Switching regulator

Abstract

Abstract PURPOSE:To eliminate the necessity of newly providing a winding and to eliminate an auxiliary power source or a starting circuit by using the primary winding of a transformer also as a detecting winding. CONSTITUTION:The voltage of the primary winding of a transformer T1 is rectified by a diode D3, a capacitor C3 and a resistor R3 to obtain a voltage proportional to the output voltage at both ends of the resistor R3. Accordingly, a voltage which is proportional to the voltage at both ends of the resistor R3 is presented between the primary side ground and the terminal 1 of a controller A1 by the rotations of a transistor Q2 and resistors R2, R1. The voltage is compared by the controller A1 with a reference voltage, and the switching of the transistor Q1 is controlled by the output of the controller A1.

Inventors

• 👤 Tsutomu Ogawa
• 👤 勉 小川

Bibliographic Details