What is an LED driver?
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Regardless of type, size, or power, all LEDs work best when driven with a constant current source since LED color changes with small variations in driving current. LEDs often support varying system voltages and forward voltages, which can cause variations in LED brightness and color. An LED driver is a self-contained power supply that has outputs matched to the electrical characteristics of your LED or array of LEDs. There are currently no industry standards (as of 2009), so understanding the electrical characteristics of your LED or array is critical in selecting or designing a driver circuit. Drivers should be current-regulated (deliver a consistent current over a range of load voltages). Drivers may also offer dimming by means of pulse width modulation (PWM) circuits. Drivers may have more than one channel for separate control of different LEDs or arrays. |
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| 2012-04-24 | Linear debuts 100V constant-current, constant-voltage controller Linear's LT3796 is a high-side current sense DC/DC controller designed to regulate a constant-current or constant-voltage for driving high brightness (HB) LEDs. |
| 2012-04-17 | SMT LEDs offer up to 110lm from 1W SMT LEDs offer up to 110lm from 1W |
| 2012-03-30 | LEDs rule over traditional lamps in UV apps LEDs rule over traditional lamps in UV apps |
| 2012-03-20 | Twin Creeks claims 50% lower solar cell cost Twin Creeks boasts a new ultra-thin manufacturing process targeted at advanced production of LEDs and CMOS image sensors that claims to greatly reduce silicon and other substrate material costs. |
| 2012-03-05 | LEDs offer high luminous flux up to 113.6lm LEDs offer high luminous flux up to 113.6lm |
| 2012-02-24 | White LED lenses reduce system cost LEDiL rolls 33 lenses qualified for use with Cree's XLamp XT-E white LEDs that claim a reduction in the number of LEDs required in a lighting system, leading to smaller power supplies and heat. |
| 2012-02-10 | Automated sol'n optimises HB LED fabrication EV Group' EVG620HBL is an automated mask alignment system that is designed to optimise the fabrication of high-brightness (HB) LEDs, compound semiconductors and power electronics. |
| 2012-02-13 | Reference design for LM3466 Here's a look at the design of an LM3466 evaluation board that drives 5 LED strings, each of which consists of 14 LEDs. |
| 2012-02-08 | 3-ch LED driver delivers sub-µs PWM dimming Supertex's HV9989 is a three channel, boost LED driver IC designed to drive strings of either RGB LEDS or multiple strings of white LEDs in LCD backlighting applications. |
| 2012-02-01 | Flash LEDs aim for thinner digital cameras Flash LEDs aim for thinner digital cameras |
| 2012-01-30 | Ultra-bright LEDs tip low profile in SMD 0603 Ultra-bright LEDs tip low profile in SMD 0603 |
| 2012-02-02 | Using LM3492 LED driver for AR111 app Read about the LM3492 demonstration board designed for converting nominal 12VAC from electronic transformer output to drive seven series connected LEDs at 360-mA average current. |
| 2012-01-31 | Eval board for LM3448 Read about LM3448, a non-isolated LED driver solution that can be used to power a single LED string consisting of eight to twelve series connected LEDs. |
| 2012-01-17 | NXP, Philips enhance solar street lighting NXP Semiconductors' Solar Gen2 street lighting delivers 98 per cent PV efficiency by combining Philips Lighting high brightness LEDs and optics with NXP's MPT61x charge controllers. |
| 2012-01-16 | Compact LEDs tout high lumen density Compact LEDs tout high lumen density |
| 2011-12-28 | Boost converters pack 35V power switch ZMDI's ZLED7015 step-up converter integrates 35V power switch for high brightness LEDs. |
| 2011-12-19 | Luminus LEDs are brighter for medical apps Luminus LEDs are brighter for medical apps |
| 2011-12-07 | LED drivers ICs offer programmable current o/p Allegro MicroSystems' automotive-grade, high-current LED drivers offer a programmable constant current output for driving high power LEDs in series. |
| 2011-11-23 | LEDs share to go up in lighting market LEDs share to go up in lighting market |
| 2011-11-17 | Graphene features high thermal conductivity Researchers from South Korea and U.S. reveal high electrical and thermal conductivities of graphene, in addition to the transparency it offers for UV LEDs. |
| 2011-11-17 | Guarding HB LEDs with PPTC devices Guarding HB LEDs with PPTC devices |
| 2011-11-02 | Mini LEDs offer luminous intensity to 1400mcd Mini LEDs offer luminous intensity to 1400mcd |
| 2011-10-31 | LED sol'n delivers high flux density Bridgelux unleashes the Micro SM4, a LED solution that is said to be ideal for applications where discrete LEDs are preferred. |
| 2011-09-14 | LED lighting set for sweeping growth Technological improvements and legal regulations will facilitate a sweeping deployment of LEDs in lighting applications, according to Frost & Sullivan. |
| 2011-09-02 | 700mA LEDs claim high brightness 700mA LEDs claim high brightness |
| 2011-08-24 | LEDs designed for lighting colour homogeneity LEDs designed for lighting colour homogeneity |
| 2011-08-18 | GaN-on-Si LEDs tout record-high Lm/W values GaN-on-Si LEDs tout record-high Lm/W values |
| 2011-08-15 | Issues in using LEDs in retrofit lamps Issues in using LEDs in retrofit lamps |
| 2011-08-15 | Enhance UI in appliances using LED Know the tradeoffs when integrating LEDs in today's smart appliances to achieve an advanced user interface and a high-end aesthetic. |
| 2011-08-03 | LEDs serve as optical WLAN to transfer video LEDs serve as optical WLAN to transfer video |
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