FT833B12-RT

Overview

The FT833B12-RT is an offline LED driver IC from Fremont Micro Devices, packaged in an 8-SOP. It provides a constant output current of 420mA and supports flyback dimming control. The device integrates a 650V power MOSFET and utilizes primary-side regulation (PSR) for high precision. It operates as an AC/DC offline switcher designed specifically for LED lighting applications.

Feature Summary

• Integrates a 650V power MOSFET for compact design
• Utilizes primary-side regulation to eliminate secondary feedback components
• Supports flyback dimming functionality

Applications

• LED lighting systems
• Offline AC/DC conversion circuits

Procurement Notes

Verify component status carefully as the FT833B12-RT is listed as no longer manufactured by Fremont Micro Devices. Confirm availability through authorized distributors or surplus suppliers. Check for tariff implications if shipping to specific regions like the United States. Ensure compatibility with existing designs before sourcing obsolete inventory.

Selection Notes

Select this component for designs requiring integrated power switching and primary-side regulation. The 420mA output current suits specific LED string configurations. Consider the 8-SOP package constraints and the 650V MOSFET rating for voltage headroom. Verify that flyback dimming meets system requirements.

Part Context

This part belongs to the FT833 series of high-precision, primary-side regulated constant current drivers. The series targets LED illumination applications where simplified feedback loops are preferred. Fremont Micro Devices positions these chips as efficient solutions for reducing component count in power supply designs.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.