This application note presents a low-cost driver for LEDs that is compatible with TRIAC phase-control dimmers. The design gives luminaire manufacturers a low-cost, commonly available dimming option for home fixtures. A side benefit is that, when not wired to a dimmer, the unit's power factor is over 0.9. The design is based on the L6562A transitionmode PFC controller driving a single stage PFC-fl…

* For Constant Current, the board must be modified as described on page 8 of the user guide. * Streetlight applications require that the power supply designed to power an LED lamp must have high efficiency and at least an equivalent lifetime in order to guarantee maintenance-free operation during the life of the LED.

The VIPer22A is low cost monolithic smart power devices with integrated PWM controller designed to operate in the wide range input voltage, from 90 to 264Vac. The VIPer22A internal control circuit offers benefit such as: automatic burst mode in low load condition, overvoltage protection in hiccup mode, and large voltage range on the VDD pin.

The LM3450A evaluation board is designed to provide an AC to LED solution for a 30 W LED load. Specifically, it takes an AC mains input and converts it to a constant current output of 700 mA for a series string of 1 to 13 LEDs (maximum LED stack voltage of 45 V). There are two assembly versions designed to operate from two different nominal AC input voltages, 120 VAC or 230 VAC.

The document describes a power-factor corrected dimmable LED driver designed to drive an LED string of 18 V at a current of 0.38 A (both nominal) from an input voltage range of 90 VAC to 265 VAC. The LED driver utilizes the LNK403EG from Power Integrations.The design specifically eliminates electrolytic capacitors which limit operating life, especially when operated at high temperature.

This document is an engineering report describing a 0.5 W constant current LED driver power supply utilizing a LNK302P. This power supply is intended as a LED driver that can be used in emergence exit signs and neon light replacements.

This engineering report describes a power supply utilizing the LinkSwitch-TN device LNK306PN in a buck-converter topology.

This engineering report describes the design for a universal input, 22 V to 48 V, 180 mA LED driver. This power supply utilizes the LYT2004E device from the Power Integrations LYTSwitch-2 family.

The STEVAL-ILL066V1 evaluation board is a complete and configurable solution that efficiently controls a single dimmable high brightness LED string using the STLUX385A digital controller. The LED efficiency is high during all stages of dimming and the STEVAL-ILL066V1 can achieve a 92% efficiency during full load while maintaining a low, less than 200 mW power consumption during idle periods.

The STEVAL-ILL045V1 demonstration board showcases ST’s new LED driver chip, HVLED815PF.