BD18397RUV-ME2

Overview

The BD18397RUV-ME2 is a dual-channel synchronous buck DC-DC LED driver designed for automotive applications, certified to AEC-Q100 standards. It features an integrated on-time topology that maintains a nearly constant switching frequency while enabling rapid duty cycle adjustments. The device supports an input voltage range of 5 V to 65 V and delivers up to 3.2 A total output current across two channels, with each channel capable of driving up to 1.6 A. The maximum output voltage reaches 60 V, and the switching frequency operates between 200 kHz and 2.25 MHz. It utilizes average LED current feedback for precise regulation over wide input and output ranges.

Feature Summary

• Implements average LED current regulation using a buck topology with integrated synchronous switches for enhanced efficiency and stability.
• Supports high-resolution dimming through both PWM and analog methods, offering up to 1024 discrete steps for precise light control.
• Features an SPI interface for digital configuration and monitoring, allowing flexible system integration and diagnostic capabilities.
• Complies with ISO 26262 design processes for functional safety, ensuring reliability in demanding automotive environments.

Applications

• Automotive exterior lighting systems requiring high brightness and precise current regulation
• LED headlamp modules utilizing multiple channels for adaptive beam patterns
• Front fog lamps and daytime running lights (DRL) circuits
• Interior ambient lighting systems with digital control interfaces

Procurement Notes

Verify the specific suffix ME2 against the official ROHM datasheet to confirm package type and tape/reel specifications. Ensure compatibility with your system's SPI protocol version and check thermal requirements for the HTSSOP-C-48 package under expected load conditions. Confirm AEC-Q100 grade alignment with your vehicle's functional safety targets before finalizing component selection.

Selection Notes

Select this component when designing automotive LED drivers requiring dual-channel synchronization and high-current output up to 3.2 A. It is suitable for applications needing wide input voltage tolerance and precise dimming resolution via SPI. Consider the 48-pin HTSSOP-C-48 package for thermal management needs and ensure the PCB layout supports the high-frequency switching characteristics inherent to the on-time topology.

Part Context

This part belongs to ROHM's BD1839x series of automotive-grade LED drivers, specifically engineered for complex lighting architectures. It complements single-channel variants like the BD18395EFV-ME2 by providing dual-channel capability within a compact form factor. The series emphasizes functional safety compliance and robust performance in harsh automotive electrical environments, serving as a core solution for modern vehicle lighting control units.

Replacement Considerations

Direct substitutes are not explicitly listed in public documentation. For pin-compatible alternatives, evaluate other ROHM dual-channel buck LED drivers with similar current ratings and SPI interfaces. Verify that any replacement matches the AEC-Q100 qualification level and functional safety integrity requirements of the original design.

FAQ

What is the maximum switching frequency supported by the BD18397RUV-ME2?

The device supports a maximum switching frequency of 2.25 MHz, allowing for smaller external passive components compared to lower-frequency drivers.

Does the BD18397RUV-ME2 support analog dimming?

Yes, it supports both PWM and analog dimming methods, offering up to 1024 steps for each method to achieve fine-grained light intensity control.

Is the BD18397RUV-ME2 qualified for automotive use?

Yes, it is AEC-Q100 qualified and developed in compliance with ISO 26262 design processes for functional safety in automotive applications.