ONSEMI CS8441

CS8441
Stepper Motor Driver
with Divide by Select
http://onsemi.com
DIP–8
N SUFFIX
CASE 626
8
1
PIN CONNECTIONS AND
MARKING DIAGRAM
COILA+
COILA–
SENSOR
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
8
1
GND
A
WL, L
YY, Y
WW, W
CS8441YN8
AWL
YYWW
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.
VCC
COILB+
COILB–
SELECT
= Assembly Location
= Wafer Lot
= Year
= Work Week
ORDERING INFORMATION
Device
CS8441YN8
Package
Shipping
DIP–8
50 Units/Rail
VCC
SENSOR
Coil
Driver
A
Input
Comp.
Sequencer
SELECT
COILA+
COILA–
Overvoltage
and
Short Circuit
Protection
1
2
Coil
Driver
B
GND
COILB+
COILB–
Figure 1. Block Diagram
 Semiconductor Components Industries, LLC, 2001
February, 2001 – Rev. 3
1
Publication Order Number:
CS8441/D
CS8441
ABSOLUTE MAXIMUM RATINGS*
Rating
Value
Unit
–0.5 to 24
–0.5 to 60
V
V
–0.3 to VCC + 0.3
V
Storage Temperature Range (TSTG)
–65 to 150
°C
Junction Temperature Range
–40 to 150
°C
2.0
kV
260 peak
°C
Supply Voltage (VCC) (Note 1.):
Continuous
100 ms Pulse Transient
Input Voltage (VIN)
ESD (Human Body Model)
Lead Temperature Soldering:
Wave Solder: (through hole styles only) (Note 2.)
1. –40°C to +125°C.
2. 10 second maximum.
*The maximum package power dissipation must be observed.
ELECTRICAL CHARACTERISTICS (–40°C ≤ TA ≤ 125°C, 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
Test Conditions
Min
Typ
Max
Unit
6.5
6.5
–
–
–
–
15.5
24
35
VDC
VDC
VDC
–
24
35
mA
–
16
–
23
V
Input Frequency Range
–
–
0.2
1.0
kHz
Switching Threshold
–
1.2
–
2.4
VDC
Hysteresis
–
300
500
–
mVDC
0.8 VDC ≤ VIN ≤ VCC
–
0.1
±1.0
µA
–
0
–
VCC
VDC
Supply, VCC
Supply Voltage Range
–40°C ≤ TA ≤ 125°C
–40°C ≤ TA ≤ 25°C
Transient Pulse, 100 ms
Supply Current
VCC = 15.5 VDC, Outputs not loaded.
Overvoltage Shutdown
Speed Sensor Input, SENSOR
Input Bias Current
Input Voltage Range
Operating Input Voltage
10 kΩ Resistor in Series
–
–
–15 to VCC
VDC
Input Clamp Current
I Clamp at VIN = 0 VDC
–
–0.4
–5.0
mA
Divider Select Input, SELECT
Logic 0 Input Voltage
–
–
–
100
mVDC
Logic 1 Input Voltage
–
3.0
–
VCC
VDC
Logic 0 Input Current
0 V ≤ VIN ≤ 100 mV
–
–1.0
–100
µA
Logic 1 Input Current
3.0 V ≤ VIN ≤ 15.5 VDC
–
0.75
2.0
mA
198
210
222
Ω
–
80
–
mH
–
–
0.35
%/°C
VCC – 1.5 V
VCC – 1.6 V
VCC – 1.75 V
VCC – 2.0 V
VCC – 0.9 V
VCC – 1.0 V
VCC – 1.1 V
VCC – 1.2 V
–
–
–
–
VDC
VDC
VDC
VDC
–
–
±100
µA
Coil Output Drivers
Coil Load
+25°C
Coil Inductance
–
Coil Resistance Temperature
Coefficient
Energized Coil Voltage (Note 3.)
