US Patent No: 8,207,722
Number of patents in Portfolio can not be more than 2000
DC/DC converter
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Jun 26, 2012
Issued date -
Aug 25, 2009
filing date -
12/547,050
serial no -
In Force
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Abstract
A boost DC/DC converter has a voltage dividing circuit connected between the output terminal and the ground, that outputs a divided voltage obtained by dividing the output voltage; a reference voltage generating circuit that generates a reference voltage based on the input voltage; an error amplifier that outputs a first signal corresponding to the difference between the divided voltage and the reference voltage; a feedforward circuit that detects the input voltage and outputs a second signal corresponding to a current inversely proportional to the input voltage; a multiplier that multiples the first signal by the second signal and outputs a third signal obtained; and a control circuit that outputs, based on the third signal, a control signal for controlling on/off of the switching transistor so that the divided voltage is equal to the reference voltage.
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First Claim
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International Classification(s)
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Cited Art Landscape
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,949,229 Power factor correction circuit having an error signal multiplied by a current signal | 41 | 1997 | |
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| 2008/0122,422 Parallel Current Mode Control Using a Direct Duty Cycle Algorithm with Low Computational Requirements to Perform Power Factor Correction | 3 | 2007 | |
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| 5,708,356 Apparatus for supplying stabilized power to a load having voltage-current characteristics exhibiting partial negative resistance | 6 | 1996 | |
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| 2006/0043,942 Power converter apparatus and methods using output current feedforward control | 5 | 2005 | |
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