LED-driver IC offers high reliability
Power Integrations
DER-278
Power Integrations has announced DER-278, a new reference design based on it's single-stage Linkswitch-PH LED-driver IC range, which is suitable for various solid-state lighting (SSL) applications.
The new design eliminates the need for unreliable electrolytic capacitors and opto-isolators, making it suitable for high-reliability industrial, commercial and exterior SSL applications.
Suitable for designs from 5W to 55W, SSL driver ballasts based on Linkswitch-PH ICs achieve an energy efficiency greater than 90 per cent and satisfy the Energy Star requirement of >0.9 power factor.
According to Power Integrations, LED-based lighting systems have the potential for a much longer operational life than incandescent or fluorescent bulbs.
However, the classical two-stage topology of power-factor plus high-voltage DC-DC converter, which is sometimes used by manufacturers targeting consumer-grade bulb replacements, utilises a high-voltage electrolytic bulk capacitor between the stages.
The longevity of such systems is limited by the lifetime of the electrolytic capacitor, which is vulnerable to drying out and failing, particularly when situated in an enclosed space such as a ballast brick or bulb base and exposed to the heat produced by inefficient two-stage power conversion and proximal high-brightness LEDs.
Power Integrations' single-stage, primary-side-control technology, featured in Linkswitch products, eliminates both the electrolytic capacitor and the optocoupler used in traditional isolated flyback designs.
Designers using Linkswitch-PH ICs for SSL products can expect the operational life of the driver to exceed the 35,000 hours required by the Energy Star SLL v1.1 specification.
Linkswitch-PH ICs enable designers to optimise system efficiency and meet or exceed specifications such as Energy Star and EN61000-3-2.
Samples are available now in a halogen-free, ROHS-compliant eSIPe-7C package, priced between USD1.18 (GBP0.71) and USD1.71 each for 10,000-piece quantities.
Related images
Request more information
More stories
PI Expert Suite includes thermal calculations for improving heatsink performance
Power Integration’s PI Expert Suite Version 8.5 is a piece of power supply design productivity software that is compatible with the company’s HiperLCS range of high-frequency LLC converter ICs and its TOPSwitch-JX series of integrated offline switcher ICs.
Power-supply ICs designed for slim LED-backlit TVs and PC main power systems
Power Integrations has introduced HiperLCS, a range of high-voltage LLC power-supply ICs that incorporate the controller, high- and low-side drivers and both MOSFETs into a single package, making them suitable for applications such as slim LED-backlit TVs, PC main power, servers, telecoms and networking equipment, LED streetlights and laser printers.
15W LED downlight driver uses active damping for flicker-free dimming
Power Integrations 15W PAR38 LED downlight driver for high-voltage integrated circuits, the Linkswitch-PH, allows flicker-free dimming and is 85 per cent efficient.
Power Integrations offers design example report for high-efficiency 900W power supply download
Power Integrations has published DER-274, a new design example report that describes a 900W power supply with 97 per cent efficient active power factor correction (PFC), designed for use in white goods, blowers, motor control drives and computing applications.
Power Integrations releases compact 25W LED lighting ballast reference design for T8 tubes download
Power Integrations has published the DER-287 reference design for a 25W LED T8 tube ballast power supply designed to reach 91 per cent efficiency and to be used in commercial and industrial lighting.
