BD81A24MUV-ME2

Overview

The BD81A24MUV-ME2 is a four-channel white LED driver IC designed for automotive applications, certified to AEC-Q100 standards. It integrates a buck-boost current mode DC/DC controller and four constant current drivers, each capable of delivering up to 120 mA. The device operates within an input voltage range of 4.5 V to 35 V and supports a maximum output voltage of 40 V. Switching frequencies are adjustable from 200 kHz to 2.2 MHz. It features PWM dimming with a ratio of 10,000:1 at 100 Hz. The component functions reliably across a temperature range of -40°C to +125°C and is housed in a VQFN-28 package.

Feature Summary

• Integrates a buck-boost DC/DC controller with four independent constant current channels for stable LED drive under varying supply voltages.
• Supports high-contrast PWM dimming control with a ratio of 10,000:1 at 100 Hz for precise brightness adjustment.
• Includes built-in protection mechanisms such as under-voltage lockout, over-voltage protection, over-current protection, and short-circuit protection.

Applications

• Automotive exterior lighting systems
• High-brightness LED backlighting modules
• Automotive interior illumination circuits

Procurement Notes

Verify the complete part number including the suffix ME2 to ensure correct packaging and automotive qualification status. Confirm that the design utilizes the specified VQFN-28SV5050 footprint and thermal pad requirements. Ensure the application circuit adheres to the recommended switching frequency range and external component values defined in the official datasheet for optimal performance and stability.

Selection Notes

Select this component when a single-chip solution is required for driving multiple high-brightness LEDs in automotive environments. It is suitable for designs needing wide input voltage tolerance and integrated power switching. Consider the thermal characteristics of the VQFN package and the need for external synchronization if operating near the upper frequency limit. Verify compatibility with system-level functional safety requirements due to its FS supportive classification.

Part Context

This device belongs to ROHM Semiconductor's automotive-grade LED driver family, specifically engineered for high-reliability applications. It complements other members like the BD81A74MUV-ME2 by offering integrated buck-boost topology rather than simple boost or buck configurations. The series targets modern vehicle lighting architectures requiring compact form factors and robust electrical protection features.

Replacement Considerations

The BD81A24MUV-M is listed as an alias for this part number. No other distinct substitute part numbers are confirmed in the provided documentation.