L6228PDTR

Overview

The L6228PDTR is a fully integrated DMOS stepper motor driver manufactured by STMicroelectronics, designed for driving two-phase bipolar stepper motors. It operates within an 8 V to 52 V supply voltage range and delivers a continuous output current of 1.4 A with a peak capability of 2.8 A. The device utilizes BCD technology to combine isolated DMOS power transistors with CMOS and bipolar circuits on a single chip. It features non-dissipative overcurrent protection, thermal shutdown, and undervoltage lockout. The component is housed in a PowerSO-36 surface-mount package and supports operating frequencies up to 100 kHz.

Feature Summary

• Integrates dual DMOS full bridges with constant off-time PWM current controllers for precise chopping regulation.
• Includes built-in decoding logic for generating full and half-step drive sequences without external microcontrollers.
• Provides fast/slow decay mode selection and quasi-synchronous rectification for optimized motor performance.
• Features non-dissipative overcurrent protection on high-side MOSFETs and cross-conduction protection.

Applications

• Industrial automation systems requiring precise motion control
• Office automation equipment such as printers and scanners
• Security systems including access control mechanisms
• Medical devices requiring reliable stepper motor actuation

Procurement Notes

Verify the specific suffix 'PDTR' corresponds to the PowerSO-36 package configuration when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure ESD handling protocols are followed due to moisture sensitivity classification. Cross-reference datasheet revisions to confirm pinout consistency with existing designs.

Selection Notes

Select this component for applications requiring a fully integrated solution with internal step generation. It is suitable for bipolar stepper motors needing up to 1.4 A continuous current. Consider the PowerSO-36 package for thermal management requirements. Evaluate the need for external logic if higher resolution stepping beyond half-step is required.

Part Context

This part belongs to the L6228 series of DMOS motor drivers from STMicroelectronics. It is distinct from the L6228DTR which uses a 24-SO package. The PDTR variant specifically denotes the PowerSO-36 surface-mount option. It serves as a complete driver solution combining control and power stages for bipolar stepper motors.

Replacement Considerations

L6228QTR offers similar functionality but in a VFQFPN-32 package with different thermal characteristics. L6228DTR provides the same electrical performance in a 24-SO package. Verify package dimensions and pin compatibility before substitution.