L6258EX

Overview

The L6258EX is a dual full-bridge motor driver implemented in BCD technology, designed for controlling bipolar stepper motors or bidirectional DC motors. It features a DMOS power stage capable of sustaining up to 40V with continuous output current of 1.5A per winding and peak start-up current up to 2A. The device operates within a supply voltage range of 12V to 40V and includes integrated recirculation diodes. Key electrical parameters include a typical switching frequency of 18.5kHz, minimum operating temperature of -55°C, and maximum junction temperature of 150°C. The converter rated power is 5.3W.

Feature Summary

• High-efficiency phase shift chopping for low current ripple at minimal control levels
• Integrated thermal protection circuitry that disables outputs upon exceeding safe temperature limits
• TTL/CMOS compatible inputs eliminating the need for external level shifting
• Four-quadrant current control supporting microstepping and precise DC motor regulation

Applications

• Bipolar stepper motor drive systems
• Bidirectional brushed DC motor control
• Precision positioning applications requiring microstepping
• Industrial automation equipment

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors. Confirm package integrity and pin alignment prior to assembly. Review datasheet specifications for environmental compliance and handling requirements. Ensure design compatibility with system voltage and thermal constraints before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high-current driving capabilities within a compact PowerSO-36 package. Consider the 1.5A continuous current rating and 40V voltage tolerance for robust motor control designs. Evaluate thermal management solutions given the 150°C junction temperature limit. Verify interface compatibility with TTL/CMOS logic controllers for seamless integration.

Part Context

The L6258EX belongs to the L6258EX series of universal motor drivers from STMicroelectronics. It utilizes DMOS technology to provide efficient power switching within a single integrated circuit. The device combines control logic and power stages to simplify motor drive circuit design, offering a complete solution for driving two windings of a bipolar stepper motor or two separate DC motors.

Replacement Considerations

E-L6258E and E-L6258EA are listed as parameter-equivalent alternatives.