Controller ICs are available for bipolar and unipolar motors.
June 11, 2009 -
Models LS8297, LS8297CT, and LS8397 Stepper Motor Controller ICs offer half-step and full-step sequences in both normal drive and wave drive modes. LS8297CT and LS8397 models offer correction for torque-ripple, while LS8397 is also available with power saving holding-torque mode for maintaining drivers at reduced power level when motor is not turning. Four phase outputs and 2 inhibit outputs are provided for driving external H-bridge drivers, allowing for selection of standard driver.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
LSI Computer Systems, Inc.
1235 Walt Whitman Rd
Melville, NY, 11747
USA
Precision, Low Cost, Stepper Motor Controller ICs for Bipolar and Unipolar Motors
Melville, NY, June 5, 2009 - LSI/CSI announces the availability of three new high performance stepper motor controller ICs. Designated LS8297, LS8297CT and LS8397, these ICs can replace the expensive L297 in all applications, while providing additional features not available in L297. According to Pete Visconti, LSI's VP Sales and Marketing, all these devices offer half-step and full-step sequences in both normal drive and wave drive modes similar to the L297. In addition the LS8297CT and the LS8397 offer correction for the torque-ripple, not provided in L297 half-step sequence. A power saving holding-torque mode is also available in LS8397 for maintaining the drivers at a reduced power level when the motor is not turning. Four phase outputs and two inhibit outputs are provided for driving external H-bridge drivers, allowing for the selection of a standard driver, such as the popular L298 or an application specific custom driver. An external reference voltage, in conjunction with the winding current sense voltages, regulate the PWM duty cycles of the driver outputs. One of two decay modes, fast-decay and slow-decay, can be selected to suit the characteristics of the motor winding.
LS8297 and LS8297CT features include:
o Pin-for-pin cost effective replacement for L297
o Half and full step sequences
o Normal-drive/wave-drive
o Torque ripple correction in LS8297CT
o PWM chopper circuit for motor current control
o Inputs for step, forward/reverse, reset and output blanking control
o Supply current < 400µA
o Supply voltage: 4.5V to 7V
LS8397 includes all of the above plus a mode for reduced power holding torque.
LS8297 and LS8297CT are available in available in 20-pin DIP, SOIC and TSSOP packages
LS8397 is available in 24-pin DIP, SOIC and TSSOP packages
Unit price for LS8297 in 1k quantity, any package, is $2.00.
Unit price for LS8297CT in 1k quantity, any package, is $2.25.
Unit price for LS8397 in 1k quantity, SOIC and TSSOP packages, is $2.50.
Unit price for LS8397 in 1k quantity, DIP package, is $2.60.
The complete Data Sheet for these devices, as well as all of our Standard Products, can be found by visiting our Web Site, www.lsicsi.com. For more information, including price quotes and technical assistance, please contact sales@lsicsi.com.
About LSI Computer Systems, Inc.
LSI Computer Systems, Inc. (LSI/CSI) began operations as the world's first fabless semiconductor company in 1969. Since its inception, LSI/CSI has been a leader in the design and production of affordable full custom and standard mixed signal, digital and analog integrated circuits. Using a broad array of process technologies, LSI/CSI has produced ICs that extend from the consumer and industrial marketplace to military and aerospace applications. The company's proven expertise and strong reputation have made LSI/CSI the IC provider of choice for leading manufacturers in a broad range of industries.
For more information, please contact:
LSI Computer Systems, Inc.
1235 Walt Whitman Road
Melville, New York 11747
Phone: 631 271-0400
Fax: 631 271-0405
Visit: www.lsicsi.com
Email: sales@lsicsi.com
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