Power Integrations, Inc. AC DC Converters, Offline Switches LYT4211E2

The LYT4211E2 is part of the LYTSwitch-4 family of high power LED driver ICs designed for low-line applications with an input voltage range of 85-132 VAC. This product features a single-stage primary-side constant current controller with power factor correction (PFC) and is optimized for applications requiring accurate current regulation. The LYT4211E2 does not support TRIAC dimming. The device offers a minimum output power of 2.5 W and a maximum output power of 12 W, making it suitable for various LED driving applications. It achieves high efficiency, with typical designs reaching up to 92%, and maintains a power factor greater than 0.9, ensuring compliance with international standards for total harmonic distortion (THD). The switching frequency of 132 kHz allows for the use of smaller magnetics, contributing to a compact design. Additionally, the LYT4211E2 is designed for fast start-up times, achieving full brightness in less than 250 ms and 10% brightness in under 1 second. The integrated design reduces component count and costs, eliminating the need for optoisolators and primary-side aluminum electrolytic bulk capacitors, which enhances the longevity of the driver, especially in high-temperature environments.