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Apparatus for limiting current through a plurality of parallel transistors

  • US 5,200,692 A
  • Filed: 09/23/1991
  • Issued: 04/06/1993
  • Est. Priority Date: 09/23/1991
  • Status: Expired due to Term
First Claim
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1. Apparatus for controlling current through a load, comprising:

  • a plurality of current control stages, each current control stage including first, second and third terminals, and means for conducting current between the first and second terminals in response to a control signal present at the third terminal;

    minimum circuit means, responsive to first and second input signals, for generating the minimum of the first and second input signals to thereby establish the control signal;

    sensing means for determining a value that is a function of the current flow through the load;

    feedback means, responsive to said sensing means, for generating the first input signal such that the first input signal is indicative of a desired level of current through the load; and

    limit circuit means for generating the second input signal, to thereby establish a maximum current flow through the current control stages.

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