The first in a new family of mains-operated LED lamp drivers from STMicroelectronics enables designers to deliver more reliable and efficient LED retrofit lamps featuring primary-side current regulation. LED lighting, including retrofit bulbs, is expected to account for 80% of the lighting market by 2020 or sooner.
Primary-Side Regulation (PSR) cuts bill-of-materials costs for retrofit bulbs, reducing the payback time, while also simplifying design and reducing the space occupied by LED control circuitry. The new HVLED805 integrates an 800V avalanche-rugged MOSFET, achieved using the company’s high-voltage integration process. The high-voltage on-chip startup circuitry allows the device to start reliably when the AC line voltage is applied to the lamp. Primary-side regulation maintains the constant LED current that is needed to ensure consistent light output.