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LED Driver

Photonics Spectra
Feb 2011
National SemiconductorRequest Info
 
Integrating active power factor correction and phase-dimming decoding across a wide programmable range to provide flicker-free uniform dimming, National Semiconductor Corp.’ LM3450 LED driver is suitable for use in high-brightness LED applications. A member of the company’s PowerWise energy-efficient product family, it is well-suited for high-performance, phase-dimmable 10- to 100-W LED fixtures. The device integrates hold circuitry to dynamically adjust the current through the phase dimmer; coupled with a programmable, intelligent dimming decoder, this ensures smooth, consistent illumination across the full dimming range. The active power factor correction ensures a high power factor that complies with residential and commercial Energy Star standards.


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GLOSSARY
triac
A semiconductor device that functions as an electrically controlled switch for AC loads.
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