System to protect switch mode DC/DC converters against overload current

  • US 6,127,814 A
  • Filed: 11/23/1998
  • Issued: 10/03/2000
  • Est. Priority Date: 11/23/1998
  • Status: Expired due to Fees
First Claim
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1. A switch mode DC:

  • DC converter having an input node coupleable to a source of potential Vin and having an output node providing an output potential Vo and an output current, comprising;

    an inductor having a first inductor node and a second inductor node and an inherent resistance therebetween;

    a switch, having a control node, coupled to said converter so as to switchingly control current flow from said input node to said inductor; and

    means for sensing solely from DC signal components present at said first inductor node and at said second inductor node a measure of said output current and for outputting to said control node a signal proportional to said measure.

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