Mar 2 2011
Supplier of high-voltage integrated circuits, Power Integrations has released a new, compact LED driver reference design (RD-268) for standard candelabra-shaped bulbs.
The reference design is based on Power Integrations’ LinkSwitch-PL LED driver integrated circuits, LNK454DG. The series has reduced total harmonic distortion, high power factor and TRIAC dimming support.
The LinkSwitch-PL series, which was launched in 2010, allows continuous-current, TRIAC-dimmable drivers for solid-state lighting applications. The LED driver series is designed to provide about 16 W of output power, function across a broad input voltage range and deliver direct LED current sensing. A novel control algorithm offers TRIAC dimming that does not flicker and reduces the number of external parts. All systems feature a hysteretic thermal shutdown, cycle-by-cycle current limit, frequency jittering, one-stage power factor correction, 725 V power MOSFET and discontinuous-mode variable-on-time/variable-frequency controller.
The LED driver reference design addresses the needs of the normal candelabra-style bulbs and offers a 366 mA continuous current output with 3 V LED voltage for 1.1 W. This results in around 100 lm output of light that is similar to a 15 W standard incandescent candelabra bulb.
The reference design can function from 85 to 300 V AC and enables developers to create bulbs that are ideal for all areas and boost both field reliability and durability in case of line slumps. The low total harmonic distortion and high power factor allows a single design to be utilized in numerous lamps, where the total energy consumption surpasses diverse regional power quality specifications at 5 and 25 W.
Power Integrations’ Product Marketing Manager, David New stated that the reference design reinforces the company’s capability to deliver LED driver integrated circuits that offer exceptional performance.