L9950TR

Power Management - Specialized Overview

The L9950TR is a microcontroller-driven multifunctional door actuator driver designed for automotive applications. It integrates six half bridges and five high-side drivers to control up to five DC motors and five grounded resistive loads. The device features an integrated standard serial peripheral interface (SPI) for operation mode control, including forward, reverse, brake, and high impedance states. Diagnostic information is accessible via SPI. Key internal components include one full bridge rated for 6A loads, two half bridges for 3A loads, two half bridges for 1.5A loads, one high-side driver for 6A loads, and four high-side drivers for 1.5A loads. It supports programmable soft-start functions and offers low standby current consumption.

Power Management - Specialized Feature Summary

• Integrated SPI interface for comprehensive control of all operation modes and diagnostic data access
• Programmable soft-start function to manage loads with higher inrush currents
• Comprehensive protection mechanisms including short circuit, over temperature, open load, and overload diagnostics for all outputs
• Current monitor output capability for specific high-side drivers

Power Management - Specialized Applications

• Automotive door lock actuators
• Automotive window lifters
• Seat adjustment systems
• Mirrors positioning actuators
• Trunk or tailgate release mechanisms

Power Management - Specialized Procurement Notes

Verify the exact part number suffix against the manufacturer's latest documentation to ensure correct packaging and variant specifications. Confirm that the PowerSO-36 package with bottom pad aligns with your PCB thermal and mechanical design requirements. Check for any recent Product Change Notifications (PCN) regarding assembly sources or material barriers. Ensure compatibility with your system's voltage range of 7V to 28V and verify that the AEC-Q100 qualification meets your automotive project standards.

Power Management - Specialized Selection Notes

Select this component when designing automotive door systems requiring integrated motor and resistive load driving capabilities. It is suitable for applications needing precise control via SPI rather than parallel GPIOs. Consider its thermal performance given the PowerSO-36 package and bottom pad requirement for heat dissipation. Evaluate if the integrated diagnostics and current monitoring features reduce the need for external sensing components in your specific door module architecture.

Power Management - Specialized Part Context

The L9950 belongs to STMicroelectronics' portfolio of specialized power management ICs for automotive body electronics. It is part of the L9950 series, which includes variants like the L9950XP. This family addresses the complexity of modern vehicle door modules by integrating multiple drive channels into a single compact solution, reducing board space and simplifying wiring harnesses compared to discrete driver solutions.

Power Management - Specialized Replacement Considerations

Consult official STMicroelectronics documentation for confirmed substitute part numbers within the L9950 series. Verify pin-to-pin compatibility and electrical parameter equivalence before considering alternatives from other manufacturers.