The latest launch of the isolation LED controller

According to the eetimes.de website reported that Lingli company (LinearTechnology) has launched a dynamic power factor correction (PFC) isolated LED controller function. It is specially designed for driving LED from 90V to 265V for general purpose AC input range. The LT3799 is optimized for 4W to LED over 100W and is compatible with standard triac triac.

Current sensing scheme LT3799 good to monitor two side current without using the optical coupler case. This not only reduces the cost, but also improves the reliability. In addition, it requires only a minimum of external components of the single-stage PFC regulator. The LT3799 package features enhanced thermal resistance of the MSOP-16E, which ensures that the controller can provide a simple and compact solution for offline LED applications.

The efficiency of the supply LT3799 has 86%, eliminates the need for external radiation driven IC. If coupled with a special internal circuit, it will provide up to 0.977 active PFC. This is in line with the requirements of the Ministry of energy (DOE) industry as well as the provisions of the IEC61000-3-2 class C lighting equipment. The LT3799 can be used for standard wall mounted triac and does not produce any noticeable flicker. In addition, its LED open circuit and short circuit protection system ensures the reliability of the LED long term application.