50-W: 120-V AC Offline: LED Driver: No Magnetics: Reference Design for LED General Lighting
Description
This reference design uses TPS92410 and TPS92411 with 50-W output power for area lighting with all components on a single printed-circuit board (PCB). This design uses four TPS92411 stages allowing 16 different switch states during the rising and falling rectified-AC waveform: which optimizes the current-regulating MOSFET headroom. TPS92410 allows monotonic analog dimming down to 3% before shutting off the current regulator. Electromagnetic interference (EMI) filtering without magnetics has been included and designed to meet FCC Title 47 Part 15 Class-B conduction requirements.
Features
- Non-isolated 120-V AC offline LED driver with no magneticsEfficiency: 86.5%Power factor: 0.97THD: 10.5%FCC Title 47 Part 15 Class-B tested EMICurrent regulator for power factor correction with multiplier for line regulationAllows simple NTC thermal foldbackMonotonic analog dimming to 3% with shutdownDeeper dimming using TSNS input