Step -down power adapter

The utility model discloses a step -down power adapter, including diode VD1, triode VT2, MOS manages VT1, resistance R1, electric capacity C1, A1 is put to inductance L1 and fortune, MOS pipe VT1's the D utmost point VCC that connects respectively, resistance R8, electric capacity C2 and diode...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: GUO YAXIAN, ZHANG ALING, ZHENG SIBEI
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:The utility model discloses a step -down power adapter, including diode VD1, triode VT2, MOS manages VT1, resistance R1, electric capacity C1, A1 is put to inductance L1 and fortune, MOS pipe VT1's the D utmost point VCC that connects respectively, resistance R8, electric capacity C2 and diode VD4 are anodal, diode VD1 negative pole is connected respectively to the resistance R8 other end and the A1 power end is put to fortune, ground connection diode VD2 negative pole is connected respectively to diode VD1 positive pole, the A1 earthing terminal is put to resistance R7 and fortune, grounded capacitance C1 and resistance R11 are connected respectively to the resistance R7 other end. The utility model discloses step -down power adapter does not use chip element control, and circuit structure is simple, and is with low costs, and diode VD8 and diode VD9 are added to inductance L1 one end, and the spike voltage clamper that inductance L1 produced because of the leakage inductance is to safe worth, improved circuit's stability, especially adapted using widely.