Opto-Electronics


Switch dimmable LED driver

25 January 2012 Opto-Electronics

Supertex has introduced the HV9801A, a switch dimmable LED driver IC designed to drive LEDs in dimmable household and office lighting applications. The IC dims LED lamp brightness to one of four preset levels through simple, rapid toggling of a light switch. Light levels progress up and down sequentially and if the switch is turned off for more than a second, the lamp returns to full brightness.

Switch dimming offers an attractive alternative to TRIAC dimming as it enables dimming of lamps in any location, provides a better quality light source without flicker, and increases energy efficiency through the reduction of the excess circuitry required to accommodate the holding current of the TRIAC dimmer. The HV9801A works with all existing light switches and does not require installation of a wall dimmer.

As opposed to many LED driver ICs that utilise peak current control to regulate output current, the device employs a patented average-mode current control method that requires no loop compensation or high-side sensing. This proprietary control method provides quick and accurate response to input voltage fluctuations and delivers high accuracy (over 97%) and line and load regulation of the LED current.



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

M12 panel mount connectors
Communica Interconnection
Binder, a specialist in industrial circular connectors, offers a particularly wide range of M12 panel mount connectors that cover a wide variety of connection types, materials, and fastening solutions.

Read more...
Enhanced breaker status and communication module
Schneider Electric South Africa Opto-Electronics
Schneider Electric has announced the launch of its new Breaker Status and Communication Module (BSCM) Modbus SL/ULP, which delivers enhanced performance, improved connectivity, and simplified integration for power distribution systems.

Read more...
Heat-resistant LEDs
Opto-Electronics
Würth Elektronik’s new RGB LEDs are characterised by excellent heat resistance with an insensitivity to temperatures from -40 to 100°C making them ideal solutions for reliable, colour-variable lighting in applications at high operating temperatures.

Read more...
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...









While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.




© Technews Publishing (Pty) Ltd | All Rights Reserved