Isolated LED drivers

16 July 2014 Opto-Electronics

The new LYTSwitch-2 family of isolated LED drivers from Power Integrations delivers up to 12 Watts of accurately controlled output power and reduces component count for simpler, smaller, more reliable LED lighting designs.

The ICs use primary-side control, resulting in cost-effective, single-sided printed circuit boards with low component counts. In addition, driver isolation allows the LEDs to be affixed directly to a metal heatsink, avoiding the added expense of an electrically isolating enclosure that is often required for non-isolated drivers.

Accurate constant-current (CC) output tolerance across temperature (better than ±5% at both low-line and high-line voltages) reduces the need to over-design systems in order to meet standards requirements. Efficiencies as high as 90% can be expected in typical applications.

LYTSwitch-2 protects the LED load from surges in line voltage, increasing bulb lifetime in regions where the mains voltage is subject to frequent peaks. Its constant-current and constant-voltage (CC/CV) control function maintains a constant voltage on the output of the driver during no-load operation, preventing damage to the output filter or shutting down the driver when being tested or installed with no LED string connected.

The drivers feature over-temperature, over-current and open feedback-loop protection and are simple to design in using Power Integrations’ PI Expert design software. They are packaged in small, cost-efficient SO-8 packages as well as MSOP and eSIP packages for efficient thermal transfer in higher-power applications.

For more information contact Erich Nast, Avnet Kopp, +27 (0)11 319 8600, [email protected], www.avnet.co.za

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
TRX Electronics 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
Electrocomp 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...

---