Isolated switching power supply having volt-second clamping circuit

Abstract

An isolated switching-mode power supply with a volt-second clamp circuit is provided. A control circuitry for an isolated switching-mode power supply includes a transformer having a primary winding electrically connected to voltage supply terminals and a secondary winding for providing an output voltage, a volt-second clamp circuit electrically connected to the primary winding for controlling conduction and non-conduction states of the primary winding so as to achieve a maximum volt-second product limit of an input voltage at the primary winding, and a voltage feedback controller electrically connected to the volt-second clamp circuit for generating a feedback signal with reference to a magnitude of the output voltage and then modulating the volt-second product of the input voltage at the primary winding to stabilize the output voltage.

Dependencies are inferred from the claim text.