EVB_RT8497AGS

CONFIDENTIAL RT8497A Evaluate Report for Non-isolation Floating Buck LED Driver (Internal T8) May. 2016 CONFIDENTIAL CONFIDENTIAL RT8497A Brief Introduction RT8497A is a active power factor correction controller, specifically designed for using as a constant current LED driver. Supporting : Non-isolation(Buck mode) Applications AC/DC LED lighting driver 2 CONFIDENTIAL CONFIDENTIAL RT8497A Features High Efficiency BCM LED Driver Controller for High Power Factor Offline Applications • • • • • • • Built-in Power MOSFET High Power Factor and THDi Constant LED current with Highly Precision Current regulation Extremely Low Quiescent Current Consumption. True Low System BOM Cost Unique Programmable AND pin for ZVS Setting to Achieve Best power Efficiency Universal Input Voltage Range with Off-Line Topology 3 CONFIDENTIAL CONFIDENTIAL RT8497A Advantage • Tight LED Current Regulation • Low BOM Cost • Protection: a. Built-in Over Thermal Protection b. Built-in Over Voltage Protection c. Output LED String Open protection d. Output LED String Short protection e. Output LED Over Current protection 4 CONFIDENTIAL CONFIDENTIAL Circuit 5 CONFIDENTIAL CONFIDENTIAL Electrical Performance Load: LED Series Frequency Vac [V] 60Hz 90 60Hz 100 60Hz 110 60Hz 132 50Hz 195 50Hz 220 50Hz 230 50Hz 240 50Hz 264 current regulation = △ Effiency = Maximum PFC = Minimum PFC = Line filter on Pin [watt] Vout[V] Iout[mA] Pout [watt] Total Eff. [%] PF Value THD [%] 19.108 19.045 19.023 19.043 19.234 19.299 19.303 19.328 19.415 1.38% 2.13% 0.961 0.909 78.70 78.60 78.60 78.60 78.50 78.50 78.50 78.50 78.50 222 223 223 224 225 225 224 224 224 17.448 17.496 17.544 17.630 17.647 17.631 17.600 17.592 17.560 91.31% 91.87% 92.22% 92.58% 91.75% 91.36% 91.18% 91.02% 90.45% 0.909 0.932 0.945 0.959 0.961 0.951 0.946 0.939 0.921 44.88 37.92 33.39 27.03 19.18 18.44 18.41 18.49 19.20 6 CONFIDENTIAL CONFIDENTIAL Efficiency 7 CONFIDENTIAL CONFIDENTIAL Power Factor 8 CONFIDENTIAL CONFIDENTIAL Current Regulation 9 CONFIDENTIAL CONFIDENTIAL Temperature (Test Condition: Burn-in 30min. @ Ta=25 ℃) 90Vac/60Hz input F1 Fuse, MST, T2A/300V CX1 X-cap, HQX, 104/250V LX2 DR0912, 3mH D1~D4 GS1M (1A/1000V) Film cap, 224/450V C2 U1 RT8497A C1 1206, 2.2nF/630V C5 1206, 4.7uF/50V R7,R10 1206, 2.2 ohm D6 ES1J (1A/600V) ZD1 BZT55C30 (30V, 0.5W) D7 SF28 (2A/600V) L1 (core) EFD-15, 450uH L1 (wire) EC1 E-cap, 100uF/100V 26.8 32.7 50.7 53.2 44.7 63.3 49.2 49.3 52.5 48.5 53 49.2 47.5 48.1 28.5 264Vac/50Hz input F1 Fuse, MST, T2A/300V CX1 X-cap, HQX, 104/250V LX2 DR0912, 3mH D1~D4 GS1M (1A/1000V) Film cap, 224/450V C2 U1 RT8497A C1 1206, 2.2nF/630V C5 1206, 4.7uF/50V R7,R10 1206, 2.2 ohm D6 ES1J (1A/600V) ZD1 BZT55C30 (30V, 0.5W) D7 SF28 (2A/600V) L1 (core) EFD-15, 450uH L1 (wire) EC1 E-cap, 100uF/100V 22.6 27.8 37.1 50.1 46.6 72.3 52.1 53.2 61.1 59.5 68.2 59.4 70.4 71.4 48.7 10 CONFIDENTIAL CONFIDENTIAL PCB Layout TOP Layer BOT Layer PCB No : PCB071_V1 11 CONFIDENTIAL CONFIDENTIAL Demo Board Photo L LED- N LED+ Length Width Height 123mm 16mm 12mm 12 CONFIDENTIAL CONFIDENTIAL BOM Item Location Value Type 1 CX1 0.1uF/275Vac CFS-12X12 2 C1 2.2nF/1kV C1206 3 C2 0.22uF/450V CFS-11X10-H1 4 C4 0.1uF C0805 5 C5 4.7uF/50V C1206 6 C7 100pF/1kV C1206 7 D1, D2, D3, D4 GS1M D-SMA 8 D6 SF18 D-SOD123 9 D7 SF28/DO-15 DIODE4-12MM 10 EC1 100uF/100V 11 F1 1.6A/300V 12 LX2 3mH/DR-0912 CES-10X23-H1 FUSE-SS-5F-2P5.08 LDS-D8X10 13 CONFIDENTIAL CONFIDENTIAL BOM Item Location Value Type 13 L1 450uH LT-EFD15 14 RX1 5.1k R1206 15 R1, R2 511k R1206 16 R5 200k R0805 17 R6 10R R0805 18 R7 2R R1206 19 R8 22R R1206 20 R9 100k R1206 21 R10 2R2 R1206 22 U1 RT8497AGS SOP-8 23 VR1 TVR07471 VR-7-5MM 24 ZD1, ZD2 30V D-SOD123 14 CONFIDENTIAL CONFIDENTIAL Transformer 15 CONFIDENTIAL CONFIDENTIAL Power Component Voltage Stress Test condition: 264Vac/50Hz input , 78V/230mA output Stead state Location Max rating (V) Measure De-rating U1 (Vds) 500 412 82.4% D7 600 416 69.3% Transient State Location Max rating (V) Measure De-rating U1 (Vds) 500 464 92.8% D7 600 412 68.7% 16 CONFIDENTIAL CONFIDENTIAL Start up waveform Vac_in = 90V T_start up =790ms Vac_in = 264V T_start up =336ms 17 CONFIDENTIAL CONFIDENTIAL Harmonic(IEC61000-3-2) 230Vac input Class C : Pass Class D : Pass 18 CONFIDENTIAL CONFIDENTIAL EMI-Conduction(1) 110Vac/60Hz-LPass (9kHz~150kHz) 110Vac/60Hz-L Pass (150kHz~30MHz) 19 CONFIDENTIAL CONFIDENTIAL EMI-Conduction(2) 110Vac/60Hz-NPass (9kHz~150kHz) 110Vac/60Hz-N Pass (150kHz~30MHz) 20 CONFIDENTIAL CONFIDENTIAL EMI-Conduction(3) 230Vac/60Hz-LPass (9kHz~150kHz) 230Vac/60Hz-L Pass (150kHz~30MHz) 21 CONFIDENTIAL CONFIDENTIAL EMI-Conduction(4) 230Vac/60Hz-NPass (9kHz~150kHz) 230Vac/60Hz-N Pass (150kHz~30MHz) 22 CONFIDENTIAL CONFIDENTIAL EMI-Radiation(1) 110Vac/60Hz-VPass 110Vac/60Hz-H Pass 23 CONFIDENTIAL CONFIDENTIAL EMI-Radiation(2) 230Vac/50Hz-VPass 230Vac/50Hz-H Pass 24 2 5