BD9428

Overview

The BD9428 is a white LED driver IC designed for large LCD panels, functioning as a DC-DC converter type controller. It regulates PWM output current up to 250mA to drive high-brightness LEDs. The device supports wide input voltage ranges and integrates protection features such as overcurrent and thermal shutdown. It utilizes a 16-DIP package for mounting.

Feature Summary

• Integrates a DC-DC converter topology optimized for driving white LEDs in large LCD backlight applications
• Provides regulated PWM output current control with adjustable settings
• Includes built-in protection mechanisms for system reliability

Applications

• Large LCD panel backlighting systems
• White LED driver circuits
• DC-DC converter based lighting modules

Procurement Notes

Verify the specific suffix (e.g., EFV-E2) against the manufacturer's datasheet to confirm pinout and electrical specifications. Confirm availability status as some variants may be marked as NRND or EOL. Ensure the selected package matches the PCB footprint requirements before ordering.

Selection Notes

Select this component for applications requiring a dedicated single-channel LED driver with integrated power switching. Evaluate the required output current against the 250mA limit. Consider the operating temperature range and input voltage compatibility with the system power supply design.

Part Context

This part belongs to Rohm's series of LED drivers specifically engineered for display backlights. It complements other models like the BD9420F and BD9479FV within the same functional category. The family focuses on providing efficient power conversion and precise current regulation for LCD illumination.

Replacement Considerations

Check for direct substitutes within the BD94xx series such as BD9420F or BD9421F. Verify that alternative parts match the package type and current rating. Consult the latest Rohm cross-reference guide for confirmed compatible replacements.