Richtek Technology Corporation

Wei-Chuan Wu

Ta-Yung Yang

Chih-Hao Yang

Li-Wen Fang

Ping-Ching Huang

Hong-Wei Huang

Yu-Kai Lin

A control circuit for controlling a stackable multiphase power converter includes: a synchronization terminal; a synchronization signal connected to the synchronization terminals of a plurality of the control circuits in parallel, wherein the synchronization signal includes a plurality of pulses to be successively counted as a count number; and a reset signal, configured to reset and initiate the count number; wherein the control circuit further comprises a phase-sequence number, wherein the control circuit enables a corresponding power stage circuit to generate a phase of the output power when the count number reaches the phase-sequence number.

Control circuit and method for use in stackable multiphase power converter

A switching regulator having adjustable inductor current threshold employs a control method which includes: (S) determining whether an output voltage is greater than a reference voltage or determining whether a switching frequency of the power stage is smaller than a predetermined lower frequency limit, and (S) when it is determined yes in the step (S), adjusting the inductor current threshold, such that the switching regulator operates under a pseudo discontinuous conduction mode (PDCM) wherein the switching frequency is not smaller than the predetermined lower frequency limit. Consequently, when the switching regulator operates under a light load mode, an optimum balance between a total power consumption and switching noise interference will be ensured.

Switching regulator having adjustable inductor current threshold and control method thereof

Growing community of inventors

Changhua, Taiwan

Wei-Chuan Wu