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Modulated power supply system and method with automatic transition between buck and boost modes

  • US 9,627,975 B2
  • Filed: 11/18/2013
  • Issued: 04/18/2017
  • Est. Priority Date: 11/16/2012
  • Status: Active Grant
First Claim
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1. A modulated power supply system comprising:

  • a switching converter configured to provide a switching voltage at an output terminal for supplying modulated power to a load; and

    a controller configured to perform steps to;

    determine if the modulated power supply system is operating in an average power tracking (APT) mode;

    operate the modulated power supply system in a buck mode if the APT mode is determined to be enabled;

    monitor a switching output voltage of the modulated power supply system to detect a signal indicative of a first predetermined condition corresponding to a drop below a regulated voltage level of the switching output voltage;

    automatically transition from the buck mode to a boost mode if the first predetermined condition exists for a predetermined time;

    monitor the switching output voltage of the modulated power supply system to detect a signal indicative of a second predetermined condition corresponding to a rise above the regulated voltage level of the switching output voltage;

    automatically transition from the boost mode to the buck mode if the second predetermined condition exists for the predetermined period; and

    repeat the steps until the controller determines that the APT mode is no longer enabled.

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