• Ventura Sunleaf India Private Limited

LED Driver IC

The VS339X0 is a high precision isolated PSR buck driver with active PFC, specially designed for universal input non-isolated fly back or boost-buck constant current LED lighting. The driver with on-chip PFC circuit achieves high power factor and low THD. Operating in critical conduction mode, the power MOSFET switching loss is reduced and the inductor is fully utilized.

The VS339X0 utilizes patent current sampling structure. Operating in PSR mode, it achieves high precision output current control without second feedback circuit. The VS339X0 utilizes patent excellent line regulation and load regulation. The line regulation can be changed by external components.

The VS339X0 offers rich protection functions to improve the system reliability. Including LED open circuit protection, LED short circuit protection. VCC under voltage protection, CS resistor open circuit protection and cycle by cycle current limit. All the protection functions are auto-recovery. The system reliability is further improved by the thermal regulation function. The output current is reduced when the driver is over temperature.