Tech news tagged ‘power factor’

Linear regulation gives mains module 85% efficiency

Supertex has got together with Osram Opto to make a mains-powered light engine using only linear regulation.

Linear regulation usually means dreadful efficiency, but Supertex has a neat trick where its CL8800 ‘sequential linear LED driver’: it switches series strings or LEDs in and out through the mains waveform…

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Off-line LED controllers get dimming and PFC

Two Californian chip makers have announced their first forays into dimmable power factor corrected LED drivers, writes Steve Bush. Linear Technology has produced a single-stage flyback design and iWatt – fabless producer of low stand-by phone charger chips – has plumped for a more traditional two-stage topology…

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