Transformerless AC/DC converter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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N/A
Issued Date -
Feb 19, 2004
app pub date -
Mar 12, 2003
filing date -
Mar 12, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
AC/DC converters comprise rectifiers for rectifying AC signals into DC signals. By providing these AC/DC converters with voltage dividing capacitors located between converter-input, a resistor, added to voltage dividing capacitor for filtering peak signals, and a rectifier, the rectifier can be better integrated, as it no longer receives the entire input voltage present at the converter-input of the AC/DC converter, without a conventional transformer comprising an iron core and windings being required. Such an AC/DC-converter is small sized, of light-weight and low costly made. Preferably, the converter-input is symmetric, the rectifier comprises two diodes and two transistors and a zero-cross detector for switching the transistors, the AC/DC converter comprises a down-converter located between the rectifier and converter-output for further down-converting purposes and comprising an inductor and a regulator for regulating inductor/capacitor-energies, with buffer capacitors being present in parallel to the down-converter for stabilising purposes, to get a transformerless wall plug adapter.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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STMICROELECTRONICS N V | 1118 BH SCHIPHOL AIRPORT AMSTERDAM |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Van, Den Bossche Luc Jozef Louis | Lebbeke, BE | 1 | 33 |
# of filed Patents : 1 Total Citations : 33 |
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Patent Citation Ranking
- 33 Citation Count
- H02M Class
- 83.33 % this patent is cited more than
- 21 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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