Method and apparatus to reduce dynamic Rdson in a power switching circuit having a III-nitride device
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United States of America Patent
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May 24, 2011
Grant Date -
Oct 16, 2008
app pub date -
Apr 9, 2008
filing date -
Apr 11, 2007
priority date (Note) -
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Abstract
A method of preventing the Rdson of a III-V Nitride power switching circuit from varying over time. The method includes biasing the switch to a pre-bias voltage level just below turn ON when the switch is OFF, wherein traps are discharged when the switch is biased to the pre-bias voltage level just below turn ON and the varying of the Rdson over time due to traps is reduced. The method can be employed in DC-DC converter circuits having III-V Nitride control and synchronous switches connected at a switching node.
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