BD81A24EFV-ME2

Overview

The BD81A24EFV-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 and four constant current drivers, each capable of delivering up to 120 mA per channel for a total maximum output of 480 mA. The device operates within an input voltage range of 4.5 V to 35 V and supports a switching frequency from 200 kHz to 2.2 MHz. It features PWM dimming with a ratio of 10,000:1 at 100 Hz and includes protection functions such as UVLO, OVP, OCP, SCP, and LED abnormality detection. The component is housed in a 28-pin HTSSOP-B package.

Feature Summary

• Integrates a buck-boost current mode DC/DC controller with four independent constant current LED drivers.
• Supports high-contrast PWM dimming control with a ratio of 10,000:1 at 100 Hz.
• Includes comprehensive protection mechanisms including overvoltage, overcurrent, short circuit, and open/short LED detection.
• Features an integrated VOUT discharge function compatible with buck-boost or buck structures.

Applications

• Automotive LCD backlight driving
• High-brightness LED illumination systems
• Vehicle display unit lighting

Procurement Notes

Verify the specific suffix ME2 against the manufacturer's datasheet to confirm pinout and packaging details. Ensure compatibility with AEC-Q100 Grade 1 requirements for automotive deployment. Check for moisture sensitivity level (MSL 3) handling instructions during assembly. Confirm that the 28-HTSSOP-B package dimensions match the target PCB footprint. Validate that the external components selected support the specified 200 kHz to 2.2 MHz switching frequency range.

Selection Notes

Select this component when designing automotive lighting circuits requiring four independent channels with high current capability. It is suitable for applications needing stable operation across wide input voltage variations due to its buck-boost topology. Consider this IC if PWM dimming with high contrast ratios is required without flicker. Ensure the design accommodates the thermal characteristics of the HTSSOP-B package under maximum load conditions.

Part Context

This part belongs to ROHM Semiconductor's BD81A series of automotive-grade LED drivers. The series is characterized by integration of DC/DC controllers and multiple current drivers in a single package. The BD81A24 variant specifically provides four channels, distinguishing it from other series members like the BD81A76 which offers six channels. These devices are engineered to meet stringent automotive reliability and functional safety support criteria.

Replacement Considerations

The BD81A24EFV-M is listed as an alias for this component. Verify electrical pin compatibility before substitution. No other direct cross-model replacements are confirmed in the provided documentation.