升压电路原理图1 2 3 4 A out+ L1 70uH 12V 12V+ A T1 MBR2045 D6 1N4148 R27 10/0.5W T2 D3 1N4148 MAX6008 Q1 14 16 13 12 11 15 10 E2 TL494 GND C1 B 7 9 8 E1 +V2 -V2 OC R1 10K S8550 COMP VREF VCC CT 5 U2 DTC RT 6 +V1 B 1 2 -V1 3 R24 R28 C6 4K7 LED 绿 C7 R2 R11 4K7 5K1 com GND 1000U25V 1000U25V C2 C3 R26 4K7 106 R29 C9 10K 102 20K 106 gnd R30 C8 1M 104 C 4 C2 C 12V 5V R31 R51 R32 R51 R33 R51 C10 5 R34 104 30K 8 7 6 MC34063 U3 IDC ISWC IPK ISWE R36 R37 510 1K 1 R38 2 3 D5 4 C11 1N5819 331 GND C12 1K L2 T4 J1 47UF/16V B772 200UH 4 3 2 1 CON4 VCC TCAP COMP GND R35 10K R13 47K D D Title Size A4 Date: File: 1 2 Number 90W升压器电路原理图 Revision Sheet of Drawn By: 4 2012/7/1 C:\Users\..\10A.Sch 3 ……