Patent ID: 7923865
Filing Date: 2011-04-12
Classification: A61N,G11C,H02M

Abstract:
1. A dc-dc voltage conversion device comprising: an input node to receive a dc input voltage at an input level; an output node to output a dc output voltage at an output level; a first pump capacitor and a second pump capacitor; switches configured to selectively arrange only the first and second pump capacitors in different subcircuits relative to the input node and the output node; and a controller configured to control the switches to transition between a first number of phases comprising a first set of the subcircuits in a first conversion mode comprising a first conversion ratio, and between a second number of phases comprising a second set of subcircuits in a second conversion mode comprising a second conversion ratio, to convert the input voltage to the output voltage, wherein the first number of phases is at least three, the output level is different from the input level, and the first conversion ratio is different than the second conversion ratio, and wherein the first conversion ratio comprises a ratio of the output level to the input level and comprises at least one of 83%, 80%, 60%, 40%, 20%, or 17%.