DC-DC converter capable of performing for wide and dynamic voltage range
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United States of America Patent
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Mar 25, 2008
Grant Date -
Aug 9, 2007
app pub date -
Jan 25, 2007
filing date -
Feb 1, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
This patent specification describes a DC-DC converter which includes a switch configured to control an output voltage, a driver circuit configured to drive the switch, a flip-flop configured to control the driver circuit, an error amplifier configured to compare a feedback voltage of the output voltage with a reference voltage, a detector configured to sense an output current, a control voltage generator configured to generate a control voltage being ramped and a PWM comparator configured to compare the control voltage with an output voltage of the error amplifier and output a reset signal to the flip-flop. Ramping speed of the control voltage is changed in accordance with an external-control voltage input at an external-control terminal.
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