LS7290

Overview

The LS7290 is a stepper motor controller designed for general-purpose applications, supporting both bipolar and unipolar motor configurations. It integrates Power MOSFET technology to generate Phase Drive and PWM outputs, enabling control of two-phase bipolar or four-phase unipolar motors. The device offers selectable full and half-step modes, with support for up to 1/32 microstepping. Key control inputs include Enable, Step, Direction, and Reset signals. Available in compact packages such as 24-pin TSSOP and 24-pin PDIP, it provides reliable operation for motion control systems.

Feature Summary

• Supports both bipolar and unipolar stepper motor configurations
• Integrates Power MOSFET technology for drive outputs
• Provides selectable full and half-step operating modes
• Includes dedicated control inputs for enable, step, direction, and reset

Applications

• General-purpose stepper motor control systems
• Motion control applications requiring precise positioning
• Automation equipment utilizing bipolar or unipolar motors

Procurement Notes

Verify the specific package type (TSSOP or PDIP) and manufacturer designation when sourcing, as listings may vary between LSI Computer Systems and LSI/CSI branding. Confirm that the component matches the required stepping mode capabilities and input signal compatibility for your design. Ensure authenticity through authorized channels to avoid counterfeit parts affecting motor performance.

Selection Notes

Select this controller when bipolar or unipolar stepper motor management is required without external driver complexity. Consider the available package options based on board space constraints. Verify that the integrated Power MOSFET outputs meet the current requirements of the target motor. Ensure the control interface aligns with the system's logic levels for step, direction, and enable signals.

Part Context

The LS7290 belongs to the family of stepper motor controllers produced by LSI Computer Systems, now associated with LSI/CSI. This manufacturer specializes in custom and standard integrated circuits for various electronic domains, including motion control and industrial automation. The LS7290 represents a solution for integrating motor driving functions into compact designs using established semiconductor processes.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult official distributor databases or manufacturer cross-reference guides for compatible alternatives if the LS7290 is unavailable.