L6208N

Overview

The L6208N is a fully integrated DMOS stepper motor driver designed for bipolar stepper motors, manufactured using BCD technology. It operates with an supply voltage range of 8 V to 52 V and delivers a peak output current of 5.6 A (2.8 A RMS). The device features a typical on-resistance of 0.3 Ω at 25 °C and supports operating frequencies up to 100 kHz. It is housed in a PowerDIP-24 package.

Feature Summary

• Integrates dual DMOS full bridge, constant off-time PWM current controller, and phase sequence generator
• Includes non-dissipative overcurrent protection on high-side power MOSFETs
• Features thermal shutdown and undervoltage lockout for system safety
• Supports fast/slow decay mode selection and quasi-synchronous rectification

Applications

• Bipolar stepper motor control systems
• Industrial automation equipment
• Smart home appliances requiring precise motion control

Procurement Notes

Verify the specific package type matches your design requirements, as the L6208 series includes SO24 and PowerSO36 variants alongside the PowerDIP-24 configuration. Confirm RoHS compliance status with the supplier prior to ordering. Ensure that the selected component version aligns with the intended thermal management strategy given the power dissipation characteristics of the DMOS technology used in this driver.

Selection Notes

Select the L6208N when a robust, fully integrated solution for bipolar stepper motors is required without external discrete components. The device simplifies design by combining logic, control, and power stages. Consider the 5.6 A peak current capability and 52 V maximum voltage rating to ensure compatibility with the target motor specifications. The inclusion of decoding logic for full and half-step drive reduces microcontroller processing overhead.

Part Context

The L6208 belongs to STMicroelectronics' portfolio of motor drivers utilizing DMOS technology. It is part of a family that includes various package options such as SO24 and PowerSO36. The device is often paired with evaluation boards like the EVAL6208N or software expansions like X-CUBE-SPN5 for STM32-based development, facilitating rapid prototyping and integration into broader motion control applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official STMicroelectronics resources for cross-reference information or equivalent products within the same functional category.