Circuit for suppressing ringing problem of switching power supply

The utility model discloses a circuit for suppressing a ringing problem of a switching power supply. The circuit comprises a DC-DC conversion circuit and an RC buffer module, wherein the RC buffer module is connected to the DC-DC conversion circuit; the RC buffer module comprises a capacitor C2 and...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HONG LINGYUAN, ZHANG JIE, WU HAIFENG, YU XIAOPING, ZOU ZHUOYE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	The utility model discloses a circuit for suppressing a ringing problem of a switching power supply. The circuit comprises a DC-DC conversion circuit and an RC buffer module, wherein the RC buffer module is connected to the DC-DC conversion circuit; the RC buffer module comprises a capacitor C2 and a resistor R1 which are connected in series; in the DC-DC conversion circuit, the drain electrode of a switch MOS tube is connected with the positive electrode of a power supply, the grid electrode of the switch MOS tube is connected with the driving end of the MCU, the source electrode of the switch MOS tube is connected with the negative electrode of a diode and one end of a coil L2, the other end of the coil L2 is connected with one end of a load V0, and the other end of the load V0 is connected with the ground, the positive electrode of the diode and the negative electrode of the power supply. The RC buffer module is connected in parallel with two ends of the diode D1. The circuit provided by the utility model