Over current detection circuits for motor driver
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United States of America Patent
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Nov 24, 2009
Grant Date -
Nov 13, 2008
app pub date -
Mar 30, 2007
filing date -
Mar 31, 2006
priority date (Note) -
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Abstract
of a pair of serially coupled transistors in the sensing circuit do not change with temperature, motor current, or voltage, and each includes a transistor receiving a reference current. The pair of level shifters each further includes a serially coupled diode and zener diode for preventing current from flowing from the differential output of the H-bridge to the level-shifting transistor.
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