LYT2005E

AC DC Converters, Offline Switchers Overview

The LYT2005E is a high-performance, single-stage AC-DC converter IC from the LYTSwitch-4 family by Power Integrations. Designed for off-line LED drivers, it integrates a controller, driver, and switch to achieve tight constant current regulation with better than ±5% tolerance. The device supports power factor correction (PFC) for low-line applications and offers options for TRIAC dimming or non-dimming configurations. Operating at a switching frequency of 132 kHz, it enables the use of small magnetics and eliminates the need for primary-side aluminum electrolytic bulk capacitors, thereby extending lifetime in high-temperature environments.

AC DC Converters, Offline Switchers Feature Summary

• Integrates primary-side control to eliminate optoisolators and reduce component count
• Provides combined PFC and constant current regulation in a single-stage topology
• Supports leading-edge and trailing-edge TRIAC dimming with fast start-up characteristics

AC DC Converters, Offline Switchers Applications

• Off-line LED lighting drivers
• TRIAC dimmable LED bulbs
• Non-dimmable LED fixtures

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix and date code against official Power Integrations documentation to confirm manufacturing status. Check for end-of-life notifications or obsolescence warnings prior to procurement. Ensure compatibility with required thermal and electrical specifications for the target application design.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring high power factor and low total harmonic distortion without secondary-side feedback components. Consider the 132 kHz switching frequency for magnetic size optimization. Evaluate TRIAC dimming requirements to ensure compatibility with the selected dimmer types and conduction angles.

AC DC Converters, Offline Switchers Part Context

The LYT2005E belongs to the LYTSwitch-4 family, which focuses on high-efficiency, cost-effective LED driver solutions. This family utilizes primary-side sensing to maintain regulation accuracy while minimizing external parts. The integration allows for simple single-sided PCB layouts, reducing assembly costs and improving reliability compared to traditional multi-component designs.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official cross-reference guides for direct pin-compatible alternatives within the same family. Verify that substitute devices meet identical regulatory compliance standards and thermal performance requirements for the intended enclosure.