Power Electronics

Digital Controller Delivers Near 100 % Triac Dimmer Compatibility

Cirrus Logic Inc. introduced a digital LED controller that directly solves dimmer compatibility issues that have been a major barrier to consumer adoption of LED retrofit bulbs. Featuring Cirrus Logic's new digital TruDimT technology, the CS161X controller family has been tested to provide near 100 percent compatibility with a wide array of dimmers representing the vast majority of the installed base worldwide. The CS161X is already in high volume production with a tier-1 lighting company. Cirrus Logic expects to ship between 5-10 million LED controllers during calendar year 2012.

LED retrofit bulbs are considered by many as the heir apparent to incandescent and compact fluorescent lamps, due to their superior energy efficiency and long life. Key barriers to mass adoption have been higher cost and, like compact fluorescents, poor dimmer compatibility. None of the LED bulbs available today, which are primarily based on analog controllers, provide consumers broad compatibility with the wide variety of dimmers installed within residences, retailers and businesses. Dimmer incompatibly problems, which include bulbs that produce flickering or flashing light or the inability to turn on or off, are a leading cause for high rate of return by consumers.

The CS161X family enables industry-leading dimmer compatibility as a result of a three-year investment in TRIAC interface algorithms, LED driver topologies and system architecture, which are the foundation of TruDim technology. The CS161X's digital intelligence allows the controller to identify the type of dimmer in use and adapt its dimmer compatibility algorithm to provide smooth dimming in much the same way the consumer has come to expect from decades of using incandescent light bulbs. This smart adaptive digital signal processing technology is not possible with today's analog controllers.

Cirrus Logic Inc.
Part Number: CS161X

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