US Patent No: 7,719,137
Number of patents in Portfolio can not be more than 2000
DC-DC switching converter device
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May 18, 2010
Issued date -
Mar 10, 2004
filing date -
10/548,393
serial no -
In Force
status
Importance
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Abstract
A DC-DC switching converter device (101), in particular a quarter-brick or eighth-brick device having an industry standard pin out, comprises a pulse-width modulation circuit (132) for driving a power converting switch, a trim connector (109) for adjusting an output voltage of the device, where the device (101) is designed such that the pulse-width modulation circuit (132) is synchronizable to an external oscillator by an external synchronization signal applied to the trim connector. A DC-DC converting circuit comprises a plurality of DC-DC switching converters (101) featuring trim connectors (109) for adjusting output voltages of the converters (101), whereby the converters (101) are connected such that they share a common input bus. It further features a system EMI (electromagnetic interference) filter common to all the DC-DC switching converters (101) and an external oscillator delivering an external synchronization signal to the plurality of DC-DC switching converters (101). The external oscillator is designed such that a frequency of the external synchronization signal is higher than a free running frequency of each of the plurality of DC-DC switching converters (101). The external oscillator is connected to the trim connectors (109) of the DC-DC switching converters (101).
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,821,826 Oscillator circuit synchronization | 3 | 1996 | |
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| 6,201,723 Simplified current share circuit | 5 | 1999 | |
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| 7,002,266 Active DC output control and method for DC/DC converter | 7 | 2002 | |
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| 5,045,712 Synchronized switched mode power supplies | 24 | 1986 | |
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| 5,724,237 Apparatus and method for sharing a load current among frequency-controlled D.C.-to-D.C. converters | 28 | 1996 | |
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| 5,691,889 Controller having feed-forward and synchronization features | 20 | 1995 | |
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| 4,496,801 Splicing module test set | 5 | 1982 | |
Patent Citation Ranking
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