Power supply device and sound equipment using same

The invention relates to the field of power supplies, in particular to a power supply device and sound equipment. The power supply device comprises a DC-DC isolation type switching power supply module, a low-pass filtering module, a linear power supply module and a supplementary power supply module,...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SONG JIURU, SONG XUESONG
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention relates to the field of power supplies, in particular to a power supply device and sound equipment. The power supply device comprises a DC-DC isolation type switching power supply module, a low-pass filtering module, a linear power supply module and a supplementary power supply module, the input end of the switching power supply module is connected with an external DC power supply, and the output end of the DC-DC isolation type switching power supply module is connected with the input end of the low-pass filtering module. The output end of the low-pass filtering module is connected with the input end of the linear power supply module, and the output end of the supplementary power supply module is connected with the output end of the linear power supply module. According to the invention, the output end of the switching power supply is connected with the input end of the linear power supply module. Therefore, the switching power supply not only has the advantages of high efficiency, small size an