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Cherry Semiconductor Corporation
Cherry Semiconductor Corporation

CS8441 Datasheet Preview

CS8441 Datasheet

85mA Dual H-Bridge Odometer Driver with Divide by Select

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CS8441 pdf
CS8441
85mA Dual H-Bridge Odometer Driver
with Divide by Select
Description
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 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.
Additional part protection is pro-
vided by two functions. The first
being Òshort circuit protectionÓ.
This function will protect the part in
the case of a shorted or partially
shorted load. The second protection
function is the Òovervoltage func-
tionÓ. This function monitors the
level of the supply voltage. In tran-
sient conditions such as load dump,
the part will shut down, protecting
itself.
Features
s No Cross-conduction in
either H-bridge
s Divide by 1 and Divide
by 2 Mode
s Guaranteed Monotonic
s On Chip Flyback Diodes
s Fault Protection
Overvoltage
Load Dump Protection
to 60V
Absolute Maximum Ratings
Supply Voltage (VCC) (continuous) -40ûC to +105ûC ......................Ð0.5 to 24V
(100ms pulse transient) -40ûC to +105ûC ..........................Ð0.5 to 60V
Input Voltage (VIN) ..................................................................Ð0.3 to VCC +0.3V
Storage Temperature Range (TSTG).............................................-65¡C to 150¡C
Junction Temperature Range.......................................................Ð40¡C to 150¡C
ESD (Human Body Model) .............................................................................2kV
Lead Temperature Soldering
Wave Solder(through hole styles only).............10 sec. max, 260¡C peak
Package Options
8 Lead PDIP
VCC
SENSOR
Input
Comp.
Block Diagram
Coil
Driver
A
COILA+
COILA-
Gnd 1
COILA+
COILAÐ
SENSOR
VCC
COILB+
COILBÐ
SELECT
SELECT
Gnd
¸1
¸2
Sequencer
Overvoltage
and Short
Circuit
Protection
Coil
Driver
B
COILB+
COILB-
Rev. 9/2/92
1
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



Cherry Semiconductor Corporation
Cherry Semiconductor Corporation

CS8441 Datasheet Preview

CS8441 Datasheet

85mA Dual H-Bridge Odometer Driver with Divide by Select

No Preview Available !

CS8441 pdf
Electrical Characteristics: Unless otherwise stated, these specifications apply for Ð40¡C²TA²105¡C,6.5V²VCC²15.5V. All voltage
shall be referenced to Gnd unless otherwise noted. Overvoltage shutdown of coils occurs when VCC > 16V.
PARAMETER
s Supply, VCC
Supply Voltage Range
Supply Current
Overvoltage Shutdown
TEST CONDITIONS
-40¡C ²TA²105¡C
-40¡C²TA²25¡C
Transient Pulse, 100ms
VCC = 15.5 VDC
Outputs not loaded
MIN
6.5
6.5
16
TYP
24
MAX
15.5
24.0
35.0
35
23
UNIT
VDC
VDC
VDC
mA
V
s Speed Sensor Input, SENSOR
Input Frequency Range
Switching Threshold
Hysteresis
Input Bias Current
Input Voltage Range
0.8VDC²VIN²VCC
Operating Input Voltage
10k½ Resistor in Series
Input Clamp Current
I Clamp at VIN = 0 VDC
s Divider Select Input, SELECT
Logic 0 Input Voltage
Logic 1 Input Voltage
Logic 0 Input Current
Logic 1 Input Current
0V²VIN²100mV
3V²VIN²15.5 VDC
s Coil Output Drivers
Coil Load
Coil Inductance
Coil Resistance Temperature
* Energized Coil Voltage
(Both Polarities) A and B
De-Energized Coil Leakage
Current
+25¡C
Coefficient
VCC = 6.5 VDC
VCC = 10.0 VDC
VCC = 15.5 VDC-20¡C²T105¡C
VCC = 15.5 VDC,Ð40¡C²TA²Ð20¡C
1.2
300
0
3.0
198
VCC -1.5V
VCC -1.6V
VCC-1.75V
VCC-2.0V
0.2 1.0
2.4
500
0.1 ±1.0
VCC
-15
to VCC
-0.4 -5.0
100
-1 -100
0.75 2.00
210 222
80
0.35
VCC -0.9V
VCC -1.0V
VCC -1.1V
VCC -1.2V
±100
kHz
VDC
mVDC
µA
VDC
VDC
mA
mVDC
VDC
µA
mA
½
mH
%/¡C
VDC
VDC
VDC
VDC
µA
s Short Circuit Protection
Short Circuit Threshold
I Coil A + I Coil B
Short Circuit Turn-Off Delay
275 400 mA
5 µs
* Voltage across the coils shall be measured at the specific voltages, but shall also be within linearly interpolated limits.
2


Part Number CS8441
Description 85mA Dual H-Bridge Odometer Driver with Divide by Select
Maker Cherry Semiconductor Corporation
Total Page 4 Pages
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