(Both Polarities) A and B
VCC = 6.5 VDC
VCC = 10 VDC
VCC = 15.5 VDC, –20°C ≤ TA ≤ 125°C
VCC = 15.5 VDC, –40°C ≤ TA ≤ –20°C
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) (–40°C ≤ TA ≤ 125°C, 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
Test Conditions
Min
Typ
Max
Unit
Short Circuit Threshold
I Coil A + I Coil B
–
–
275
400
mA
Short Circuit Turn–Off Delay
–
–
5.0
–
µs
Short Circuit Protection
PACKAGE PIN DESCRIPTION
PACKAGE PIN #
DIP–8
PIN SYMBOL
1
GND
2
COILA+
Output stage, when active, this pin supplies current to COIL A.
3
COILA–
Output stage, when active, this pin 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 pin supplies current to COIL B.
7
COILB+
Output stage, when active, this pin supplies current to COIL B.
8
VCC
FUNCTION
Ground connection.
Supply voltage.
CIRCUIT OPERATION
SPEED SENSOR INPUT
Table 1. Transition States
State
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 kΩ.
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.
Coil A
Coil B
0
+
+
1
OFF
+
2
–
+
3
–
OFF
4
–
–
5
OFF
–
6
+
–
7
+
OFF
The polarity definition for the coil driver outputs is as
follows:
Polarity
Connect Coil +
Connect Coil –
Positive (+)
VCC
GND
Negative (–)
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
Sense
Resistor
Q3
Q1
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 #
0
1
2
3
4
5
6
7
SSI
Coil A
Coil B
Figure 4. Divide by 2 (16 Step Mode), SELECT = 0
http://onsemi.com
4
0
Overvoltage
and
Short Circuit
Protection
CS8441
COIL A
210 ±12 Ω
80 mH
COILA+
D1
1.0 A
600 PIV
IGN
COILA–
VCC
R1
3.9 Ω
500 mW
Buffered Speed Signal
(Open Collector Drive)
R3
15 kΩ
Z1
50 V
500 mW
C1
10 µF
C2
0.1 µF
C3
0.01 µF
R2
100 kΩ
Figure 5. Odometer Application Diagram
http://onsemi.com
5
COIL B
210 ±12 Ω
80 mH
COILB+
COILB–
CS8441
SENSOR
SELECT
GND
CS8441
PACKAGE DIMENSIONS
DIP–8
N SUFFIX
CASE 626–05
ISSUE L
8
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.
5
–B–
1
4
DIM
A
B
C
D
F
G
H
J
K
L
M
N
F
–A–
NOTE 2
L
C
J
–T–
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
N
SEATING
PLANE
D
M
K
G
H
0.13 (0.005)
M
T A
M
B
M
PACKAGE THERMAL DATA
Parameter
DIP–8
Unit
RΘJC
Typical
52
°C/W
RΘJA
Typical
100
°C/W
http://onsemi.com
6
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
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: [email protected]
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
CENTRAL/SOUTH AMERICA:
Spanish Phone: 303–308–7143 (Mon–Fri 8:00am to 5:00pm MST)
Email: ONlit–[email protected]
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–[email protected]
JAPAN: ON Semiconductor, Japan Customer Focus Center
4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–0031
Phone: 81–3–5740–2745
Email: [email protected]
EUROPE: LDC for ON Semiconductor – European Support
German Phone: (+1) 303–308–7140 (Mon–Fri 2:30pm to 7:00pm CET)
Email: ONlit–[email protected]
French Phone: (+1) 303–308–7141 (Mon–Fri 2:00pm to 7:00pm CET)
Email: ONlit–[email protected]
English Phone: (+1) 303–308–7142 (Mon–Fri 12:00pm to 5:00pm GMT)
Email: [email protected]
ON Semiconductor Website: http://onsemi.com
EUROPEAN TOLL–FREE ACCESS*: 00–800–4422–3781
*Available from Germany, France, Italy, UK, Ireland
For additional information, please contact your local
Sales Representative.
http://onsemi.com
8
CS8441/D