Opto-Electronics


Driver for LED retrofit lamps

11 May 2011 Opto-Electronics

The first in a new family of mains-operated LED lamp drivers from STMicroelectronics aims to enable designers to deliver more reliable and efficient LED retrofit lamps featuring primary-side current regulation.

The new HVLED805 integrates an 800 V avalanche-rugged MOSFET, achieved using ST’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, without requiring the current-sensing components and optocoupler used in conventional secondary-side regulation. The elimination of these components decreases the cost and size of the LED driving circuitry and saves current-sensing losses, improving overall efficiency.

Using PSR, the HVLED805 guarantees LED current regulation to within 5% accuracy. Reliability is also enhanced, due to the elimination of the optocoupler on the secondary side, whose degradation can significantly decrease the mean-time-between-failure of the lamp. The PSR controller integrates high-voltage startup for efficient power-on, and the robust 800 V power MOSFET allows a reduction of the snubber network. The highly efficient quasi-resonant operating mode further boosts energy savings and reduces the EMI filtering required.





Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

PhotoMOS relays
Future Electronics Opto-Electronics
The AQY221R2SX and AQY221R2S PhotoMOS from Panasonic Industry ensures excellent characteristics and high-speed switching performance.

Read more...
Mouser now shipping onsemi’s image sensors
Opto-Electronics
The AR0145CS is a 1/4,3-inch CMOS digital image sensor with a 1280 (H) x 800 (V) active-pixel array that can capture both continuous video and single frames.

Read more...
Adaptive optics’ power solution
Altron Arrow Opto-Electronics
Vicor power-dense adaptive optical modules enable colossal telescopes to look into the past for deep space discoveries.

Read more...
Ultra-high speed photo detection
Opto-Electronics
TDK Corporation has announced a photo-spintronic conversion element combining optical, electronic, and magnetic elements that can respond at an ultra-high speed of 20 picoseconds.

Read more...
High-speed lasers
RFiber Solutions Opto-Electronics
Macom are a high-volume manufacturer of lasers, deploying more than 100 million devices with a reliability of less than 50 FIT and greater than 100 years of wear-out lifetime

Read more...
High-performance optical interconnect
Opto-Electronics
STMicroelectronics has unveiled its next generation of proprietary technologies for higher-performing optical interconnect in datacentres and AI clusters.

Read more...
Halo mid-board optical transceiver
Spectrum Concepts Opto-Electronics
The Samtec Halo mid-board transceiver has been designed for next-generation embedded applications that require 56 and 112 Gbps PAM4 performance in low profile and ruggedised form factors.

Read more...
New generation of Ethernet media converters
IOT Electronics Opto-Electronics
Phoenix Contact is introducing three new families of media converters to the market, each designed for specific industrial environments and challenges.

Read more...
PIN photodiode with integrated lens
RFiber Solutions Opto-Electronics
The MARP-BP112 from Macom is a backside-illuminated PIN photodiode, usable from 1200 nm to 1650 nm, that is optimised for use in 112 GBaud PAM4 applications.

Read more...
RGBIR sensor with I2C interface
Opto-Electronics
Available in a miniature opaque 2,67 x 2,45 mm package, Vishay’s VEML6046X00 includes high-sensitivity photodiodes, a low noise amplifier, and a 16-bit analogue to digital converter.

Read more...