Parallel LEDs evaluation
... currents”…….i.e. the fact that the LEDs that you will have to use will be significantly more expensive, and since the LEDs are typically amongst the most expensive (component) items in a LED product, such extra expense is not welcome. Such “Vf binned “ LEDs are actually not perfectly Vf matched. The ...
... currents”…….i.e. the fact that the LEDs that you will have to use will be significantly more expensive, and since the LEDs are typically amongst the most expensive (component) items in a LED product, such extra expense is not welcome. Such “Vf binned “ LEDs are actually not perfectly Vf matched. The ...
BDTIC www.BDTIC.com/infineon Power Management and Multimarket
... average currents up to 1.5 A. The ILD6150 is suitable for LED applications with a wide range of supply voltages from 4.5 V to 60 V. A multifunctional PWM input signal allows dimming of the LEDs with an analog DC voltage or an external PWM signal. To minimize colorshifts of the LEDs an analog PWM vol ...
... average currents up to 1.5 A. The ILD6150 is suitable for LED applications with a wide range of supply voltages from 4.5 V to 60 V. A multifunctional PWM input signal allows dimming of the LEDs with an analog DC voltage or an external PWM signal. To minimize colorshifts of the LEDs an analog PWM vol ...
ILD6150 - 60 V / 1.5 A High Efficiency Step
... The ILD6150 is a hysteretic buck LED driver IC for driving high power LEDs in general lighting applications with average currents up to 1.5 A. The ILD6150 is suitable for LED applications with a wide range of supply voltages from 4.5 V to 60 V. A multifunctional PWM input signal allows dimming of th ...
... The ILD6150 is a hysteretic buck LED driver IC for driving high power LEDs in general lighting applications with average currents up to 1.5 A. The ILD6150 is suitable for LED applications with a wide range of supply voltages from 4.5 V to 60 V. A multifunctional PWM input signal allows dimming of th ...
Impact of Dimming White LEDs
... There are two general methods to generate white light with LEDs. The first is by the use of phosphors together with a short-wavelength LED, resulting in a broadband radiation spectrum, referred to as a phosphor-converted white LED, or PC white LED [2-5]. The second method is to utilize mixed light f ...
... There are two general methods to generate white light with LEDs. The first is by the use of phosphors together with a short-wavelength LED, resulting in a broadband radiation spectrum, referred to as a phosphor-converted white LED, or PC white LED [2-5]. The second method is to utilize mixed light f ...
TLN-904 User Guide - The Tellun Corporation
... (which can supply 100 mA). It all depends on how much current you try to draw from the regulator and whether or not you even use the internal regulator. I recommend going with the TO-220, it doesn’t cost much more than a TO-92. A similar argument applies to R6. The board layout is sized for a ½ watt ...
... (which can supply 100 mA). It all depends on how much current you try to draw from the regulator and whether or not you even use the internal regulator. I recommend going with the TO-220, it doesn’t cost much more than a TO-92. A similar argument applies to R6. The board layout is sized for a ½ watt ...
Light-emitting diode From Wikipedia, the free encyclopedia
... The first commercial LEDs were commonly used as replacements for incandescent indicators, and in sevensegment displays,[13] first in expensive equipment such as laboratory and electronics test equipment, then later in such appliances as TVs, radios, telephones, calculators, and even watches (see lis ...
... The first commercial LEDs were commonly used as replacements for incandescent indicators, and in sevensegment displays,[13] first in expensive equipment such as laboratory and electronics test equipment, then later in such appliances as TVs, radios, telephones, calculators, and even watches (see lis ...
Influence of Green, Red and Blue Light Emitting Diodes on
... demonstrate that blue LEDs with high light intensity superimpose over red and green LEDs. Plants grown under blue LEDs successfully induced maximum ΨW (water potential) to −2.33 MPa and fell to a minimum value of −0.233 MPa in leaves of plants grown at green LEDs (Figure 1E). Exposure to green LEDs ...
... demonstrate that blue LEDs with high light intensity superimpose over red and green LEDs. Plants grown under blue LEDs successfully induced maximum ΨW (water potential) to −2.33 MPa and fell to a minimum value of −0.233 MPa in leaves of plants grown at green LEDs (Figure 1E). Exposure to green LEDs ...
BDTIC www.BDTIC.com/infineon Industrial and Multimarket
... The ILD4001 is widely suitable for LED applications with supply voltages up to 42 V. A multifunctional enable pin allows dimming of the LEDs with DC voltage or a PWM signal. Furthermore the enable pin can be used to switch the LED controller on and off to minimize power consumption in standby. The I ...
... The ILD4001 is widely suitable for LED applications with supply voltages up to 42 V. A multifunctional enable pin allows dimming of the LEDs with DC voltage or a PWM signal. Furthermore the enable pin can be used to switch the LED controller on and off to minimize power consumption in standby. The I ...
