FL7733MX

Overview

The FL7733MX is a primary-side-regulated LED driver IC with integrated power factor correction, designed for dimmable LED applications. It supports AC input voltages ranging from 80 V to 308 V and provides a regulated output voltage between 1.5 V and 5 V. The device operates at a switching frequency of 70 kHz and delivers an output current of up to 180 mA. It features short circuit and thermal protection mechanisms. The component is housed in an SOP-16 package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates primary-side regulation with power factor correction for efficient LED driving
• Supports phase-cut dimming compatibility for adjustable lighting control
• Includes built-in short circuit and thermal protection for system reliability

Applications

• Dimmable LED lighting systems
• AC-powered LED drivers
• General illumination applications requiring power factor correction

Procurement Notes

Verify the specific ordering suffix against onsemi's current nomenclature standards, as Fairchild part numbers may have transitioned to dash-separated formats. Confirm RoHS compliance status and moisture sensitivity classification prior to procurement. Ensure the selected variant matches the required SOP-16 package and operational temperature range for the intended application environment.

Selection Notes

Select this component for designs requiring integrated PFC and primary-side regulation in a compact form factor. Consider the 180 mA output current limit and 70 kHz operating frequency when designing the external magnetic components. Verify that the input voltage range aligns with the local mains supply specifications and that the dimming requirements are compatible with the phase-cut control interface.

Part Context

The FL7733MX belongs to the FL7734 series family of LED lighting driver ICs manufactured by onsemi. It represents a transition from Fairchild Semiconductor product lines following corporate integration, where part numbering conventions shifted from underscores to dashes. This device serves as a specialized solution for high-performance, cost-effective LED lighting applications requiring regulatory compliance and dimming capabilities.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.