POWER SUPPLY APPARATUS WITH POWER FACTOR CORRECTION AND PULSE WIDTH MODULATION MECHANISM AND METHOD THEREOF
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United States of America Patent
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Issued Date -
Mar 6, 2014
app pub date -
Sep 6, 2013
filing date -
Sep 6, 2012
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Abandoned
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Abstract
A power supply apparatus that includes a pulse width modulation (PWM) based power conversion unit and a power factor correction (PFC) conversion unit is provided. The PWM-based power conversion unit is configured to receive a direct current (DC) input voltage and perform pulse width modulation on the received DC input voltage in response to a power supply request of a load, so as to generate a DC output voltage to the load. The PFC conversion unit is coupled to the PWM-based power conversion unit and configured to perform power factor correction on a rectification voltage associated with an alternating current (AC) input voltage, so as to generate the DC input voltage. The PFC conversion unit is further configured to adjust the generated DC input voltage in response to a variation of the load.
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