ALED7709BTR

Overview

The ALED7709BTR is an automotive-grade LED driver IC from STMicroelectronics, qualified to AEC-Q100 Grade 1 standards. It integrates a boost/SEPIC DC-DC controller with four low-side constant-current sinkers, designed for driving high-brightness LED strings in automotive applications. The device operates within a 4.5 V to 42 V input voltage range and supports up to 60 V load dump tolerance at 24 V battery systems. It features a 200 mA output current capability per channel and functions in either Standalone Mode (SAM) via PWMI signals or Bus Driven Mode (BDM) through an I²C interface. The package type is QFN.

Feature Summary

• Integrates a boost/SEPIC switching converter with four independent constant-current sinks for optimized efficiency.
• Supports mixed PWM and analog dimming modes to enhance brightness control range.
• Includes comprehensive protection mechanisms such as overvoltage, overcurrent, thermal shutdown, and open/short LED fault detection.
• Capable of operating in both standalone mode controlled by PWMI and bus-driven mode via I²C serial interface.

Applications

• Automotive infotainment display backlighting
• Head-up display (HUD) illumination
• Instrument cluster lighting
• Interior ambient and strip lighting

Procurement Notes

Verify the specific suffix 'BTR' corresponds to the reel packaging configuration and tape-and-reel quantity specified in the official datasheet. Confirm that the AEC-Q100 Grade 1 qualification status remains valid for the intended automotive environment. Ensure compatibility with the required operating temperature range of -40 °C to 150 °C TJ. Cross-reference the pinout and electrical characteristics with the latest manufacturer documentation before integration.

Selection Notes

Select the ALED7709BTR variant when Standalone Mode (SAM) operation via PWMI signals is preferred, as the 'B' suffix indicates suitability for this control method compared to the 'A' variant which targets Bus Driven Mode. Evaluate the need for integrated DC-DC boosting versus external solutions based on LED string voltage requirements. Consider the I²C interface availability if advanced feature access and local/global dimming control are necessary for the system architecture.

Part Context

The ALED7709x series represents STMicroelectronics' solution for automotive LED illumination, combining power management and driver functions in a single component. This integration reduces board space and simplifies design complexity for high-efficiency lighting systems. The family includes variants tailored for different control interfaces, supporting both simple standalone operations and complex networked bus-driven configurations for modern vehicle architectures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Engineers should consult STMicroelectronics directly for alternative components or updated product line information regarding automotive LED drivers.