RT8487 / RT8497 AC/DC Non-Isolated BCM Floating Buck LED Driver Controller with Excellent Compatibility Key Specifications Self-biasing Floating Buck with PFC True average LED current sensing High efficient BCM with resonant tuning Transformer-free design Low BOM cost and simple design Special Low THD algorithm for Buck: Fulfills IEC61000-3-2 Class C Buck-Boost configuration also possible RT8487 for 10W high PF reference design Meets IEC61000-3-2 Low THD Vin(V rms) Current regulation over line voltage=0.2% class C requirements ILED(mA) Pout(W) Efficiency THD 110 206.4 9.9 90.2% 19.4% 120 206.3 9.9 90.2% 17.7% 230 206.4 9.9 88.7% 13.2% 264 206.7 10.0 88.0% 12.4% RT8497 for 8W High PF reference design Built-in 620V/1.8A MOSFET Meets IEC61000-3-2 Low THD Vin(V rms) Current regulation over line voltage =0.5% class C requirements ILED(mA) Pout(W) Efficiency THD 110 292 7.98 85.6% 11% 120 292 7.98 86.3% 10% 230 294 8.11 86.0% 15% 264 395 8.14 85.4% 17% AC/DC self-biasing floating Buck product family Product RT8487 RT8479 Description self-biasing floating Buck LED driver controller self-biasing floating Buck LED driver with built-in 620V/1.8A MOSFET High Power Factor Built-in MOSFET √ √ Package TSOT-23-6 √ SOP-7