Sunday, October 02, 2016
Rambus - IP Provider - Semiconductors
"Beginning with edge-lit back lighting, Rambus has pioneered light guide-based design solutions for a broad range of LED lighting applications, enabling a new level of styling, efficiency and control of light."
LED lighting technology
Rambus' lighting solutions enable manufacturers to use fewer or lower-cost LEDs in their general lighting products while delivering superior light quality and output.
Sunday, May 01, 2016
TPS61042 30-V, 500-mA Switch Boost Converter in QFN-8 for White LED Applications
LED-driver application that drives four LEDs with 20 mA of forward current and operates from an input voltage range of 1.8 to 6.0 V.
The entire circuit consists of the control IC, two small ceramic caps, an inductor, a diode, and a current sense resistor. The primary power-supply functions and the secondary features such as load disconnect, overvoltage protection, and PWM dimming have been implemented with a control IC and five small surface-mount passive components.
LED-driver considerations By Michael Day
Thursday, August 08, 2013
LED Lighting at Wikipedia
On September 24, 2009 the DOE announced that Philips Lighting North America was the first to submit lamps in the category to replace the standard 60 W A-19 "Edison screw fixture" light bulb, with a design based on their earlier "EnduraLED" consumer product.
On August 3, 2011, DOE awarded the prize in the 60 W replacement category to Philips bulb after 18 months of extensive testing. The 10-W, 900-lumen Philips bulb was made available to consumers in April 2012.
The same day, CREE demonstrated a prototype lamp producing 1330 lumens with a mere 8.7 W of input power. While the CREE lamp has not undergone DOE reliability testing and no commercial release date was promised, it is an indication that the "21st Century Lamp" performance levels may soon be within reach of commercial products.
Highly efficient LED Bulb Driver - Infineon
The highly efficient dimmable LED driver system utilizing ICL8001G sets a new Benchmark with respect to integration, performance, features and total system cost. ICL8001G employs quasi-resonant operation modes with integrated power factor control for off-line residential LED lighting applications in particular 40W / 60W / 100W incandescent bulb replacements.
Infineon ICL8001G - Bulb Driver
The EVAL-LED-ICL8001G-Bulb02 demonstrates the single-stage flyback and PFC controller ICL8001G in an LED Bulb application. Its quasiresonant operation mode, primary side control, integrated PFC and phase-cut dimming control makes it the best in class system solution for dimmable LED bulbs.
Sunday, July 21, 2013
Specializes in the manufacturing and distribution of phosphors, including light-emitting diodes (LEDs), battery materials and calcium chloride.
NICHIA - Semiconductors and Materials
Products include Ultraviolet LEDs (UV-LEDs), Light Emitting Diode (InGaN LED), LASER DIODEs and Compound Semiconductor Materials. Fine Chemicals and Special Materials for electronic component manufacture.
"Nichia 219 white LED offers typical 140 lumen output at 1 W input power with 5,000 K color temperature. Using a uniformly phosphor coated chip, Nichia 219 has the industry leading source brightness and tightest optical footprint. The spatial color uniformity is also optimized with Nichia's leading phosphor technology. At 350 mA drive current, the typical forward voltage is only 3.0 V. Additionally, this package is capable of drive currents up to 1.5 A."
Light Emitting Diode - InGan LED NICHIA
Shuji Nakamura's invention of the first high brightness blue-light LED, which was based on gallium nitride lead to the LED Lighting Phenomena.
Monday, December 24, 2012
Cirrus Logic is recognized worldwide for its expertise in developing high-precision analog and mixed-signal integrated circuits (ICs) for a broad range of consumer and industrial markets. The most respected brands in the audio and industrial markets such as Bose, Harman International, IO, Onkyo, Marantz, Panasonic, Philips, Pioneer, Samsung and Sony rely on Cirrus Logic technology.
Founded in 1984 with headquarters in Austin, Texas, Cirrus Logic is fabless.
