GaN-Powered LED Drivers Enabling Smart-Lighting Designs

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  • Power Integrations newly launched safety-isolated LED driver ICs that helps deliver efficiency and performance benefits
  • It includes a 750 V power switch, FluxLink™ communication technology and is protected by thermal fold-back system

Power Integrations has announced the inclusion of a new member of the LYTSwitch™-6 family of safety-isolated LED drivers for smart lighting applications – the LYT6078C. It uses the company’s PowiGaN™ gallium nitride (GaN) technology to deliver efficiency and performance benefits.

The PowiGaN-based LYT6078C IC incorporates a 750 V power switch and delivers flicker-free output up to 90 W with other members of the family providing up to 110 W. By including both the PFC stage and the LYTSwitch-6 LED driver, the system attains an efficiency exceeding 90 per cent.

Compact benefits

Housed in the miniature InSOP-24 surface-mount package, LYTSwitch-6 ICs are protected by an advanced 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 requiring 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 easily support pulse-width-modulation (PWM) dimming.

The benefits of the performance for LYT6078C are mentioned in a new design report (DER-920), which details a two-stage PFC boost plus isolated flyback on a dimmable LED ballast. It employs the LYTSwitch-6 LYT6078C IC and Power Integrations’ HiperPFSTM-4 PFS7624C PFC controller and provides peak efficiency of greater than 91 per cent when driving a 48 V LED string at 1350 mA from a 220 VAC to 277 VAC input. In standby mode, system power consumption is less than 80 mW, which provides engineers with substantial flexibility when designing lighting controls and particularly dim-to-off circuits.

“The new PowiGaN-based LYTSwitch-6 ICs save lighting manufacturers space and system costs for smart lighting power supplies. 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,” said Hubie Notohamiprodjo, director of product marketing for LED lighting.

PowiGaN-based LYTSwitch-6 LED-driver ICs are available now.


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