The L9950 from STMicroelectronics is a highly integrated door actuator driver designed for automotive applications. It is an advanced system-on-chip solution that provides robust and efficient control of door lock actuators, ensuring reliable operation in the demanding automotive environment.

Key Features

• Integrated H-Bridge: The L9950 includes a built-in H-bridge motor driver capable of driving DC motors in both directions, which is essential for controlling the locking and unlocking mechanisms in vehicle doors.
• Multiple Diagnostic Functions: It offers extensive diagnostic capabilities to detect and report various fault conditions such as open-load, short-circuit, over-temperature, and under-voltage situations, enhancing system reliability and safety.
• Programmable Current Control: The device supports programmable peak and hold current control, allowing for optimized motor performance and reduced power dissipation.
• Voltage Operation Range: The L9950 is designed to operate over a wide supply voltage range, accommodating the fluctuations typical in automotive power supplies.
• SPI Interface: An SPI interface facilitates communication with a microcontroller, enabling control and diagnostics data exchange, which simplifies system integration and enhances functionality.
• Power Saving Modes: The device incorporates power-saving modes, including a standby mode, to minimize power consumption when the actuator is not in active use.

Applications

The STMicroelectronics L9950 is primarily used in automotive applications for controlling power door locks. It can also be adapted for use in other vehicle actuator control applications such as trunk release and fuel flap control, providing a versatile solution for automotive system designers.

Benefits

The integration of the L9950 in automotive systems offers manufacturers numerous benefits, including reduced system complexity, lower overall system costs, and improved reliability. Its diagnostic features and robust design ensure that the L9950 can withstand the harsh conditions of the automotive environment while providing consistent, dependable performance.