FAQ 1. Certification -Our primary concern about Acriche is safety issue because of high voltage operation. - Our material which is used in Acriche (PCB, connector, resistor, wire) is approved by UL. - Acriche is approved by CE & TUV in November 2007. - We are also proceeding UL certification about Acriche. We expect to get approval in the first half of year 2008 2. About flicker - Flicker is phenomenon that people can recognize the fluctuation of brightness. - In the conventional lamp, flicker occurs when the light source is old or when the ballast or input voltage condition is not good. - Acriche operates by AC 50~ 60 Hz, but it turns on and off 100~120 times a sec, so human can’t feel flicker. 1 FAQ 3. Electrostatic, Surge, Insulation Voltage or EMC - With 4KV electrostatic discharge(EN61000-6-1 standard), it shows normal operating property (Criterion A) - With 1KV surge, during the test, Acriche flickered temporarily, but it was recovered after test by itself (Criterion B) - In case of insulation voltage test, Emitter type is 2000V and PCB type is 6000V. - About EMC Test, there is no EMI problem from Acriche and there is no EMS problem. 4. Rated current - A rated current of Acriche emitter is 20mA RMS. RMS (root mean square) is way to express energy amount of AC source. - Current in Acriche is varied by input voltage from AC source. If over current occurs from over voltage, it can destroy Emitter or resistor. 2 FAQ 5. PCB - In Acriche, there is no limitation about using PCB. - We just recommend to use Acriche with Tj 90℃ below. If Tj is lower, the lifetime would be longer. - We don’t recommend to use FR4 PCB If there isn’t special thermal management system. - To design a PCB for Acriche, refer to the foot print in the spec. - Check a insulation voltage of PCB. f 3 FAQ 6. Collimator < A2 Collimator > - designed for AW2214 20 ˚ 35 ˚ - 15 ~ 35 ˚ Viewing angle - 24.7x15.7 mm - 200~500 lx 15 ˚ < A3 Collimator > - rayset data is available in the marketing team - Now developing - 1Q. 08 Sample available - Around 37x20 mm 4 FAQ 7. About voltage fluctuation - As input voltage changes, current and brightness of Acriche also change. When input voltage changes 10%, current and light output change about 25%. - In voltage vs current graph, as voltage varies from 230V to 260V, current changes from 20mA to 26mA. - In unstable voltage application, we can reduce current fluctuation and power consumption by using PTC (Positive Thermal Coefficient) 35 40 powe(W) 20 40 30 PF 15 10 Current(mA) 25 50 230V Current [RMS , mA] 30 Current(mA) 20 20 10 200V resister 200V VR 230V resister 230V VR 260V resister 260V VR 10 5 0 150 30 0 0 200 250 300 50 100 150 200 Voltage [RMS , V] <Acriche datasheet> 250 0 0 10 20 30 40 50 60 70 80 90 Time(min) <Input Voltage vs Current> 5 FAQ 8. High Input Voltage test < AW2214 > Input voltage [V] RMS 110 150 180 200 220 230 240 Current [mA] RMS 20 46.6 66.7 73.8 93.8 100.5 107.5 start to smoke from resistor < AW3211 > Input voltage [V] RMS 90 100 110 120 130 140 150 160 170 180 200 220 19.8 31.9 42.6 43.4 44.5 49.0 53.9 59.2 64.3 69.2 84.1 -open 17.2 29.7 44.1 59.8 76.7 94.6 112.4 -open 32 44.4 58.5 64.7 72.3 79.8 90.9 102.1 30.5 42.3 58.6 78.1 100.6 126.8 157.2 -open PTC Current [mA] RMS resistor 114.3 125.2 152.7 -open PTC Temp [℃] resistor - Temp : board temperature [℃] - The product with PTC is more stable for high input voltage condition - Test result could be different according to type of resistor, heat sink and ambient temperature 6 FAQ < AW3221 > Input voltage [V] RMS 200 210 220 230 240 250 260 270 280 290 300 14.5 18.1 21.7 24.5 21.7 22.1 23.1 24.3 25.5 27.1 28.5 PTC 14.1 17.5 20.9 24.5 28.2 32.0 35.9 39.9 44.1 48.3 52.5 resistor 36.9 48.7 59.4 68.7 69.8 73.0 76.5 81.1 86.8 91.2 97.0 PTC 38.6 49.7 59.4 68.2 77.9 87.8 98.2 109.2 121.8 135.5 148.2 resistor Current [mA] RMS Temp [℃] -Temp : board temperature [℃] - No open below 300V (Our max supplying voltage) - Test result could be different according to type of resistor, heat sink and ambient temperature 7