Current control for SIMO converters

摘要

A system includes a single-inductor-multiple-out (SIMO) converter having storage circuitry in communication with a plurality of output channels, and a controller that controls and measures current flow through the SIMO converter. A signal generator may output switching signals to store current in the storage circuitry and discharge the stored current into the plurality of output channels. The discharged current may be measured and compared to a desired current draw through the output channels over a sample period. A compensator may determine whether to change one or more timing parameters used to control the flow of current through the SIMO converter.

主权项

1. A method of controlling current conduction in a single-inductor-multiple-output (SIMO) converter comprising storage circuitry in communication with a plurality of output channels, the method comprising:
measuring, with at least one first controller, current drawn through the plurality of output channels over a current sample period, wherein the current sample period extends over multiple switching cycles, and wherein each of the plurality of output channels is configured to draw current during each of the multiple switching cycles; determining, with at least one second controller, whether to change an amount of current being conducted in the SIMO converter for a next sample period based on a comparison between the measured current drawn over the current sample period and a predetermined current draw.