This driver integrates an MBI6651chip (TO252 packaging) as the step-down DC-DC converter. It is a high efficient chip which is designed to deliver constant current to light up high power LED. Features of MBI6651 help make its applications safer, such as UVLO (under voltage lock out), over temperature protection, LED open-circuited protection and LED short-circuited protection. Moreover, thermal protection (TP) function has been introduced to protect IC from overheating (165°C) in various applications.