Short circuit current limit for open loop llc converter

Abstract

A short-circuit protection circuit for a resonant half-bridge circuit including a resonant capacitor coupled to a transformer winding of the resonant half-bridge circuit to detect a voltage indicative of a short circuit in the half-bridge circuit, the short-circuit protection circuitry including a sensing circuit coupled to the resonant capacitor to generate a triggering voltage in response to a voltage increase across the resonant capacitor due to a short circuit in the half-bridge circuit, and a controlling circuit coupled between a voltage input of the half-bridge circuit and the sensing circuit to shut down the half-bridge circuit when the triggering voltage is received in response to the short circuit in the half-bridge circuit.

Dependencies are inferred from the claim text.