Multipath output flyback converter

Abstract

The invention relates to a multipath output flyback converter. The converter at least comprises a transformer, an input circuit, a first output circuit and a second output circuit. The transformer provides energy for the first output circuit through a first output winding and provides energy for the second output circuit through a second output winding. The second output circuit comprises a first rectification switch, a first reference error amplification circuit, a first PWM controller, a second rectification component and a second filtering capacitor. The first rectification switch is arranged between the second output winding of the transformer and the second filtering capacitor and is used for controlling energy output of the second output winding. The first PWM controller controls a conduction state of the first rectification switch through a second voltage signal output by the second output circuit detected by the first reference error amplification circuit so as to form a voltage-type negative feedback loop. By using the multipath output flyback converter of the invention, transmission of transformer side road winding energy is effectively controlled; and through a simple and high-efficient mode, an output voltage of a side road keeps high-stable precision.

Description

technical field [0001] The present invention relates to a multi-output flyback converter, more specifically, relates to a multi-output flyback converter with secondary side voltage stabilization control. Background technique [0002] The multi-output flyback converter has the advantages of simple structure design, small size, and low cost, so it is widely used in medium and low power application environments. For example, most of the current consumer power supplies and industrial control auxiliary power supplies use multi-output flyback converters. [0003] Such as figure 1 As shown, it is a schematic circuit diagram of a conventional multi-output flyback converter, which at least includes: a transformer T, an input circuit, a first output circuit and a second output circuit. Wherein, the input power converts and transmits energy through the input circuit to the first output circuit and the second output circuit for output through the transformer T. The output transformer...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a multi-output flyback converter in a simpler and more efficient way in view of the defects of the existing multi-output flyback converter's auxiliary circuit voltage stabilization method being complex or inefficient To meet the requirements of high precision and low adjustment rate of auxiliary output

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