RT7304AGE (RICHTEK)

The RT7304AGE from Richtek is a primary-side regulation LED driver controller with active-PFC in 6 pin SOT-23 package. It is a constant current LED driver with active power factor correction. It 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), the RT7304A controls the output current accurately without a shunt regulator and an opto-coupler at the secondary side, reducing the external component count, the cost and the volume of the driver board. The RT7304A embeds comprehensive protection functions for robust designs, including LED open-circuit protection, LED short-circuit protection, output diode short-circuit protection, VDD under-voltage lockout (UVLO), VDD over-voltage protection (VDD OVP), over-temperature protection (OTP) and cycle-by-cycle current limitation. It is used in AC/DC LED lighting driver.