LYT3314D

LED Driver IC Overview

The LYT3314D is a single-stage LED driver IC from the LYTSwitch-3 family, designed for high-performance AC/DC offline switching applications. It integrates a 650V power switch and supports flyback, SEPIC, buck, and boost topologies. The device operates with an input voltage range of 85VAC to 132VAC and features a switching frequency between 40kHz and 124kHz. It provides constant current output suitable for lighting applications and includes Triac dimming compatibility. The component is housed in a 16-SO B (14-lead) surface-mount package and functions within a junction temperature range of -40°C to 150°C.

LED Driver IC Feature Summary

• Integrates a high-voltage power switch and control circuitry into a single monolithic chip.
• Supports multiple converter topologies including flyback, SEPIC, buck, and boost configurations.
• Enables direct Triac dimming capability without requiring additional external components.
• Provides constant current regulation for driving LED loads efficiently.

LED Driver IC Applications

• General illumination lighting systems
• Triac-dimmable LED lamps
• Offline AC/DC power supplies for lighting

LED Driver IC Procurement Notes

Verify the specific suffix against official documentation, as packaging variations such as tube or reel formats may exist. Confirm moisture sensitivity level requirements and reflow soldering profiles prior to assembly. Ensure the selected variant matches the required pinout and thermal characteristics for the target PCB design.

LED Driver IC Selection Notes

Select this component for designs requiring integrated PFC and constant current regulation in a compact form factor. Consider the operating frequency range and supported topologies when designing the magnetic components. Verify that the input voltage range aligns with the target market's mains specifications.

LED Driver IC Part Context

This part belongs to the LYTSwitch-3 series by Power Integrations, which focuses on simplifying LED driver design through integration. The series aims to reduce bill-of-materials count and board space by combining primary-side regulation with high-voltage switching capabilities.

LED Driver IC Replacement Considerations

LYT3314D-TL is listed as a parameter-equivalent alternative. Verify package type and tape-and-reel specifications before substitution.