An introduction of isolation type active PFC off-line LED controller

California, Milpitas (MILPITAS, CA) - February 7, 2011 - (Linear Technology Corporation) technology company has launched an active power factor correction (PFC) of the isolated LED controller LT3799, the device is designed for universal input range of 90VAC to 265VAC to drive the LED design. LT3799 is optimized for LED applications that require 4W to 100W+ LED power, and is compatible with standard TRIAC wall dimmer. LT3799's unique current sensing scheme delivers a well regulated current to the secondary side without the use of an optical coupler. This not only reduces costs, but also improves reliability. The device requires a single stage PFC Regulator designed for minimal external components. In addition, its thermally enhanced MSOP-16E package ensures a simple and compact solution for offline LED applications.

LT3799 provides more than 86% efficiency, which in most applications without LED driver IC with external cooling measures. Special internal circuitry provides up to 0.977 active PFC, which is very easy to meet the requirements of the U.S. Department of energy industry, but also in line with the requirements of the IEC 61000-3-2 Class C lighting equipment. The LT3799 can be used in conjunction with standard wall TRIAC dimmer without any visible flicker. For a wide variety of LED applications, open circuit and short circuit LED protection ensures long term reliability.

LT3799EMSE by thermally enhanced 16 pin MSOP package, with 1000 units of bulk purchase, each price is $2.25, a cash supply. Extended temperature version or the "I" version of the LT3799IMSE also have cash supply, 1000 purchase price of $2.59 per piece. For more information, please log in to www.linear.com.cn.

Isolated active PFC off line LED controller

Performance overview: LT3799

External components with the fewest number of isolated PFC LED drives

VIN and VOUT are restricted by external components only

Can be used with standard TRIAC dimmer

Active power factor correction

Low harmonic content

Without optical coupler

Accurate (+ 5%) regulated LED current

Open circuit and short circuit LED protection

Heat resistant enhanced 16 lead MSOP package

An introduction

(Linear Technology Corporation) technology company is a member of the S&P 500 index, in the past 30 years, the high performance analog integrated circuit has been committed to the design, the main company of global manufacturing and sales of broad categories. The product is an established world we live analog and digital electronic indispensable bridge, including the application of the field of communication, network, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear technology manufactures include power management, data conversion, signal conditioning, RF and IC, and have Module interface subsystem.