Encapsulated AC-DC Converter APPLICATION NOTE 1. Screws for Switching Power Supply (AQS & AQF Series) Please be aware the length of screw should not be longer than 3 mm while you mounting/ adopting our power supply on your end application, in case screw break through Mylar or PCB Board result in short circuit. 2. AC Input Line Connection The pin of AC line (L), ac neutral (N), and the third wire safety ground (FG) should be retained from the AC power outlet to the power supply input terminals without accidental interchange. (Figure 1.1) (Figure 1.1) The FG pin should be connected to the equipment where power supply is placed as thicker and shorter to protect electric shock or noise interference. (Figure 1.2) (Figure 1.2) http://www.archcorp.com.tw TEL: +886-2-26989508 FAX: +886-2-26981319 -1- Encapsulated AC-DC Converter APPLICATION NOTE 3. Series and parallel operation I. Series operation Most power converters can be operated in series if they have overload limitation by either constant current or constant power circuits. To protect each output from the reverse voltage applied by the other unit in the event of load short circuits, reverse biased diodes are used as shown in Figure 2.1. (Figure 2.1) II. Parallel operation This is only recommended with power converters specifically designed for parallel connection. In the parallel redundant scheme illustrated in Figure 2.2 one of the power converters could be replaced by a battery followed by a DC-DC converter to provide a no-break power system in the event of main supply failure. (Figure 2.2) 4. Reduce the output ripple and noise Using a LC filter or a Capacitor reduces the output ripple and noise. (Figure 3.1) (Figure 3.1) http://www.archcorp.com.tw TEL: +886-2-26989508 FAX: +886-2-26981319 -2- Encapsulated AC-DC Converter APPLICATION NOTE 5. Class I suggested circuit for lowering EMI circuitary connection Class II suggested circuit for general application circuitary connection Item 1 Location F1 Description AHC/APCN/ATCN/ANCN Slow blow Fuse 1.5A/250V AIC/AOC/AUC/AVC/AKC/MTC/MFC15/MTC30 Slow blow Fuse 2A/250V AOCH/ALC/AHC08 Slow blow Fuse 2A/300V AYC/AZC/AFC20/ASC/ATC30/AJC/ANC50/AES60/AQC100/MSC/MSC60 Slow blow Fuse 3.15A/250V 2 RV1 3 RV2 4 RV3 5 C1 6 L1 AQC125 Slow blow Fuse 4A/250V Vin(max)=264 14S471K or 20S471K Vin(max)=305 14S561K or 20S561K Vin(max)=264 14S471K or 20S471K Vin(max)=305 14S561K or 20S561K Vin(max)=264 14S471K or 20S471K Vin(max)=305 14S561K or 20S561K X Capacitor 0.1uF~0.68uF 300V X1 http://www.archcorp.com.tw TEL: +886-2-26989508 FAX: +886-2-26981319 10~50mH -3- Encapsulated AC-DC Converter APPLICATION NOTE Item 7 Location D1 Description TVS (Vout=3.3V) SMBJ5.0A or 600W↑ (Peak) TVS (Vout=5V) SMBJ7.0A or 600W↑ (Peak) TVS (Vout=9V) SMBJ12A or 600W↑ (Peak) TVS (Vout=12V) SMBJ20A or 600W↑ (Peak) TVS (Vout:15V) SMBJ20A or 600W↑ (Peak) TVS (Vout=24V) SMBJ30A or 600W↑ (Peak) TVS (Vout=48V) SMBJ64A or 600W↑ (Peak) 8 CY1 Y Capacitor 220pF~4700pF 250V Y2 9 CY2 Y Capacitor 220pF~4700pF 250V Y2 10 RT1 Φ8~Φ20 10R 11 L2 3.3uH~100uH 12 L3 3.3uH~100uH 13 C2 Aluminum 47uF or 47uF↑ 14 C3 Soild Capacitor 0.1uF 15 SA1 Surge absorber (Vout=5VDC) 3KV http://www.archcorp.com.tw TEL: +886-2-26989508 FAX: +886-2-26981319 -4-