Digital controller for switched capacitor DC-DC converter
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United States of America Patent
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May 28, 2019
Grant Date -
Jan 11, 2018
app pub date -
Sep 20, 2017
filing date -
Oct 27, 2011
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Abstract
Representative implementations of devices and techniques may minimize switching losses and voltage ripple in a switched capacitor de-de converter. A digital controller is used to control switching, based on an existing load. In some examples, the digital controller may insert a dead-time phase in a switching period, which may reduce voltage ripple for a low output load current. In other examples, the digital controller may adjust the conductance of a plurality of sub-switches, where the plurality of sub-switches may include one or more sub-switches that have a higher on-resistance than other sub-switches. For example, a sub-switch may have an on-resistance that is a multiple of the on-resistance of other sub-switches.
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