Digitally controlled non-inverting buck-boost DC-DC converter system
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United States of America Patent
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Sep 1, 2015
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Mar 20, 2014
app pub date -
Jan 9, 2013
filing date -
Sep 19, 2012
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Abstract
A digitally controlled non-inverting buck-boost DC-DC converter system including a non-inverting buck-boost DC-to-DC converter control module and a negative feedback module and applicable for a radio frequency circuit module is revealed. By locking a duty cycle to two specific levels, the non-inverting buck-boost DC-to-DC converter control module only needs a single operation mode to achieve the required effects. Simultaneously, pulse-skipping phenomenon is also avoided. Furthermore, a reference voltage is modified through a reference voltage correction circuit of the negative feedback module to eliminate errors between previous DC output voltage and the reference voltage. Thereby the DC output voltage can remain in a stable state so as to reduce operational defects during the mode transition.
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