Power supply systems with controllable power
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United States of America Patent
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May 22, 2012
Grant Date -
Jun 9, 2011
app pub date -
Mar 5, 2010
filing date -
Mar 5, 2010
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A power supply system includes a power converter, a switch, and a controller. The power converter is operable for providing power to a load. The switch is coupled to the power converter and is operable for adjusting the power to the load. The switch has a gate, a source and a drain. The controller is coupled to the switch and is operable for controlling a state of the switch. The controller has a first control terminal for providing a gate voltage to the gate of the switch, a second control terminal for providing a source voltage to the source of the switch, and an input terminal for receiving a supply voltage via the source of the switch. The controller is also operable for limiting the supply voltage within a predetermined maximum level by regulating the gate voltage to a preset level.
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