Bootstrap startup and assist circuit
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United States of America Patent
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May 26, 2015
Grant Date -
Oct 18, 2012
app pub date -
Sep 10, 2010
filing date -
Sep 10, 2009
priority date (Note) -
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Abstract
A bootstrap assist circuit and a startup circuit comprising a voltage controlled switch and a startup ramp voltage generator connected to the voltage controlled switch that will control a high side switch, a dimming interface or an enable/disable input function. Said system is used to provide a bootstrap technique to continuously switch a floating high side switch (MOSFET) by continuously charging a capacitor and then “level shifting” said capacitor voltage across the gate and source of the said high side switch to turn the switch on.
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