L6227D

Overview

The L6227D is a DMOS dual full bridge motor driver designed for brush DC and bipolar stepper motor control. It integrates two independent constant off-time PWM current controllers for chopping regulation. The device features non-dissipative overcurrent protection on high-side MOSFETs, thermal shutdown, cross-conduction protection, and undervoltage lockout. Operating supply voltage ranges from 8 V to 52 V with a peak output current of 2.8 A (1.4 A DC). Typical RDS(ON) is 0.73 Ω at Tj=25°C. It supports slow decay synchronous rectification and operates up to 100 kHz. Available in PowerSO36 and SO24 packages.

Feature Summary

• Integrates dual full bridge with independent PWM current controllers
• Includes non-dissipative overcurrent protection and thermal shutdown
• Supports slow decay synchronous rectification
• Features cross-conduction protection and undervoltage lockout

Applications

• Brushed DC motor control
• Bipolar stepper motor control
• Industrial automation systems
• Valve and solenoid driving

Procurement Notes

Verify the exact suffix against official STMicroelectronics documentation to confirm package type and temperature range. Ensure compatibility with system voltage requirements and thermal management needs. Confirm RoHS compliance status through the manufacturer's datasheet. Check for any specific ordering information or regional availability constraints directly from authorized distributors.

Selection Notes

Select this component for applications requiring integrated power switching and current regulation in a single package. Consider the operating voltage range and current capabilities relative to the motor load. Evaluate thermal performance based on the expected duty cycle and ambient conditions. Verify interface logic compatibility with the controlling microcontroller or PLC.

Part Context

The L6227 belongs to STMicroelectronics' L62xx series of DMOS dual full bridge drivers. This family combines isolated DMOS power transistors with CMOS and bipolar circuits on a single BCD technology chip. The series is widely used in motor control applications due to its integrated protection features and simplified external component requirements compared to discrete solutions.

Replacement Considerations

L6227Q: Similar functionality but may differ in package or qualification standards. L6207: Full bridge driver without integrated PWM current controllers. L6226: Dual full bridge driver without integrated PWM current controllers. Verify pinout and feature set compatibility before substitution.