LYT4217E

AC DC Converters, Offline Switchers Overview

The LYT4217E is an offline switcher from the LYTSwitch-4 series, designed for high-power LED lighting applications. It integrates a 725V power MOSFET and controller into a single eSIP-7C package. The device supports flyback, buck, and boost topologies with a switching frequency of 140 kHz. It operates on input voltages between 85 VAC and 132 VAC, delivering up to 50 W of output power. Key electrical parameters include a maximum duty cycle of 99.9% and a maximum supply current of 1.2 mA.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage 725V power MOSFET with control circuitry in a compact package.
• Supports multiple converter topologies including flyback, step-down (buck), and step-up (boost).
• Features internal constant current regulation suitable for direct LED driving without external optocouplers.

AC DC Converters, Offline Switchers Applications

• High-power LED lighting drivers
• Offline AC-DC conversion systems
• Industrial LED illumination

AC DC Converters, Offline Switchers Procurement Notes

Verify component authenticity through authorized distributors due to obsolete lifecycle status. Confirm RoHS compliance details via official datasheets. Check humidity sensitivity handling requirements during storage and assembly. Validate pinout compatibility with existing PCB footprints before integration.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring integrated high-voltage switching and LED current regulation. Ensure thermal management aligns with the 150°C maximum junction temperature rating. Verify that the required output power does not exceed the 50 W limit. Consider the eSIP-7C package constraints for board layout and heat dissipation strategies.

AC DC Converters, Offline Switchers Part Context

Part of the LYTSwitch-4 family, which combines power switching and control functions. This series targets simplified design processes by eliminating the need for optocouplers and secondary-side feedback loops. The LYT4217E specifically addresses higher power demands within this architecture.

AC DC Converters, Offline Switchers Replacement Considerations

Check Power Integrations documentation for updated LYTSwitch-4 variants. Verify pin-to-pin compatibility if substituting with other eSIP-7C devices. Confirm electrical specifications match application requirements for voltage and current ratings.