LB11862MC-AH

Overview

The LB11862MC-AH is a monolithic integrated circuit designed for driving two-phase stepper motors, featuring an internal chopper control system to regulate current. It operates within a supply voltage range of 4.5 V to 30 V and supports peak output currents up to 1.5 A per channel. The device incorporates thermal shutdown protection and overcurrent limiting to ensure reliability under varying load conditions. Its compact package design facilitates integration into space-constrained motor control applications requiring precise step resolution and efficient power management.

Feature Summary

• Integrated chopper control for constant current regulation
• Built-in thermal shutdown and overcurrent protection mechanisms
• Supports full-step, half-step, and micro-stepping drive modes

Applications

• Two-phase stepper motor drives in office automation equipment
• Precision positioning systems in industrial automation controllers
• Actuator control modules in medical diagnostic devices

Procurement Notes

Verify the specific suffix 'AH' against official onsemi documentation to confirm exact temperature grade and packaging configuration. Ensure compatibility with existing PCB footprints and thermal management requirements before procurement. Cross-reference the latest datasheet revision for any updates to electrical characteristics or recommended operating conditions.

Selection Notes

Select this component when designing systems requiring integrated chopper control for two-phase stepper motors without external current sensing resistors. Consider its 30 V maximum supply voltage and 1.5 A peak current capability relative to the motor's electrical specifications. Evaluate the need for its built-in protection features against potential fault conditions in the target application environment.

Part Context

This part belongs to onsemi's family of bipolar stepper motor driver ICs. It is engineered for applications demanding reliable motion control with minimal external component count. The integration of chopper control and protection circuits distinguishes it from simpler H-bridge drivers, offering enhanced performance in precision positioning tasks across various electronic subsystems.

Replacement Considerations

Consult official cross-reference lists for direct pin-compatible alternatives. Verify that substitute parts maintain identical chopper control functionality and current ratings. Ensure replacement components meet the same thermal and electrical specifications to avoid redesigning the host system.