Features

• LYTSwitch-3 series LED Driver AC-DC Converters. LYTSwitch-3 single-stage LED driver ICs with combined power factor correction and constant current outputs from Power Integrations. These devices incorporates a high-voltage power MOSFET and discontinuous mode, variable frequency, variable on-time controller integrated into a single chip. They can provide outstanding TRIAC dimming of LED lighting in isolated and non-isolated topologies and include a comprehensive range of protection features. Combined single-stage PFC plus constant current output drive Constant current regulation better than ±3% over line and load variations Power Factor >0.9 Ensures monotonic VA reduction with TRIAC phase angle change Low THD: 15% typical for dimmable bulbs, as low as 7% in optimized designs Detects leading-edge and trailing-edge TRIAC dimmers High-efficiency mode when no dimmer is present Selectable dimming profile increases design flexibility Fast turn-on time, ;500 ms Supports buck, buck-boost, tapped buck-boost, boost, isolated and non-isolated flyback topologies No electrolytic bulk capacitors or opto-isolators for increased reliability and operating life Input and output overvoltage protection Output short-circuit and open-loop protection End-stop shutdown provides protection during fault conditions Thermal control with fold-back ensures that light continues to be delivered at high temperatures