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75W single-stage driver geared for LED lighting

Posted: 17 Aug 2012 ?? ?Print Version ?Bookmark and Share

Keywords:LNK410EG? LNK420EG? converter chip? RDR-290? LED lighting?

Power Integrations has expanded its LinkSwitch-PH IC family with two new devices. According to the company, the products allow commercial lighting applications up to 75W to benefit from single-stage design, dramatically reducing BOM cost and enabling a smaller driver with very high efficiency.

LNK410EG (dimming) and LNK420EG (non-dimming) provide a constant-current output with a PF- corrected and low THD input. The capabilities of the devices are showcased in RDR-290, a reference design describing a single-output driver for high-bay lighting.

RDR-290 is 92.2 percent efficient at 230VAC for a 75W output design while easily meeting EN61000-3-2 class C limits. Power factor is above 0.95. No primary high-voltage electrolytic bulk capacitor is required, making lifetimes of 50,000 hours practical, even in challenging outdoor environments and at high ambient temperatures.

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