Patent ID: 11349383

Abstract:
A fault protection method used in a multiphase switching converter which includes a plurality of switching circuits coupled in parallel and a plurality of control circuits configured in a daisy chain. Each control circuit has a first terminal coupled to a phase control signal, a second terminal coupled to a previous control circuit in the daisy chain to receive a phase input signal, and a third terminal coupled to a latter control circuit in the daisy chain to provide a phase output signal. The fault protection method includes: configuring a first control circuit as a master control circuit to provide the phase control signal; respectively configuring the rest of the control circuits as a slave control circuit to receive the phase control signal; if a fault condition is detected in the first control circuit, changing the first control circuit into a slave control circuit and generating a second pulse on the phase output signal of the first control circuit; and if a second pulse is detected on a phase input signal of a second control circuit, changing the second control circuit into a master control circuit.