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Link regulator with feed forward switching control

  • US 4,458,199 A
  • Filed: 02/04/1982
  • Issued: 07/03/1984
  • Est. Priority Date: 02/04/1982
  • Status: Expired due to Fees
First Claim
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1. A method for controlling a switching regulator to convert an unregulated DC voltage level to a regulated DC voltage level, comprising:

  • generating a pulse waveform, each pulse therein turning a series switch on to conduct current from the unregulated DC voltage level;

    sensing the level of the unregulated DC voltage level on the input of the switch;

    generating an integrated voltage signal that is the integral of the sensed unregulated DC voltage level with respect to time;

    generating a threshold voltage;

    comparing the integrated voltage level with the threshold voltage and turning the switch off when the integrated voltage level exceeds the threshold voltage such that a constant volts/seconds signal is generated on the output of the switch;

    resetting the integrated voltage level to zero when the generated pulse waveform turns on the switch;

    filtering the output of the switch to provide the regulated DC voltage level, the regulated DC voltage level being proportional to the preset threshold voltage;

    andvarying the threshold voltage in response to variations in the regulated DC voltage level to maintain the DC voltage level constant.

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