L9903TR

Overview

The L9903TR is an automotive-grade control circuit for power MOS bridge drivers featuring an ISO 9141 bus interface. It operates with a supply voltage range of 8V to 20V, supporting up to 40V overvoltage. The device includes a charge pump for reverse battery protection and allows operation at 6V. Key electrical parameters include a quiescent current in standby mode of less than 50μA and a PWM operation frequency up to 30kHz. It provides real-time diagnostics for overvoltage, undervoltage, short circuit, and thermal conditions.

Feature Summary

• Integrated ISO 9141 bus interface for automotive communication compatibility
• Programmable cross-conduction protection time to prevent bridge faults
• Real-time diagnostic capabilities for fault detection and reporting
• Built-in charge pump enabling reverse battery protection functionality

Applications

• Control circuit for power MOS bridge drivers in automotive applications
• ISO 9141 bus interface implementation for vehicle systems

Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging configuration against the manufacturer's official ordering guide. Confirm that the component meets AEC-Q100 automotive qualification requirements if required for the target application environment. Ensure the input voltage range aligns with the system's operational specifications to avoid damage from overvoltage or undervoltage conditions.

Selection Notes

Select this component when an integrated solution for driving power MOS bridges with ISO 9141 compatibility is required. Consider its low standby current consumption for battery-sensitive automotive environments. Evaluate the need for programmable cross-conduction protection and real-time diagnostics to ensure system reliability and fault management in motor control applications.

Part Context

The L9903 belongs to STMicroelectronics' portfolio of specialized automotive driver ICs designed for robust performance in harsh environments. It complements other actuator and load driver solutions by providing dedicated bridge control with standardized automotive communication interfaces, facilitating integration into complex vehicle electronic architectures.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official replacement guide for verified alternatives.