News: Microelectronics
15 September 2020
Power Integrations launches GaN-powered LED driver for compact smart lighting
Power Integrations of San Jose, CA, USA, which provides high-voltage integrated circuits for energy-efficient power conversion, has announced a new member of its LYTSwitch-6 family of safety-isolated LED driver ICs for smart-lighting applications.
The LYT6078C uses the firm’s PowiGaN gallium nitride (GaN) technology to deliver efficiency and performance benefits, demonstrated by the new design’s example report (DER-920).
The PowiGaN-based LYT6078C IC incorporates a 750V power switch and delivers flicker-free output up to 90W (with other members of the family providing up to 110W). Including both the power factor correction (PFC) stage and the LYTSwitch-6 LED driver, system efficiency exceeds 90%. Housed in the miniature InSOP-24 surface-mount package, LYTSwitch-6 ICs are protected by a thermal fold-back system, which reduces output power to limit device temperature during abnormal conditions, while still providing light output. LYTSwitch-6 ICs also incorporate Power Integrations’ FluxLink communication technology, which allows secondary-side control without the need for an optocoupler, and provides better than ±3% CV and CC regulation across line, load, temperature and manufacturing. All LYTSwitch-6 ICs exhibit fast transient response and support pulse-width-modulation (PWM) dimming.
The performance benefits of the LYT6078C are evident in a new design report (DER-920) detailing a two-stage PFC boost plus isolated flyback on a dimmable LED ballast. It employs the LYTSwitch-6 LYT6078C IC and Power Integrations’ HiperPFS-4 PFS7624C PFC controller and provides peak efficiency of greater than 91% when driving a 48V LED string at 1350mA from a 220VAC to 277VAC input. In standby mode, system power consumption is less than 80mW, which provides substantial flexibility when designing lighting controls and particularly dim-to-off circuits.
“Power Integrations’ new PowiGaN-based LYTSwitch-6 ICs save lighting manufacturers space and system costs for smart-lighting power supplies,” says Hubie Notohamiprodjo, director of product marketing for LED lighting. “The company’s key design goals for our latest design report were high power factor, low harmonic content, high efficiency, and 3-in-1 dimming with zero-to-100% output current. The new LYT6078C driver IC, combined with our HiperPFS-4 PFC controller, easily met these challenges,” he adds.
PowiGaN-based LYTSwitch-6 LED-driver ICs are available now, priced at $2.52 in 10,000 quantities.
