LYT1603D-TL

LED Driver IC Overview

The LYT1603D-TL is a single-stage LED driver IC from the LYTSwitch-1 family, designed for non-isolated buck topologies. It integrates a high-voltage switched current source and operates with an input voltage range of 90 VAC to 308 VAC. The device provides a constant output current of 139 mA at a switching frequency of 20 kHz. It supports power factor correction (PFC) and functions within an operating temperature range of -40°C to +125°C. The component is housed in an SOIC-8 package.

LED Driver IC Feature Summary

• Integrates a high-voltage switched current source for simplified design
• Provides constant current regulation with power factor correction
• Eliminates the need for optocouplers and secondary-side control circuitry

LED Driver IC Applications

• LED lighting bulbs
• LED tubes
• Ballasts

LED Driver IC Procurement Notes

Verify the specific suffix 'TL' indicates tape-and-reel packaging when sourcing. Confirm that the base part number LYT1603D has been superseded by the reel version. Ensure compatibility with the required output current and input voltage specifications for the target application before procurement.

LED Driver IC Selection Notes

Select this component for non-isolated applications requiring integrated PFC and constant current drive. It is suitable for designs where eliminating secondary-side components reduces complexity. Verify that the 139 mA output current aligns with the LED string requirements and that the SOIC-8 package fits the thermal constraints.

LED Driver IC Part Context

This part belongs to the LYTSwitch-1 series, which focuses on reducing bill-of-materials count for low-power LED drivers. The series targets compact form factors by integrating primary-side regulation and high-voltage startup circuitry into a single chip solution.

LED Driver IC Replacement Considerations

The standard tube version LYT1603D is discontinued and replaced by the reel-packaged LYT1603D-TL. Other members of the LYTSwitch-1 family may offer different current ratings but share similar integration features.