Isolated power factor corrected offline regulator needs no opto
October 11, 2011 // Christoph Hammerschmidt
Linear Technology announces the LT3798, an isolated flyback controller with single stage active power factor correction (PFC). A power factor of greater than 0.97% is accomplished by actively modulating the input current eliminating the need for an extra switching power stage and associated components. In addition, no opto-isolator or signal transformer is required for feedback since the output voltage is sensed from the primary-side flyback signal.
A LT3798-based design easily complies with the IEC6100-3-2 Harmonic Current Emissions specification. Efficiencies greater than 86% can be achieved with output power levels up to 100W. The device's input voltage range is dependent on the choice of external components and it can operate over a 90VAC to 277VAC range, and can easily be scaled higher or lower. Furthermore, the LT3798 can be designed into high input voltage DC applications, making it well suited for industrial, EV/EHV automotive, mining and medical applications. The LT3798 utilizes mode operation enabling the use of a smaller transformer compared to continuous conduction mode designs, further reducing the solution size.
The LT3798 is available in a thermally enhanced 16-pin MSOP package. The LT3798E version operates from -40°C to 125°C, with 1000-piece price starting at $X.XX each. The LT3798I industrial grade version operates from -40°C to 125°C, with 1,000-piece pricing starting at $X.XX each. The LT3798H industrial grade version operates from -40°C to 150°C, with 1,000-piece pricing starting at $X.XX each. All are available from stock. For more information, visit www.linear.com/product/LT3798
Endoscopic measurement method allows quieter, more reliable jet engines
December 21, 2014
A team of scientists from German aerospace research centre DLR has developed an optical measurement method that enables direct ...
Pathway to converting sunlight to electricity is indentified
How industrial IoT will drive the MEMS market indirectly
Successful with phones & drones, Parrot ponders farming
Qimonda's late legacy: 28nm FeRAM
Volvo airs cloud-based cyclist protection system
December 19, 2014
The facts are disturbing: 50 percent of all cyclists killed in Europe's traffic have collided with a car. In Germany, the ...
Sony transforms eyewear into smart augmented reality devices
Harman grabs hidden infotainment gem S1nn
Alps Electric puts cash into Qualtre
- New life for Embedded systems in the Internet of Things
- Virtualization and the Internet of Things
- RF/Microwave Instrumentation “S” Series Amplifiers
- Application Guide to RF Coaxial Connectors and Cables
InterviewCEO interview: Bosch's IoT startup is all about the system
Thorsten Mueller, CEO of Bosch Connected Devices and Solutions GmbH (Reutlingen, Germany), has been guiding the latest startup subsidiary of Robert Bosch GmbH since 2013 when he started the initiative ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Arrow Electronics is giving away ten BeMicro Max 10 FPGA evaluation boards together with an integrated USB-Blaster, each package being worth 90 Euros, for EETimes Europe's readers to win.
Designed to get you started with using an FPGA, the BeMicro Max 10 adopts Altera's non-volatile MAX 10 FPGA built on 55-nm flash process.
The MAX 10 FPGAs are claimed to revolutionize...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.