The OB3330X is a high power factor, primary side regulation LED controller with advanced features to provide high efficiency control for LED lighting applications.  

OB3330X offers an internal start-up timer for stand-alone applications, an analog multiplier for power factor correction (PFC), zero current detectors (ZCD) to ensure transition mode (TM) operation, a current sensing comparator with built-in leading-edge blanking, and a totem pole output.

OB3330X offers good protection coverage including VCC under voltage lockout (UVLO), VCC over voltage protection, load voltage over voltage protection, Level selectable cycle-by-cycle current limiting, over temperature protection, LED open/short circuit protection and gate drive output clamping for external power MOSFET protection.



n Primary-Side Control with Single Stage PFC Topology

n Minimized BOM Count

n Transition Mode (TM) Operation to Achieve High Efficiency

n Analog multiplier for Power Factor Correction

n High Current Accuracy

n Cycle-by-Cycle Current Limiting (OCP)

n Selectable Threshold of OCP

n VCC Over Voltage Protection

n Output Over Voltage Protection

n Over-temperature Protection

n LED Open Circuit Protection

n LED Short Circuit Protection

n Soft-start

n VCC Under Voltage Lockout (UVLO)

n Ultra-low Start-up Current


n Industrial and Commercial LED lighting

n Residential LED lighting