Single-tube Boost-Buck-Boost converter

• Main Authors: ZHANG BO, FU JIAN, QIU DONGYUAN, XIAO WENXUN, HUANG ZITIAN
• Format: Patent
• Language: Chinese; English
• Published: 10.09.2014
• Subjects: 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

The utility model provides a single-tube Boost-Buck-Boost converter. According to the utility model, a direct-current power supply (Vin), a switching tube (S), a first diode (D1), a third diode (D3) and a first capacitor (C1) forms an input Boost converter, and the first capacitor (C1), the switching tube (S), a second diode (D2), a second capacitor (C2) and a load (R) forms an output Buck-Boost converter. Only one switching tube (S) achieves the cascading of the Boost converter with the Buck-Boost converter, and a gain can reach D/(1-D)2. In addition, an input current of the cascading converter is continuous, thereby well facilitating the filtering of the input current.