RT7306DGS (RICHTEK)

The RT7306DGS from Richtek is a primary-side regulation dimmable LED driver controller with active-PFC in 8 pin SOP package. This is a constant current LED driver with active power factor correction supports high power factor across a wide range of line voltages and it drives the converter in the Quasi-Resonant (QR) mode to achieve higher efficiency. By using primary side regulation (PSR) it controls output current accurately without a shunt regulator and an opto-coupler at secondary side, reducing external component count, cost and volume of driver board. An in-house design high voltage (HV) start-up device is integrated in the RT7306D to minimize the power loss and shorten the start-up time. It embeds comprehensive protection functions for robust designs, including LED open-circuit protection, LED short-circuit protection, output diode short-circuit protection, VDD UVLO, VDD OVP, OTP and cycle-by-cycle current limitation. It is used in AC-DC LED lighting driver.