LYT5216D-TL Power Integrations

LYT5216-5228 LYTSwitch-5 Family Single-Stage LED Driver IC with Combined PFC and Constant Current Output in Isolated and Non-Isolated Topologies Product Highlights Combined 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 LYTSwitch-5 High switching frequency and DCM allow compact magnetics L D CONTROL DS Design Flexibility DO FB BP OC S 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 PI-7711-121015 Figure 1a. Typical Application Schematic: Isolated Flyback. Highest Reliability No electrolytic bulk capacitors or optoisolators for increased lifetime Comprehensive 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 LYTSwitch-5 L D CONTROL Description DS DO FB BP OC S 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 discon- PI-7799-121015 tinuous mode, variable frequency, variable on-time controller. The Figure 1b. Typical Application Schematic: Non-Isolated Buck. controller also provides fast (cycle-by-cycle) current limit, input and output OVP, plus advanced thermal management circuitry. Output Power Table The combination of a low-side switching topology, cooling via electroni- 1 cally quiet SOURCE pins and frequency jitter ensures extremely low EMI. Output Power 2 This reduces the size of the input filter components greatly reducing Product 90-308 VAC audible noise. LYT5225D 9 W The part numbers shown in Table 1 describe 3 different power levels and two MOSFET voltage options to cost-optimize designs, while EcoSmart LYT5216D, LYT5226D 16 W switching technology ensures maximum efcfi iency for each device size LYT5218D, LYT5228D 25 W and load condition. Table 1. Output Power Table. Notes: 1. Maximum practical continuous power in an open frame design with adequate heat sinking, measured at 50C ambient (see Key Applications Considerations for more information). 2. Package: D: SO-16B. Figure 2. SO-16B (D Package). www.power.com March 2016 This Product is Covered by Patents and/or Pending Patent Applications.LYT5216-5228 BYPASS DRAIN (BP) (D) REGULATOR 5.25 V UV LINE-SENSE (L) 4.7 V LOV V LOV I LIM I LIM SOA CURRENT LIMIT S Q SOA V I LIM LOV R Q UV V ZC FB + V ZC V FB(SK) UPDATE + FREQUENCY AND DUTY CYCLE CONTROL FEEDBACK (FB) V FB V FB(AR) OUTPUT COMPENSATION (OC) I FB MULTIPLIER Enable DRIVER CURRENT SENSING (EN) FAULT (DS) AUTO-RESTART HANDLING S Q R Q SOURCE (S) DATA OUTPUT (DO) PI-7753-110215 Figure 3. Block Diagram. 2 Rev. C 03/16 www.power.com