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AC step driver eases LED lighting designs

Posted: 30 Oct 2014     Print Version  Bookmark and Share

Keywords:Exar  LED lighting  step driver 

Exar Corp. has introduced what it says is an improved alternating current (AC) step driver for LED lighting applications. Combined with other iML offerings, the iML8684 promises to deliver a complete solution for LED light bulb and LED tube applications, noted the company.

Unlike conventional AC driver solutions that use a single large driver, iML has patented a novel distributed architecture of multiple small, low cost drivers. The solution provides increased flexibility and a lower overall BOM cost as it uses much lower voltage technologies. The solution also improves heat dissipation as multiple devices are used across the PCB, evenly distributing the thermal load, Exar stated. IML devices remove the need for electrolytic capacitors and inductors that are mandatory for AC-DC driver solutions while delivering lower BOM costs.

The iML8684 offers improved circuit stability in sub 3VAC situations created by TRIAC dimming, resulting in superior light quality at low dimming. The improvement also increases the number of compatible dimmers in both 120VAC and 230VAC countries.

The iML8684 device is available in DFN2x2-6L and SOT-89-5L packages. Pricing starts at $0.18 in 10,000 unit quantities.

- Paul Buckley
  EE Times Europe

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