L9935

Overview

The L9935 is a two-phase stepper motor driver circuit designed for bipolar stepper motors. It features integrated chopping current regulation and minimized power dissipation during flyback. The device includes short-circuit protection, over-temperature pre-alarm, and cross-conduction prevention. It operates with a maximum supply voltage of 24 V and standby consumption typically at 40 μA. Control is managed via a serial interface (SPI).

Feature Summary

• Integrated chopping current regulation for precise motor control.
• Built-in protections including short-circuit, over-temperature, and cross-conduction.
• Controlled output voltage slopes to reduce electromagnetic radiation.

Applications

• Bipolar stepper motor drive systems
• Industrial automation equipment
• Precision positioning mechanisms

Procurement Notes

Verify the NRND status before finalizing designs. Confirm SPI pinout compatibility with the host controller. Ensure thermal management meets requirements for continuous operation. Check package availability for long-term production needs.

Selection Notes

Select this component for applications requiring integrated protection in a compact form factor. Suitable for systems needing low standby power and SPI-based control. Evaluate thermal performance under load conditions.

Part Context

This part belongs to STMicroelectronics' stepper motor driver portfolio. It is designed to simplify system design by integrating multiple protection features and control logic into a single IC.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Consult official channels for alternative recommendations if this part is no longer recommended for new designs.

FAQ

What type of stepper motor does the L9935 support?

The L9935 is suited to drive bipolar stepper motors.

How is the L9935 controlled?

The device is controlled by a serial interface (SPI).