LYT3315D

LED Driver IC Overview

The LYT3315D-TL is a single-stage LED driver IC from the LYTSwitch-3 family, designed for high-performance lighting applications. It integrates a 650V power switch and supports PFC with constant current output. The device operates in flyback, SEPIC, buck, or boost topologies and features triac dimming compatibility. Packaged in a 16-SO B-14 surface-mount format, it delivers up to 8.8W of output power. Key electrical parameters include an input voltage range of 85VAC to 132VAC, switching frequencies between 40kHz and 124kHz, and a junction temperature range of -40°C to 150°C.

LED Driver IC Feature Summary

• Integrates a 650V power switch for compact single-stage design
• Supports multiple topologies including flyback, SEPIC, buck, and boost
• Enables triac dimming functionality for lighting control
• Provides internal protection against overcurrent and thermal overload

LED Driver IC Applications

• LED lighting drivers
• General illumination systems
• Triac-dimmable light fixtures

LED Driver IC Procurement Notes

Verify the specific suffix (e.g., -TL) required for your manufacturing process, as packaging formats vary. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Ensure the ordering quantity aligns with factory minimum order requirements. Cross-reference the manufacturer part number with distributor listings to confirm current availability and lead times. Validate that the selected package matches your PCB footprint specifications.

LED Driver IC Selection Notes

Select this component for applications requiring integrated PFC and constant current regulation in a single stage. Consider the 650V rating for appropriate line voltage ranges. Evaluate the triac dimming capability if flicker-free dimming is required. Compare the 8.8W power limit against load requirements. Assess the SO-16B-14 package constraints for thermal management and board space.

LED Driver IC Part Context

The LYT3315D belongs to the LYTSwitch-3 series by Power Integrations, which combines primary-side regulation with power switching. This series targets cost-sensitive LED applications by eliminating secondary side components. The D variant typically denotes a specific package or tape-and-reel configuration within the product line, distinct from bulk or tube options found in other SKUs.

LED Driver IC Replacement Considerations

LYT3314D-TL and LYT3316D-TL are listed as parameter-equivalent alternatives. Verify pinout compatibility and electrical specifications before substitution. Ensure the replacement part meets the same topology and dimming requirements.