L6258E

Overview

The L6258E is a dual full-bridge motor driver implemented in BCD technology, designed for controlling bipolar stepper motors or bidirectionally driving two DC motors. It operates within a supply voltage range of 12V to 40V and delivers a continuous output current of 1.2A per winding, with peak start-up currents reaching 1.5A. The device features high-efficiency phase-shift chopping for low current ripple and includes integrated recirculation diodes. It utilizes a 36-pin PowerSO surface-mount package and incorporates thermal protection circuitry that disables outputs when safe temperature limits are exceeded.

Feature Summary

• Dual full-bridge architecture capable of driving bipolar stepper motor windings or two DC motors
• High-efficiency phase-shift chopping for precise PWM control and minimal current ripple
• Integrated cross-conduction protection and thermal shutdown safety mechanisms
• TTL/CMOS compatible inputs requiring no external recirculation diodes

Applications

• Bipolar stepper motor control systems
• Bidirectional DC motor drive applications
• Microstepping implementations requiring four-quadrant current control
• General-purpose motor control circuits

Procurement Notes

Verify the specific suffix against official ST documentation, as variants like L6258EX may indicate obsolete status while E-L6258E represents active production. Confirm package dimensions and pinout compatibility during integration. Ensure thermal management solutions align with the 150°C junction temperature limit specified in datasheets. Cross-reference ordering part numbers with manufacturer catalogs to avoid procurement errors related to discontinued sub-types.

Selection Notes

Select this component for applications requiring robust DMOS power stages with integrated logic control. The wide voltage range supports diverse power supplies, while the 1.2A continuous rating suits moderate load requirements. Consider the 36-pin PowerSO footprint for PCB layout constraints. Evaluate thermal dissipation needs based on ambient conditions and current loads to ensure reliable operation within the specified temperature range.

Part Context

The L6258E belongs to STMicroelectronics' universal motor driver family, utilizing BCD technology for high-performance control. It serves as a complete solution by integrating power switches, logic, and protection circuits. This series is engineered for efficiency and reliability in motor control environments, offering a compact alternative to discrete driver designs.

Replacement Considerations

E-L6258EA is documented as a parameter-equivalent substitute.