LYT5218D Datasheet | Power Integrations

LYT5216-5228 LYTSwitch-5 Family Single-Stage LED Driver IC with bined PFC and Constant Current Output in Isolated and Non-Isolated Topologies Product Highlights bined Single-Stage PFC + Accurate CC Output - Accurate CC, better than ±3% - Power Factor >0.9 - Low THD, <10% with typical input and output conditions - >90% efficient in optimized designs - High switching frequency and DCM allow pact magnetics Design Flexibility - Supports buck, buck-boost, tapped-buck, boost, isolated and non-isolated flyback topologies - 2 MOSFET voltage options and 3 power levels for optimum device selection Highest Reliability - No electrolytic bulk capacitors or optoisolators for increased lifetime - prehensive protection Features - Input and output overvoltage - Open-loop protection - Advanced thermal control - Thermal foldback allows output light delivery at abnormally high ambient temperatures - Hysteretic shutdown provides protection during fault conditions Description The LYTSwitch™-5 family is ideal for single-stage power factor corrected constant current LED applications - bulbs, tubes and ballasts. Each device incorporates a high-voltage power MOSFET and discontinuous mode, variable frequency, variable on-time controller. The controller also provides fast (cycle-by-cycle) current limit, input and output OVP, plus advanced thermal management circuitry. The bination of a low-side switching topology, cooling via electronically quiet SOURCE pins and frequency jitter ensures extremely low EMI. This reduces the size of the input filter ponents - greatly reducing audible noise. The part numbers shown in Table 1 describe 3 different power levels and two MOSFET voltage options to cost-optimize designs, while Eco Smart™ switching technology ensures maximum efficiency for each device size and load condition. LYTSwitch-5 CONTROL BP OC Figure 1a. Typical Application Schematic: Isolated...