L6225DTR

Overview

The L6225DTR is a DMOS dual full-bridge motor driver from STMicroelectronics, part of the L6225 series. It utilizes MultiPower-BCD technology to integrate isolated DMOS power transistors with CMOS and bipolar circuits on a single chip. Designed for brushed DC and bipolar stepper motors, it operates within an 8V to 52V supply range. The device features four half-bridge outputs configured as two full bridges, delivering a typical peak output current of 2.8A (1.4A DC). It includes integrated fast freewheeling diodes, under-voltage lockout, cross-conduction protection, non-dissipative overcurrent protection, and thermal shutdown.

Feature Summary

• Integrates isolated DMOS power transistors with control logic using MultiPower-BCD technology
• Provides non-dissipative overcurrent protection and thermal shutdown for enhanced reliability
• Features integrated fast freewheeling diodes and under-voltage lockout mechanisms

Applications

• Brushed DC motor control systems
• Bipolar stepper motor drives
• General industrial motor applications

Procurement Notes

Verify the specific package variant against project requirements, as the L6225 family is available in PowerDIP20, PowerSO20, and SO20 configurations. Confirm that the 20-SOIC package aligns with PCB layout constraints. Ensure compatibility with the intended operating temperature range of -25°C to 125°C TJ. Cross-reference the ordering suffix with official documentation to confirm pinout and electrical characteristics match the design specifications.

Selection Notes

Select this component when designing circuits requiring dual H-bridge control for mixed motor types. The 1.4A DC rating suits moderate load applications, while the 2.8A peak supports startup currents. Consider the 0.73Ω typical RDS(on) for thermal management calculations. This device is suitable for designs needing integrated protection features without external discrete components, simplifying the bill of materials compared to discrete solutions.

Part Context

The L6225DTR belongs to the L6225 series of dual full-bridge drivers. It shares architectural similarities with the L6205 but differs in power stage sizing, offering lower continuous current capability. Both devices utilize the same MultiPower-BCD technology and protection schemes. The DTR suffix indicates a tape-and-reel packaging format, distinct from tube-packaged variants like the L6225D.

Replacement Considerations

The L6225D is a direct functional equivalent in tube packaging. For higher current requirements, the L6205 series offers increased DC and peak current ratings while maintaining similar interface and protection features.