BD81A24MUF-ME2

Overview

The BD81A24MUF-ME2 is a four-channel white LED driver IC designed for automotive applications, qualified under AEC-Q100 Grade 1 standards. It integrates a buck-boost current mode DC/DC controller with built-in switching FETs to ensure stable operation despite power supply fluctuations. The device provides up to 120 mA per channel, supporting a maximum total output current of 480 mA. It operates within an input voltage range of 4.5 V to 35 V and supports adjustable output voltages up to 40 V. The switching frequency is externally programmable from 200 kHz to 2.2 MHz. It features 10,000:1 PWM dimming at 100 Hz and includes protection functions such as UVLO, OVP, OCP, and SCP.

Feature Summary

• Integrates a buck-boost current mode DC/DC controller with built-in switching FETs for stable LED drive across varying input voltages.
• Provides four independent constant-current channels capable of driving high-brightness LEDs with integrated protection mechanisms.
• Supports wide-range PWM dimming control with a ratio of 10,000:1 at 100 Hz for precise brightness adjustment.

Applications

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

Procurement Notes

Verify the specific suffix ME2 against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure the component meets AEC-Q100 Grade 1 requirements for your target automotive application. Cross-reference the part number with authorized distributors to avoid counterfeit components. Confirm that the Buck-Boost topology aligns with your system's input voltage constraints and LED string configuration prior to procurement.

Selection Notes

Select this component when designing automotive lighting systems requiring a single-chip solution for multiple LED channels. It is suitable for applications where input voltage fluctuates significantly, necessitating a buck-boost topology to maintain constant current. Consider the 120 mA per channel limit and the 40 V maximum output voltage when determining the number of series-connected LEDs. The external synchronization feature allows for noise management in complex electronic environments.

Part Context

This device belongs to ROHM Semiconductor's family of automotive-grade LED drivers. It is specifically engineered for functional safety support in vehicle electronics. The BD81A24MUF-ME2 utilizes a VQFN-28FV5050 package, offering a compact footprint suitable for space-constrained automotive PCB layouts. It replaces older discrete solutions by integrating power switches and control logic into a single IC.

Replacement Considerations

BD81A24MUV-ME2