L6208D

Overview

The L6208D is a fully integrated bipolar stepper motor driver manufactured by STMicroelectronics, utilizing DMOS technology in BCD process. It operates on an 8V to 52V supply with a peak output current of 5.6A (2.8A RMS) and features non-dissipative overcurrent protection. The device integrates dual independent constant off-time PWM current controllers, phase sequence generation, and fast/slow decay mode selection. It includes thermal shutdown, undervoltage lockout, cross-conduction protection, and integrated freewheeling diodes. Packaged in a 24-SOIC format, it supports operating frequencies up to 100kHz.

Feature Summary

• Fully integrated control and power stage for two-phase bipolar stepper motors
• Non-dissipative overcurrent protection on high-side power MOSFETs
• Dual independent constant off-time PWM current controllers for chopping regulation
• Integrated thermal shutdown and undervoltage lockout mechanisms

Applications

• Bipolar stepper motor control systems
• Industrial automation equipment
• Office automation devices

Procurement Notes

Verify the specific package type against project requirements, as the L6208 series includes both PowerSO-36 and SO-24 variants. Confirm that the 2.8A RMS continuous current rating aligns with the motor's electrical specifications. Ensure compatibility with the system's logic voltage levels and verify that the 52V maximum supply voltage meets the application's power constraints.

Selection Notes

Select this component when a single-chip solution for bipolar stepper motors is required. It is suitable for applications needing integrated current regulation and protection without external discrete components. Consider the 24-SOIC package for surface-mount assembly needs. Evaluate if the 5.6A peak current capability exceeds the motor's requirements to ensure adequate headroom.

Part Context

The L6208 belongs to the STSPIN L62 family of motor drivers from STMicroelectronics. This series focuses on providing complete drive solutions for stepper motors using DMOS technology. The L6208D specifically denotes the version packaged in a 24-pin Small Outline Integrated Circuit (SOIC) format, distinguishing it from other pin-count variants in the same functional family.

Replacement Considerations

Direct substitutes within the same family include the L6208PD (PowerSO-36 package). Other compatible drivers in the broader portfolio may include the L6207 or L6207Q, though interface and pinout differences must be verified before substitution.