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ON Semiconductor unveils power factor corrected LED driver
By siliconindia
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Monday, 01 March 2010, 21:19 IST
Bangalore: ON Semiconductor, a supplier of silicon solutions for green electronics launched a new power factor corrected dimmable LED driver for residential and commercial lighting applications. Housed in a compact 8-pin surface mount package, the company claims that the NCL30000 achieves high power factor (less than 0.95) in a single-stage topology by using critical conduction mode (CrM) flyback architecture, thereby eliminating the need for a DC-DC conversion stage.
Constant on-time CrM operation is particularly suited to isolated flyback LED applications, as the control scheme is straightforward and very high efficiency can be achieved - even at low power levels. This is important in LED lighting in order to support compliance with regulatory requirements and meet overall system efficacy requirements. Typical applications include LED driver power supplies, LED-based down lights, TRIAC dimmable LED-based lamps and power factor corrected constant voltage supplies. This device is compatible with both leading edge TRIAC-based and trailing edge transistor-based dimmers. Depending on the dimmer used, the LED output can be controlled down to two percent.
Three up to 15 watts reference designs are provided and are intended to drive from 4-15 LEDs at 350 mA. They can however, be easily modified to support power levels ranging from 5W to 30W. "Our customers have a need for dimmable LED driver solutions that are compatible with existing wiring and controls," said Christophe Warin, AC-DC Business Unit Manager at ON Semiconductor. The Pb, halogen and BFR free NCL30000 is RoHS compliant and is available in an eight-pin SOIC package. It is priced at $0.45 per unit in 10,000 unit quantities. Samples are available now. Projected lead-time for production quantities is currently eight to 12 weeks after receipt of order (ARO).
