L9908TR

Overview

The L9908TR is an automotive-grade gate driver unit designed for controlling six N-channel FETs in brushless DC motors. It features three independent half-bridge channels capable of withstanding voltage excursions from -14 V to 95 V on motor pins. The device supports a motor supply voltage (VDH) range of 4.5 V to 75 V, accommodating 12 V, 24 V, and 48 V systems. It includes three high-accuracy current monitor channels with SPI-configurable gain and offset, plus real-time phase voltage monitoring. Communication is handled via a 32-bit SPI slave interface operating at up to 10 MHz.

Feature Summary

• Complies with ISO26262 standards and holds AEC-Q100 qualification for ASIL-D system readiness.
• Integrates dedicated regulators, charge pumps, and bootstrap circuits for robust operation in passenger, commercial, and hybrid vehicles.
• Provides comprehensive protection including shoot-through diagnosis, dead-time insertion, and detection of battery/ground shorts or open loads.

Applications

• Brushless DC motor control in passenger vehicles
• Motor drive systems in commercial vehicles
• Electric motor management in hybrid vehicle applications

Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when sourcing. Confirm that the component meets AEC-Q100 requirements for your target automotive environment. Ensure the design supports the required voltage ranges and SPI communication protocols specified in the official datasheet.

Selection Notes

Select this component for applications requiring high-voltage tolerance and integrated safety diagnostics. It is suitable for designs needing precise current monitoring and flexible PWM duty cycle control. Consider its compatibility with 3.3 V and 5 V logic levels for microcontroller interfacing.

Part Context

The L9908 is part of STMicroelectronics' portfolio of specialized power management ICs for automotive motion control. As a gate driver unit, it simplifies the implementation of complex motor control strategies by integrating pre-drivers and diagnostic features into a single package.

Replacement Considerations

Consult official documentation for confirmed substitute part numbers. Verify pinout compatibility and electrical parameter alignment before considering alternatives.