Switch-capacitor ac step-down circuit

Abstract

Abstract PURPOSE: To converge and output voltage into a set range by changing a capacitor potential division coefficient by converting the connection relation of capacitors corresponding to the changeover of a witching element. CONSTITUTION: The fluctuation of the output voltage is mainly caused by the fluctuation of an input voltage and the fluctuation of a load. Then, a compactor circuit 1A monitors the input voltage and when it exceeds a certain voltage, a switch 2A is turned off so that serial capacitance is decreased, the potential division coefficient is lowered and the increase of the output voltage is suppressed. When the input voltage does not exceed a certain voltage, the switch 2A is turned on. Therefore, the serial capacitance is increased, the potential division coefficient is increased, and the drop of the output voltage is prevented. Similarly, a compactor circuit 1C monitors the output voltage and when it exceeds a certain voltage, a switch 2C is turned on so that prattle capacitance is in creased, the potential division coefficient is lowered and the increase of the output voltage is suppressed. Thus, the settlement of the output voltage into the determined range is solved by a means of almost no loss and the circuit is reduced in weight.

Inventors

• 👤 Kokka O
• 👤 国華 王

Bibliographic Details