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Controller and a method for a DC converter, and also a DC converter

  • US 8,953,352 B2
  • Filed: 05/03/2011
  • Issued: 02/10/2015
  • Est. Priority Date: 05/06/2010
  • Status: Active Grant
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First Claim
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1. A DC converter comprising:

  • an input;

    an output;

    a ground connection;

    a first half-bridge, a first switch in said first half-bridge, a second switch connected in series following said first switch between said input and said ground connection, a first switch capacitor connected in parallel to said first switch, and a second switch capacitor connected in parallel to said second switch;

    a first inductor, said first inductor being electrically connected to a first half-bridge node point between said first and second switches, and said first inductor being electrically connected to said output;

    a second half-bridge in parallel to said first half-bridge, a third switch in said second half-bridge, a fourth switch connected in series following said third switch between said input and said ground connection, a third switch capacitor connected in parallel to said third switch, and a fourth switch capacitor connected in parallel to said fourth switch;

    a second inductor, said second inductor being electrically connected to a second half-bridge node point between said third and fourth switches, and said second inductor being electrically connected to said output;

    a capacitor connected between said output and said ground connection, and a second capacitor connected between said input and said ground connection;

    a controller connected to control said first half-bridge switch, said second half-bridge switch, said third half-bridge switch, and said fourth half-bridge switch;

    said controller electrically connected to obtain a first current measurement of current in said first inductor, said controller electrically connected to receive a second current measurement in said second inductor;

    said controller configured to switch said second half-bridge switch to an off-state when current in said first inductor is measured as flowing from said output towards said first inductor and measured as attaining a first specifiable threshold magnitude greater than zero, said controller configured to switch said fourth half-bridge switch to an off-state when current in said second inductor is measured as flowing from said output towards said second inductor and measured as attaining the first specifiable threshold magnitude;

    said controller configured to switch said first half-bridge switch to an off-state when current in said first inductor is measured as flowing from said first inductor towards said output and measured as attaining a second specifiable threshold magnitude greater than zero, said controller configured to switch said third half-bridge switch to an off-state when current in said second inductor is measured as flowing from said second inductor towards said output and measured as attaining the second specifiable threshold magnitude;

    said controller configured to set a first selectively adjustable time pause between switching-off of said first half-bridge switch and switching-on of said second half-bridge switch, said controller configured to set the first selectively adjustable time pause between switching-off of said third half-bridge switch and switching-on of said fourth half-bridge switch; and

    ,said controller configured to set a second selectively adjustable time pause between switching-off of said second half-bridge switch and switching-on of said first half-bridge switch, said controller configured to set the second selectively adjustable time pause between switching-off of said fourth half-bridge switch and switching-on of said third half-bridge switch.

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