Current trigger circuit and switching power converter using the same
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United States of America Patent
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Apr 16, 2013
Grant Date -
Sep 30, 2010
app pub date -
Mar 15, 2010
filing date -
Mar 26, 2009
priority date (Note) -
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Abstract
A bias voltage is compared with a voltage difference in a detecting element according to the present invention. A bias voltage unit is coupled to the detecting element, so that they have a common voltage level to avoid noises when the circuit is operating. Accordingly, the erroneous detection caused by the noise interference can be avoided. Hence, a detecting element with a low resistance, such as an MOEFET, can be used in the present invention to decrease power consumption arisen from current detection and to further increase conversion efficiency.
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