Power Integrations: reference design to maximize efficiency of high-voltage LEDs

Power Integrations has published a reference design, DER-297, describing a high-efficiency, ultra-compact driver for a B10-style LED light bulb. Based on Power Integrations’ LinkSwitch-PL non-isolated, single-stage LED driver IC, the power supply is specifically tailored for use with high-voltage LEDs such as the recently announced XLamp XM-L and XLamp XT-E ranges from Cree. DER-297 provides the high-voltage output required by the LEDs, optimizing overall system efficiency by reducing power lost due to current flow in the driver inductor and output diode.

The DER-297 power supply design is very small and cost-effective with a BOM of only 20 components. The high level of integration in the LinkSwitch-PL device combines PFC and constant-current functions into a single buck-boost stage requiring only a tiny inductor. The design reaches 87% efficiency at 115 VAC for a 4.3 W LED driver (86% for 2.9 W output) while achieving a power factor greater than 0.9, easily meeting EN61000-3-2 Class C limits, and creating less than 20% Total Harmonic Distortion.


 
 

VIRTUAL EVENTS



Avionics Virtual Seminar
The Avionics industry continues to invest into new technologies not only to save costs, but also to increase capacity and to improve traffic flow and safety in the sky. This Virtual Seminar provides you with 6 technical webinars about developing high-rel, safe and secure software and hardware for Avionics systems.

Leveraging continuous real-time automation data as a business asset
Learn how Equipment Manufacturers and plant managers can break through the real-time wall between IT business systems and operational plant control systems to gain a competitive edge in manufacturing or production.

Lighting solutions
This virtual event about Lighting introduces advantages of low- and mid-power LEDs, demonstrates how technological problems of mixed LED systems can be solved by sensors with feedback control, describes how to realize a complex lighting solution with modern MCUs and introduces a light laboratory.

How to accelerate your design and reduce risk with COTS components
This webinar will give an overview of Freescale's QorIQ platforms, a highly integrated architecture including multiple cores, accelerators, security and more, along with TQ's modular COTS solutions for this advanced multicore architecture.

Microcontrollers & Tools
Traditionally Spring is high season for new product announcements in the market for microcontrollers and development tools. Therefore this free virtual conference provides you with webinars and videos about major new products and technologies which have been introduced just recently.


ARM® core-based solutions from Texas Instruments
 In this Virtual Conference TI provides overview and outlook about its ARM-based Microprocessors, Microcontrollers and SoCs product range.

Smart Metering Virtual Seminar
Smart Meters save energy and improve efficiency. The market for smart meters is projected to grow rapidly in the next couple of years. Our Virtual Seminar about Smart Metering provides you 4 free webinars presented by Silica, Texas Instruments, NXP and TÜV Süd.

Industrial Computing & Communications
The 2012 version of our Virtual Conference Industrial Computing & Communications provides an update about latest trends, solutions and products to create reliable communications within industrial environments. Major topics are Chips & Solutions for Industrial Ethernet and Boards, Modules & Systems for Industrial Applications.

Embedded Wireless
Wireless technologies are expected to be implemented in more and more applications - from personal and medical devices, to transportation and industrial and many more. This free Virtual Conference has its focus on products, technologies, and applications in the Embedded Wireless arena.