LED-Driver Reference Designs

Power Integrations (San Jose, CA) recently announced two new reference designs describing high-efficiency, non-isolated, high-power-factor (PF) LED drivers for T8 tubes. The designs feature low component count and leverage simple magnetics and single-sided boards yielding power densities of 14.2 W/in³. Based on the LNK460KG LED driver from Power Integrations’ LinkSwitch-PL family of ICs, the circuits detailed in DER-337 (high-line) and DER-345 (low-line) use single-stage non-isolated topologies which result in a profile of only 8 mm - small enough to be mounted behind the LEDs in the T8 tube.