L6228PD

Overview

The L6228PD is a DMOS fully integrated stepper motor driver manufactured by STMicroelectronics, designed for driving two-phase bipolar stepper motors. It utilizes BCD technology to combine isolated DMOS power transistors with CMOS and bipolar circuits on a single chip. The device operates within an operating supply voltage range of 8V to 52V and delivers a typical output peak current of 2.8A (1.4A RMS). It features a typical RDS(ON) of 0.73Ω at Tj=25°C and supports operating frequencies up to 100kHz. The component is housed in a PowerSO36 package.

Feature Summary

• Integrates dual DMOS full bridges with constant off-time PWM current controllers for chopping regulation and phase sequence generation.
• Includes non-dissipative overcurrent protection on high-side power MOSFETs alongside thermal shutdown and undervoltage lockout.
• Provides fast/slow decay mode selection and fast decay quasi-synchronous rectification capabilities.
• Features decoding logic for stepper motor full and half-step drive with cross-conduction protection.

Applications

• Industrial automation systems
• Motion control applications
• Ignition controller designs

Procurement Notes

Verify the specific suffix 'PD' against the manufacturer's official datasheet to confirm the exact package type and tape-and-reel specifications. Ensure that the PowerSO36 pinout matches your PCB layout requirements. Confirm operational temperature ranges align with your system environment before finalizing procurement.

Selection Notes

Select this component when a fully integrated solution for bipolar stepper motors is required without external discrete power stages. It is suitable for designs needing integrated current regulation and protection features. Consider the PowerSO36 package constraints regarding thermal dissipation and board space availability during the design phase.

Part Context

The L6228PD belongs to the L6228 series of motor drivers from STMicroelectronics. This family includes variants such as the L6228Q and other related models like the L6208PD. These devices are part of ST's broader portfolio of motor control ICs, which also encompasses brushed DC and universal motor drivers.

Replacement Considerations

The L6228Q is a documented variant within the same product family. Verify compatibility regarding package differences and electrical parameter tolerances before substitution. Consult official documentation for any functional distinctions between the PD and Q suffixes.