L9958TR

Overview

The L9958TR is a smart power driver IC from STMicroelectronics, designed for high-performance motor control applications. It integrates four half-bridge drivers capable of driving bipolar stepper motors or two brushed DC motors via dual H-bridge configurations. The device features an integrated SPI interface for digital control and parameter adjustment. It supports supply voltages ranging from 6.5V to 45V and delivers output currents up to 5A continuous with peak capabilities of 8A. Key internal protections include over-current protection with response times under 1 microsecond, thermal shutdown, and current sensing. The component is housed in a PowerSO-36 package suitable for surface mount installation.

Feature Summary

• Integrates four half-bridge drivers supporting dual H-bridge or single full-bridge motor topologies
• Features a dedicated SPI interface for digital configuration and dynamic parameter adjustment
• Includes built-in current detection and over-current protection circuits for system safety

Applications

• High-performance servo motor control systems
• Industrial automation actuators
• Automotive window and seat adjustment mechanisms

Procurement Notes

Verify the specific suffix (e.g., SB) against the datasheet to confirm voltage range compatibility, as variants exist for different supply requirements. Confirm the lifecycle status, as some listings indicate this part may be recommended against new designs. Ensure the ordering quantity aligns with manufacturer standard packaging multiples. Cross-reference the package type to ensure it matches the PCB footprint design.

Selection Notes

Select this component when a single IC solution is required to drive multiple motors with integrated logic and power stages. It is suitable for designs requiring precise digital control via SPI rather than analog inputs. Consider the thermal performance requirements, as high continuous currents necessitate adequate heat dissipation strategies on the PCB layout. Verify that the system voltage falls within the specified operating range for the specific variant selected.

Part Context

The L9958 belongs to STMicroelectronics' portfolio of intelligent power switches and motor drivers. It is often paired with microcontrollers like the STM32 series for complete motion control solutions. Evaluation boards such as the EVAL-L9958 are available to assist in hardware development and testing. The device represents a consolidated approach to motor driving by combining gate drivers, protection logic, and communication interfaces in a single package.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.