DC/DC converter

The invention discloses a DC/DC converter. The DC/DC converter comprises a BUCK converter, a push-pull converter, a control circuit and a driving circuit, wherein the push-pull converter is used for rectifying a synchronous rectification tube, and the DC/DC converter is characterized by also compris...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	CUI HONGZHU, ZHANG ZHICHENG, LAN DONGSHENG
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 invention discloses a DC/DC converter. The DC/DC converter comprises a BUCK converter, a push-pull converter, a control circuit and a driving circuit, wherein the push-pull converter is used for rectifying a synchronous rectification tube, and the DC/DC converter is characterized by also comprising a voltage detection circuit. The working state of the synchronous rectification tube of the push-pull converter is controlled through detecting a voltage value of a positive output end of the BUCK converter by a voltage detection circuit, a secondary-side synchronous rectification tube of the push-pull converter works in a diode rectification state before the voltage value of the positive output end of the BUCK converter does not reach a voltage value of steady-state working, a path of current of an output end of the DC/DC converter poured into an input end is cut off, so that the power switch tube of the BUCK converter is not damaged, and meanwhile, the efficiency of the DC/DC converteris not affected during s