DC/DC boost converter with resistorless current sensing
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United States of America Patent
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Aug 3, 2010
Grant Date -
Apr 2, 2009
app pub date -
Oct 1, 2007
filing date -
Oct 1, 2007
priority date (Note) -
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Abstract
A DC to DC boost converter circuit receives a DC input voltage and converts it to a DC output voltage at a different voltage level than the DC input voltage. The DC to DC boost converter includes a switching power converter for receiving the input voltage on an input and converting the input voltage to an output as the DC output voltage in response to pulse control signals. A switching controller generates the pulse control signals during a switching cycle. Current sensing circuitry limits a current passing through the switching power converter. The current sensing circuitry generates an overload signal when the current exceeds a reference value. The current sensing circuitry sensing the current with a current sensing resistor having a size of at least approximately 500 ohms.
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