SSL LED driver solves transformer compatibility issues

5th February 2015
Posted By : Siobhan O'Gorman
SSL LED driver solves transformer compatibility issues

An MR16 SSL LED driver, designed to solve transformer and dimmer compatibility issues in challenging, low-voltage lighting applications, has been released by Dialog Semiconductor. To optimise low-voltage SSL bulbs for compatibility with almost any transformer (electronic or magnetic), the iW3662 utilises the company’s patent-pending digital control technology.

Dialog’s technology uses advanced digital analytics to detect installed electronic transformers and dynamically increases the peak loading to latch it. This technology is also used to provide improved dimmer compatibility (TRIAC and digital dimmers) and dimmer performance, with either electronic or magnetic transformers. Flicker and shimmer-free dimming down to 5% of measured light is delivered by the technology.

The iW3662, which is designed for low-voltage AC and DC inputs, offers either single-stage or two-stage operation. This allows designers to specify one part across multiple low-voltage LED replacement bulb applications, as well as high-voltage COB LED modules up to 8W, simplifying design and reducing development time.

By enabling the use of low-cost, off-the-shelf inductors, the advanced control circuitry in the iW3662 allows designers to reduce their BOM. The use of smaller, less-expensive external components is supported by the high-frequency 1MHz switching.

To address LED bulb lifetime issues caused by excessive heat, the iW3662 integrates Dialog’s patented over-temperature protection de-rating technology. This monitors the temperature inside the sealed SSL bulb and seamlessly dims light output if the temperature rises above a safe operating threshold, then restores brightness as temperature falls.

“Dialog is a leader in digital control technology for SSL lighting, with LED driver solutions for applications ranging from small form-factor retrofit bulbs to commercial lighting ballasts,” said Davin Lee, Senior Vice President and General Manager, Power Conversion Business Group, Dialog Semiconductor. “The one remaining portion of the market we had not addressed was the low-voltage, dimmable MR16 segment, where our customers experience transformer and dimmer compatibility issues with existing LED driver solutions. Our innovative iW3662 builds on our digital control expertise with intellectual property developed specifically for the low-voltage SSL lighting market.”

“As a global leader in high quality, energy-saving green lighting solutions, Sengled is dedicated to bringing the most innovative SSL products to the market,” commented Johnson Shen, Founder and President, Sengled Lighting. “The challenge with low-voltage, dimmable MR16 lighting is compatibility with the existing infrastructure of transformers and dimmers. Dialog’s iW3662 LED driver enabled us to easily, elegantly and cost effectively solve these issues and enabled us to deliver the highest quality dimmable MR16 LED bulbs that allow consumers to seamlessly replace halogen bulbs today.”

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