The RT7740GAGE is an AC-DC Controller and Regulator manufactured by Richtek and is ROHS Compliant. It is a SOT-23-6 package part. It is a high performance, high efficiency, and low PIN count AC-DC controller. It features active break load, cycle-by-cycle current limit protection, and overload protection with input overvoltage and thermal shutdown. This part is ideal for power adaptors, open frame power supplies, and other AC or DC systems. It is capable for working with high switching frequency and hence providing high efficiency.