L6228D

Overview

The L6228D is a fully integrated DMOS stepper motor driver manufactured by STMicroelectronics, designed for bipolar stepper motors. It operates within an 8 V to 52 V supply range and delivers a peak output current of 2.8 A (1.4 A RMS). The device features a typical RDS(ON) of 0.73 Ω at 25 °C and supports operating frequencies up to 100 kHz. It is housed in a 24-SOIC package with SMD/SMT installation style. The component includes dual independent constant tOFF PWM current controllers, non-dissipative overcurrent protection, thermal shutdown, and undervoltage lockout.

Feature Summary

• Integrates isolated DMOS power transistors with CMOS and bipolar circuits on a single chip using BCD technology.
• Provides non-dissipative overcurrent protection on high-side power MOSFETs alongside thermal shutdown capabilities.
• Features fast decay quasi-synchronous rectification and selectable fast/slow decay modes for precise motor control.

Applications

• Industrial automation systems
• Bipolar stepper motor drive circuits
• Motion control applications

Procurement Notes

Verify the specific suffix 'D' indicates the SOIC-24 package variant when ordering. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure design compatibility with the required voltage and current specifications for the target application.

Selection Notes

Select this component for applications requiring a fully integrated solution for bipolar stepper motors without external power stages. Consider the 24-SOIC package for surface mount assembly requirements. Evaluate the need for integrated protection features such as thermal shutdown and overcurrent limiting against external alternatives.

Part Context

The L6228D belongs to the L6228 series of motor drivers from STMicroelectronics. This series focuses on providing complete driving solutions for stepper motors, combining control logic and power stages. The D suffix specifically denotes the SOIC-24 package option available within this product family.

Replacement Considerations

Cross-reference models include A3972, A3974, A3977, and A3979. Verify pinout compatibility and electrical parameters before substituting with these alternative part numbers.