FL77904MX

Overview

The FL77904MX is a phase-cut dimmable compact LED direct AC driver manufactured by onsemi. It functions as an offline switcher designed for lighting applications requiring triac dimming capability. The device serves as a stand-alone LED driver, configurable from 20mA to 150mA with external resistors, eliminating the need for a microcontroller. It operates in an 8-SOIC package with an exposed pad and supports logic level control signals.

Feature Summary

• Supports phase-cut dimming for compatibility with standard lighting controls
• Configurable output current range without microcontroller dependency
• Compact direct AC driver architecture

Applications

• Triac-dimmable LED lighting systems
• Stand-alone LED driver configurations
• Direct AC powered lighting fixtures

Procurement Notes

Verify component status carefully as the FL77904MX is listed as discontinued. Confirm availability through authorized distributors or secondary markets if sourcing for production. Ensure the specific MX suffix matches the required package variant. Cross-reference datasheet revisions to confirm pinout and electrical characteristics remain consistent with existing designs before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring integrated phase-cut dimming functionality in a compact form factor. It is suitable for designs needing adjustable current settings between 20mA and 150mA via external resistors. Consider its discontinued status when planning long-term product lifecycles. Evaluate alternative drivers if future supply stability is a primary constraint for the target application.

Part Context

This part belongs to onsemi's portfolio of LED driver solutions, specifically targeting direct AC input applications. It integrates switching regulation and dimming control into a single IC. The device simplifies design by removing the need for complex digital control loops, relying instead on analog configuration for current setting and standard dimmer interaction.

Replacement Considerations

As the FL77904MX is discontinued, identify compatible alternatives that support phase-cut dimming and similar current ranges. Verify package compatibility and electrical specifications against original requirements. Consult onsemi documentation for recommended successor devices or functional equivalents within their current LED driver lineup.