Cirrus Logic's CS161x family of LED driver ICs for TRIAC dimmer systems solves the global challenges of dimmer compatibility.
CRD1611 Reference Design Board and the CS161x Chip With LED Lamp
The CS1610/11/12/13 digital control ICs are engineered to deliver a high-efficiency, cost effective, flicker-free, phase-dimmable, solid state lighting (SSL) solution for the incandescent lamp replacement market.
Cirrus Logic, Inc.
800 West 6th Street, Austin, Texas 78701, United States
Friday, November 16, 2012
"ROHM Co. Ltd. was established in Kyoto, Japan, in 1958. ROHM designs and manufactures semiconductors, integrated circuits and other electronic components. These components find a home in the dynamic and ever-growing wireless, computer, automotive and consumer electronics markets....."
1954 - Toyo Electronics Industry established. Carbon film resistors developed and marketed.
1967 - Transistors and switching diode developed and marketed.
Company History Rohm
- Discrete Semiconductors
- Opto Electronics
- LED / LCD Drivers
- Sensor ICs
- Laser Diodes
- Contact Image Sensor
"ROHM expands its widely used lineup of high speed switching, high voltage resistance MOSFETs for PFC circuits in switching power supplies and main switch circuits with a variety of package types."
Monday, June 25, 2012
"Zetex is a leading provider of high performance, analog semiconductor products for signal processing and power management. Headquartered near Manchester in the UK..."
Update - Zetex is now part of Diodes Inc..
Diodes Incorporated is a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic, and analog semiconductor markets.
- Bipolar transistors
- General power management
- Motor control
ZXLD1350 Evaluation Board
The ZXLD1360 provides a 1A version of the same circuit topology, whereas the ZXLD1362 and ZXLD1366 are 60V options, ideally suited for linear LED arrays (comprising Cree XPE or XPG, for example) for T8 or T5 fluorescent tube retro-fit or system replacement.
Wednesday, August 03, 2011
ROHM products include DC/DC and AC/DC Converters which are ideal for Consumer LED Lighting. High Efficiency LED Drivers are also in the Product line.
“Uniform, shadow-free light (fluorescent type LEDs) A proprietary design consisting of a large number of medium-power LEDs creates uniform, shadow-free light.”
ROHM Semiconductor and Modules. System LSI, discrete components and module products, utilizing the latest in semiconductor technology.
ROHM – Electronic Components
Monday, June 06, 2011
Exar Corporation based in Fremont, CA. designs, develops and markets high-performance, analog and mixed-signal silicon solutions for a variety of markets including networking, communications, and storage.
Other Areas are
- Power solutions, power and system architecture, LED-Lighting.
- Networking, UART and serial protocol transceiver solutions, Storage.
Exar - Communications Semiconductors
Semiconductors and application software - circuit and packet services over PDH, SDH and OTN transport networks.
T/E/J, SDH/SONET and OTN product portfolio. Carrier Ethernet and OTN System-on-Chip solutions include carrier proven DeviceManager and ServiceManager applications software products.
PowerArchitect - Exar
Modify voltage, current and other parameters to create complex sequencing schemes monitor and configure supplies in real-time.
Wednesday, April 08, 2009
"Conventional TRIAC dimmers are designed to interface to a resistive load (halogen or incandescent bulb), while today's LED driver solutions interfaced to a standard wall dimmer produce 120 Hz flicker of the LED and/or do not allow 100:1 dimming....."
- Application voltage range from 80 VAC to 270 VAC
- Angle detector/decoder enables wide (100:1) full range dimming
- Scalable output current up to and greater than 1A
LM3450/50A Phase Dimmable LED Driver. Power factor controller (PFC) with separate phase dimming decoder which interprets the phase angle and remaps it to a 500Hz PWM output. A dimmable off-line LED driver for 10-100W loads can be designed with this.
- Over-voltage protection
- Feedback short circuit protection
- Analog dimming
- Low power operation