 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 Logic 1 = divide by 1
Figure 3: Divide by 2 SELECT Mode
Odometer Application Diagram
COIL A COIL B
C1 - 10F C2 - 0.1F C3 - 0.01F R1 - 3.91/2, 500mW R2 - 100k1/2 R3 - 15k1/2 D1 - 1A, 600PIV Z1 - 50V, 500mW COIL A - 210 121/2, 80mH COIL B - 210 121/2, 80mH
COILA+
COILA
COILB+
COILB
CS4161
SENSOR
VCC D1 IGN Z1 R3 Buffered Speed Signal (Open Collector Drive) C1 C2 R1
SELECT
Gnd
R2
C3
3
CS4161
Package Specification
PACKAGE DIMENSIONS IN mm (INCHES) PACKAGE THERMAL DATA
D Lead Count 8L PDIP Metric Max Min 10.16 9.02 English Max Min .400 .355
Thermal Data RQJC typ RQJA typ
8L PDIP 52 100
uC/W uC/W
Plastic DIP (N); 300 mil wide
7.11 (.280) 6.10 (.240)
8.26 (.325) 7.62 (.300) 3.68 (.145) 2.92 (.115)
1.77 (.070) 1.14 (.045)
2.54 (.100) BSC
.356 (.014) .203 (.008)
0.39 (.015) MIN. .558 (.022) .356 (.014) Some 8 and 16 lead packages may have 1/2 lead at the end of the package. All specs are the same.
REF: JEDEC MS-001
D
Ordering Information
Part Number CS4161XN8
Rev. 1/28/97
Description 8L PDIP 4
Cherry Semiconductor Corporation reserves the right to make changes to the specifications without notice. Please contact Cherry Semiconductor Corporation for the latest available information.
(c) 1999 Cherry Semiconductor Corporation

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