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Practical and Novel Flyback Switching Power Supply

Meng Tian-xin

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Abstract

A practical and novel flyback switching power supply was designed,which has 7 isolated outputs. The working principle of the designed power supply was analyzed. A new design method was using in transformer design process. The clamping diodes were selected as leakage inductance absorption circuit. The peripheral control circuits of UC3844 were designed in detail. Experimental results of the 57 W prototype show that the designed switching power supply has the following features:good performance of the regulator,small ripple and high efficiency. It has high practical value.

About this research paper

What this paper is about

A practical and novel flyback switching power supply was designed,which has 7 isolated outputs. The working principle of the designed power supply was analyzed. A new design method was using in transformer design process. The clamping diodes were selected as leakage inductance absorption circuit. The peripheral control circuits of UC3844 were designed in detail. Experimental results of the 57 W prototype show that the designed switching power supply has the following features:good performance of the regulator,small ripple and high efficiency. It has high practical value.

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Available abstract

A practical and novel flyback switching power supply was designed,which has 7 isolated outputs. The working principle of the designed power supply was analyzed. A new design method was using in transformer design process. The clamping diodes were selected as leakage inductance absorption circuit. The peripheral control circuits of UC3844 were designed in detail. Experimental results of the 57 W prototype show that the designed switching power supply has the following features:good performance of the regulator,small ripple and high efficiency. It has high practical value.

Key concepts: Flyback transformer, Flyback diode, Switched-mode power supply, Ripple, Switching power, Clamping, Transformer, Leakage inductance

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