本文主要為研製一具有4組輸出之直流/直流轉換器(DC/DC Converter),其電路設計包含一具有+5V和+3.3V輸出的順向式轉換器(Forward Converter),和一供給+5Vsb及-12V輸出的返馳式轉換器(Fly-back Converter),又稱為輔助電路(Auxiliary Circuit)。 其規格如下: 輸入電壓:DC +380V及AC 90V~265V 輸出電壓及電流:+5V(30A),+3.3V(28A),+5Vsb(2A), -12V(0.8A) 輸出功率:260W 本文所研製之轉換器具有應用於桌上型電腦之主機板,並且以實驗結果驗證設計與實作。
The objective of this thesis is to design and implement a DC/DC converter which has four outputs. The designed and implemented circuit consists of a forward converter which gives outputs of 5V and 3.3 V, and a fly-back converter, called auxiliary circuit, which provides outputs of -12V and +5V. The specifications are as follows. Input voltage: DC +380V and AC 90V~265V Output voltages and current:+5V(30A), +3.3V(28A), +5Vsb(2A), -12V(0.8A) Total output watts: 260W The details for the design and implementation are presented in this thesis. The implemented converter can be applied to PC mother board. Experimental results confirm the design and implementation.