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.

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 60W driving capability.
Cycle-by-cycle current limiting
Under-voltage lockout (UVLO) protection
VDD and output over voltage protection
Adjustable constant current and output power setting
Power on soft-start
Compact SOT23-6 package