AC220V转DC(12V15W )电源板AD设计硬件原理图+PCB文件，2层板设计，大小为100*55mm, ALTIUM设计的原理图+PCB文件，可以做为你的学习设计参考。 主要器件型号如下： Library Component Count : 24 Name Description ---------------------------------------------------------------------------------------------------- 2N3904 NPN General Purpose Amplifier 2N3906 PNP General Purpose Amplifier BRIDGE1 Diode Bridge CON2 Connector Cap Capacitor Cap Pol1 Polarized Capacitor (Radial) D Zener Zener Diode DIODE Diode 1N914 High Conductance Fast Diode EC ELECTRO2 Electrolytic Capacitor FP103 FUSE-H Header 2 Header, 2-Pin INDUCTOR2 NMOS-2 N-Channel Power MOSFET PC837 Optoisolator RES2-B Res Varistor Varistor (Voltage-Sensitive Resistor) T TR-2B TRANS1 UCC28051 Volt Reg Voltage Regulator