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Noise resistant regulator including an encoded control signal

  • US 9,231,463 B2
  • Filed: 03/15/2013
  • Issued: 01/05/2016
  • Est. Priority Date: 08/06/2012
  • Status: Active Grant
First Claim
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1. A power supply comprising:

  • a non-isolated DC/DC converter supplying a regulated DC voltage to a load including;

    a power switch driven by a smart gate driver;

    a control loop carrying a load condition signal and a control signal; and

    a controller that generates the control signal responsive to the load condition signal;

    wherein;

    the controller is located on a first integrated circuit package;

    the smart gate driver is located on a second integrated circuit package;

    an analog to digital converter located on the second integrated circuit package;

    an encoder located on the first integrated circuit package, the encoder encoding the control signal and embedding a synchronization signal in the control signal, the synchronization signal providing a precise timing window for timing and sampling of the load condition signal; and

    a decoder located on the second integrated circuit package, the decoder decoding the control signal and providing the synchronization signal to the analog to digital converter; and

    the load condition signal is encoded on the second integrated circuit package in proximity to the load to reduce noise sensitivity on the control loop between the first and second integrated circuit packages,the encoded load condition signal is decoded by a second decoder on the first integrated circuit package prior to being passed to the controller.

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