Based on Power Integrations’ LNK457DG, a member of the innovative LinkSwitch-PL family of LED driver ICs optimized for compact, non-isolated installations, the company has introduced a new reference design (RDK-251) for a 5-watt offline LED driver that includes flicker-free TRIAC dimming and single-stage power factor correction (PFC).

The new design features a single constant-current output of 350 mA at a nominal LED string voltage of 15 V.

Using a standard AC mains TRIAC dimmer down to 1% (3 mA) without instability or flickering of the LED array, the output current can be reduced.

The supply is compatible with both low-cost, leading-edge dimmers and more sophisticated trailing-edge dimmers.

It operates over the universal AC input range (85 VAC to 265 VAC, 47 Hz to 63 Hz) and can withstand an input range of 0 VAC to 300 VAC.

The board fits inside a pear-shaped A19 LED replacement lamp with an E26/27 base. RDK-251 contains full power supply specifications, schematic, bill of materials, transformer documentation, printed circuit board layout, and performance data.

About Power Integrations
Power Integrations is the leading supplier of high-voltage integrated circuits used in energy-efficient power conversion. The company’s innovative technology enables compact, energy-efficient power supplies in a wide range of electronic products, in AC-DC, DC-DC and LED lighting applications.