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AN2300 Datasheet(PDF) 5 Page - STMicroelectronics |
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AN2300 Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 21 page AN2300 Capacitive converter Rev1 5/21 1 Capacitive converter The schematic of the Capacitive power supply is shown in Figure 1. The capacitor C2 accommodates the AC mains voltage to a voltage level suitable for the application, while R1 and R2 are connected in order to limit the inrush current of the capacitors. The voltage is then rectified by the diode D1 and regulated by means of zener diodes and electrolytic capacitors. The output capacitor values, C4 and C6, have been chosen in order to keep the output voltages ripples below 5%, at the given output load condition. The part list of the converter is given in Table 2. Figure 1. Capacitive converter schematic Table 2. Capacitive converter part list Reference Value Part type R1 10 Ω 1/4Ω Resistor R2 150K Ω 1/4Ω Resistor C1 47nF X2 Capacitor C2 2.2 µF X2 Capacitor C3 82nF Ceramic capacitor C4 10002 µF, 25V Electrolytic Capacitor C5 82nF Ceramic capacitor C6 4700 µF, 25V Electrolytic Capacitor D1 Diode 1N4007 D2 Diode 1N4007 Dz1 12V Zener Diode 1N5349B730 Dz2 5.1V Zener Diode BZX85C5V1 Vin D1 Dz2 R2 C3 C6 C1 C4 C2 Vout1 Dz1 D2 R1 Neutral Vout2 Line C5 |
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Similar Description - AN2300 |
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