BDTIC www.BDTIC.com/infineon Power Management and Multimarket
... average currents up to 0.7 A. The ILD6070 is suitable for LED applications with a wide range of supply voltages from 4.5 V to 60 V. A multifunctional PWM input signal allows dimming of the LEDs with an analog DC voltage or an external PWM signal. To minimize colorshifts of the LEDs an analog PWM vol ...
... average currents up to 0.7 A. The ILD6070 is suitable for LED applications with a wide range of supply voltages from 4.5 V to 60 V. A multifunctional PWM input signal allows dimming of the LEDs with an analog DC voltage or an external PWM signal. To minimize colorshifts of the LEDs an analog PWM vol ...
Light-emitting diode
... were developed by Isamu Akasaki and H. Amano in Nagoya. In 1995, Alberto Barbieri at the Cardiff University Laboratory (GB) investigated the efficiency and reliability of highbrightness LEDs and demonstrated a very impressive result by using a transparent contact made of indium tin oxide (ITO) on (A ...
... were developed by Isamu Akasaki and H. Amano in Nagoya. In 1995, Alberto Barbieri at the Cardiff University Laboratory (GB) investigated the efficiency and reliability of highbrightness LEDs and demonstrated a very impressive result by using a transparent contact made of indium tin oxide (ITO) on (A ...
Control Individual LEDs in Matrix Headlights with Integrated 8
... bandwidth and little or no output capacitor. This step-down topology requires that 9V–16V automotive input is “preboosted” to a 30V rail from which the step-down regulators can operate. The triple output LT3797 LED controller conveniently serves as a single-IC solution for both the “pre-boost” and s ...
... bandwidth and little or no output capacitor. This step-down topology requires that 9V–16V automotive input is “preboosted” to a 30V rail from which the step-down regulators can operate. The triple output LT3797 LED controller conveniently serves as a single-IC solution for both the “pre-boost” and s ...
The Phantastic Photon and LEDs
... Mobile electrons on the p-side of the junction occupy energy levels that lie an amount E above empty energy states there. When a large enough external voltage difference V is applied to the junction with the proper polarity, mobile electrons from the n-side can be driven up the energy hill and acros ...
... Mobile electrons on the p-side of the junction occupy energy levels that lie an amount E above empty energy states there. When a large enough external voltage difference V is applied to the junction with the proper polarity, mobile electrons from the n-side can be driven up the energy hill and acros ...
4.3-1.1-10 Applications
... electrons and holes—flow into the junction from electrodes with different voltages. When an electron meets a hole, it falls into a lower energy level, and releases energy in the form of a photon. The wavelength of the light emitted, and therefore its color, depends on the band gap energy of the mate ...
... electrons and holes—flow into the junction from electrodes with different voltages. When an electron meets a hole, it falls into a lower energy level, and releases energy in the form of a photon. The wavelength of the light emitted, and therefore its color, depends on the band gap energy of the mate ...
Abraxus Lighting
... We partner with design companies and end-users throughout Europe and far beyond to deliver world-class displays in numerous and diverse market applications. Our decorations are used inside and outside shopping malls and stores; towns and cities; theme parks, leisure and garden centres; hotels, airpo ...
... We partner with design companies and end-users throughout Europe and far beyond to deliver world-class displays in numerous and diverse market applications. Our decorations are used inside and outside shopping malls and stores; towns and cities; theme parks, leisure and garden centres; hotels, airpo ...
SnapLED / SuperFlux LED
... describe the categories used for each part. Lumileds has found that this provides a higher value to our customers than enlarging our categories so that every box, shipment, or series of shipments includes only one category. Lumileds ships SuperFlux LEDs in 1,200 piece-matched bundles, but Lumileds d ...
... describe the categories used for each part. Lumileds has found that this provides a higher value to our customers than enlarging our categories so that every box, shipment, or series of shipments includes only one category. Lumileds ships SuperFlux LEDs in 1,200 piece-matched bundles, but Lumileds d ...
Evaluates: MAX16823 MAX16823 Evaluation Kit General Description Features
... LEDs. The MAX16823 EV kit operates over the inputvoltage range of 6.5V to 16V and requires a 1A power supply. The MAX16823 IC can operate from 5.5V to 40V. Refer to the MAX16823 data sheet for proper configuration. The MAX16823 EV kit outputs are current controlled by monitoring the voltage across t ...
... LEDs. The MAX16823 EV kit operates over the inputvoltage range of 6.5V to 16V and requires a 1A power supply. The MAX16823 IC can operate from 5.5V to 40V. Refer to the MAX16823 data sheet for proper configuration. The MAX16823 EV kit outputs are current controlled by monitoring the voltage across t ...
