1 2 3 4 5 6 7 8 A B C D 87654321 D C B A Title Number RevisionSize A3 Date: 15-Dec-2009 Sheet of File: 我的文件夹 \M48 电源 \50V5A.ddb Drawn By: R57 180K R58 20K VCC R64 2K CX2 50v/0.1uf C29 63V/0.1uf R56 63V/472 C30 50v/0.1uf VCC C11 0.1UF/63V C8 0.1UF/63VC40 25V/1000UF C2 0.1UF/63V C41 25V/1000UF C3 0.1UF/63V R59 2K C42 25V/1000UF C43 25V/1000UF Vin1 G N D 2 Vout 3 U7 7812 C44 10V/1000UF +12V 15V -