LV8731V-M-TLM-H

Overview

The LV8731V-M-TLM-H is a bipolar stepper motor driver IC from onsemi, designed for micro-step drive applications. It features a 2-channel H-bridge architecture capable of supporting 4W 1-2 phase excitation modes. The device integrates PWM constant-current control to manage motor performance efficiently. It operates within a supply voltage range of 9V to 32V and supports output currents up to 2A per channel. The internal resistance is specified at 550mΩ. The component is housed in a 44-pin SSOP package with an exposed pad (SSOP-44-EP) measuring 5.6mm, suitable for surface mount assembly.

Feature Summary

• Integrates a 2-channel H-bridge topology for precise bipolar stepper motor control
• Supports micro-step driving capabilities with selectable resolution options
• Features built-in PWM constant-current regulation for stable motor operation
• Includes protection mechanisms against overcurrent and thermal conditions

Applications

• Precision positioning systems in office automation equipment
• Industrial motion control modules requiring micro-stepping
• Automated printing and scanning devices
• Medical instrumentation with accurate linear actuation needs

Procurement Notes

Verify the exact suffix designation during procurement, as variations such as TLM-H or MPB-H may indicate different packaging or temperature grades. Confirm RoHS compliance status and lead-free specifications with the manufacturer prior to ordering. Ensure that the 44-pin SSOP footprint matches the target PCB layout constraints. Request official datasheets to validate electrical parameters against specific application requirements before finalizing supply chain agreements.

Selection Notes

Select this component when designing systems requiring high-resolution micro-stepping for bipolar stepper motors. The integrated H-bridge and constant-current control simplify driver circuit design by reducing external component count. Consider the 9V-32V operating range for compatibility with standard industrial power supplies. Evaluate the thermal performance of the SSOP-44-EP package for heat dissipation in enclosed environments. Compare current ratings against load requirements to ensure adequate margin for peak torque operations.

Part Context

This part belongs to the LV8731 series of motor drivers from onsemi, which are optimized for office equipment and precision motion applications. The series typically includes variants like LV8731V and LV8731V-TLM-H. These chips utilize BiCDMOS technology to combine logic and power stages on a single die. The family focuses on providing efficient drive solutions with minimal external support components, targeting cost-sensitive yet performance-critical markets.

Replacement Considerations

Direct substitutes include other onsemi parts within the same family, such as the LV8731V or LV8731V-TLM-H, provided pinout and electrical characteristics align. Cross-manufacturer replacements require careful verification of H-bridge configurations and current handling capabilities. Ensure any alternative supports the required micro-step resolution and voltage range. Validate thermal management requirements if substituting with packages having different thermal resistance profiles.