Transparent and translucent casting resins for LED
... The potting of transparent or translucent casting resins for encapsulation of LEDs serves to protect these sensitive lighting elements against mechanical damage, moisture and other environmental influences. The specific requirements of the part determine the selection of the suitable potting system. ...
... The potting of transparent or translucent casting resins for encapsulation of LEDs serves to protect these sensitive lighting elements against mechanical damage, moisture and other environmental influences. The specific requirements of the part determine the selection of the suitable potting system. ...
LED - Why Such Interest?
... With the first generation of thin-film LED… …in 2001 OSRAM pioneered thin-film technology. This technology – which makes almost all the light generated in the chip available for use – has given rise to such innovative products as OSTAR® Projection. The new high-flux LED from OSRAM are powerful enoug ...
... With the first generation of thin-film LED… …in 2001 OSRAM pioneered thin-film technology. This technology – which makes almost all the light generated in the chip available for use – has given rise to such innovative products as OSTAR® Projection. The new high-flux LED from OSRAM are powerful enoug ...
C:\Users\roland\Documents\WTT2013\WTT-LED
... Damaged LEDs will show some unusual characteristics such as the leak current remarkably increases, the forward voltage becomes lower, or the LEDs do not light at the low current. Criteria: (VF>2.0V at IF=0.5mA) (4) Heat Generation a. Thermal design of the end product was most importance. Please cons ...
... Damaged LEDs will show some unusual characteristics such as the leak current remarkably increases, the forward voltage becomes lower, or the LEDs do not light at the low current. Criteria: (VF>2.0V at IF=0.5mA) (4) Heat Generation a. Thermal design of the end product was most importance. Please cons ...
NSSM032AT
... ● In designing a circuit, the current through each LED die must not exceed the Absolute Maximum Rating current specified for each die. It is recommended that each LED die is driven at a constant current. ● When having the two or more dice within this product on at the same time, the total power diss ...
... ● In designing a circuit, the current through each LED die must not exceed the Absolute Maximum Rating current specified for each die. It is recommended that each LED die is driven at a constant current. ● When having the two or more dice within this product on at the same time, the total power diss ...
experimental characterization regarding two types of
... Estimations are that energy consumption for producing artificial lighting could be reduced up to 50% [1] using them to substitute filament or gas discharge-based lamps. Technological advances allowed LEDs to reach a luminous efficiency1 of 150 lm/W [2], high color rendering index (CRI) and long life ...
... Estimations are that energy consumption for producing artificial lighting could be reduced up to 50% [1] using them to substitute filament or gas discharge-based lamps. Technological advances allowed LEDs to reach a luminous efficiency1 of 150 lm/W [2], high color rendering index (CRI) and long life ...
LED: Light Emitting Diodes FACTS GUIDE
... It’s important to note that lumens are measured at the source. However in directional bulbs, what matters is the amount of light that is landing on the surface… LUMENS & DIRECTIONAL LAMPS. While lumens can be a guide to measure directional lamps, they do not tell the full story. Directional lamps ar ...
... It’s important to note that lumens are measured at the source. However in directional bulbs, what matters is the amount of light that is landing on the surface… LUMENS & DIRECTIONAL LAMPS. While lumens can be a guide to measure directional lamps, they do not tell the full story. Directional lamps ar ...
Understanding LEDs
... ‘How often do I need to clean an LED fitting?’ A lot of users clean the fitting at the same time as they replace the lamp. Since LEDs have a much longer life, cleaning is not required often. In clean environments like offices, this may not be a problem especially since most LED fittings do not have ...
... ‘How often do I need to clean an LED fitting?’ A lot of users clean the fitting at the same time as they replace the lamp. Since LEDs have a much longer life, cleaning is not required often. In clean environments like offices, this may not be a problem especially since most LED fittings do not have ...
Light-emitting diode
A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode, which emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor.An LED is often small in area (less than 1 mm2) and integrated optical components may be used to shape its radiation pattern.Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared light.Infrared LEDs are still frequently used as transmitting elements in remote-control circuits, such as those in remote controls for a wide variety of consumer electronics.The first visible-light LEDs were also of low intensity, and limited to red. Modern LEDs are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness.Early LEDs were often used as indicator lamps for electronic devices, replacing small incandescent bulbs. They were soon packaged into numeric readouts in the form of seven-segment displays, and were commonly seen in digital clocks.Recent developments in LEDs permit them to be used in environmental and task lighting. LEDs have many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster switching. Light-emitting diodes are now used in applications as diverse as aviation lighting, automotive headlamps, advertising, general lighting, traffic signals, camera flashes and even LED wallpaper. As of 2015, LEDs powerful enough for room lighting remain somewhat more expensive, and require more precise current and heat management, than compact fluorescent lamp sources of comparable output.LEDs have allowed new text, video displays, and sensors to be developed, while their high switching rates are also useful in advanced communications technology.