Single chip controlled power supply apparatus

• Main Authors: LIN YAOLIANG, LIU JIELIANG, HUANG WEIQIANG
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2010
• 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 invention discloses a power device controlled by a single chip. The power device comprises an AC input circuit, a filter network circuit, a rectifier bridge circuit, a flyback topology circuit, a main output circuit, a feedback network circuit, a control IC circuit, a slave output circuit and a compensation network circuit, where the input of the slave output circuit is connected with a central tap of an output winding of a transformer of the flyback topology circuit; and the compensation network circuit is connected between the main output circuit and the slave output circuit. By using the central tap of the output winding of the transformer as the main output, the power device can achieve relatively stable slave output voltage by fully utilizing the stability characteristic of the main output voltage, thereby simplifying the design and the debugging of the entire power device, lowering the cost and improving the circuit stability. With the aid of the compensation network circuit, the power device can st