MT7933

Maximizing IC Performance MT7933 Single Stage, High PFC, AC-DC LED Driver DESCRIPTION MT7933 is a single-stage，primary side control AC-DC LED driver with active power factor correction. MT7933 integrates on-chip PFC circuit operates in critical conduction mode (CRM) to achieve high power factor and reduce the power MOSFET switching loss. With MAXIC Proprietary control technique, precision LED current is achieved without secondary side sense and feedback circuit including opto-coupler. MT7933 provides various protections, such as over current protection (OCP), over voltage protection (OVP), short circuit protection (SCP) and over temperature protection (OTP), etc, to improve system reliability. Typical Application Circuit FEATURES  Single-stage Active PFC for high power factor and low THD  Primary side control eliminates opto-coupler  High precision LED current (+/-3%)  Critical Conduction Mode operation  Up to 20W driving capability.  Cycle-by-cycle current limit...