SWITCHED MODE POWER SUPPLY PEAK-EFFICIENCY DETECTION

摘要

A peak efficiency detection system may include a switched power supply (SPS) module providing an output supply signal. The SPS module may have an internal node, and a plurality of SPS circuits configured to generate the output supply signal on the internal node. A dead type module may generate control signals. A central node external to the SPS module may deliver the output supply signal to a load module. A power stage size control module may generate control signals for controlling the SPS module. A peak-efficiency detection (PED) module may receive the output supply signal from the central node, the control signals from the SPS module, and the control signals from the power stage size control module. The PED module may generate a signal representative of an efficiency of the SPS module.

主权项

1. An electronic device comprising:
a switched power supply module comprising a plurality of switched power supply circuits configured to generate an output supply signal; and a peak efficiency detection module configured to receive the output supply signal and, based thereupon, generate an efficiency signal representative of an efficiency of the switched power supply module; wherein the efficiency signal being lower than a threshold value indicates that switching losses of the switched power supply module are greater than ohmic losses thereof, and wherein the efficiency signal being higher than the threshold value indicates that the ohmic losses of the switched power supply module are greater than the switching losses thereof; the switched power supply configured to switch at least one of the plurality of switched power supply circuits between an activated state and a deactivated state based upon the efficiency signal.