US5282126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Start circuit for a switched mode power supply
Assignee: US Philips Corp
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Filing: 1992-08-03
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Granted: 1994-01-25
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Expires: 2012-08-03
Abstract
Abstract A circuit arrangement, which includes a switched-mode power supply energized by a source and which is controlled by a control circuit. The switched-mode power supply supplies the control circuit with energy during operation. The circuit also comprising a starter circuit for applying a supply current to the control circuit when the arrangement is put into operation. A particularly simple and inexpensive construction is obtained in that the starter circuit comprises a capacitive voltage divider which is fed directly by the source and is provided with a tapping wherefrom the supply current is derived via a rectifier element.
Inventors
- 👤 Theo Husgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:53
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/36; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02M1/0003; H02M1/0006; H02M1/0083; H02M1/009; Y; Y10; Y10S; Y10S323/00; Y10S323/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A circuit arrangement, comprising: a switched-mode power supply (SMPS) a source for feeding the SMPS and a control circuit for controlling the SMPS, which SMPS supplies the control circuit with energy during operation, and a starter circuit for applying a supply current to the control circuit when the circuit arrangement is put into operation, characterized in that the starter circuit comprises a capacitive voltage divider which is connected directly to the source and which comprises a tapping wherefrom the supply current is derived via a rectifier element.
Claim 2
Dependent Claim
87 words
A circuit arrangement, comprising: a switched-mode power supply (SMPS) a source for feeding the SMPS and a control circuit for controlling the SMPS, which SMPS supplies the control circuit with energy during operation, and a starter circuit for applying a supply current to the control circuit when the circuit arrangement is put into operation, characterized in that the starter circuit comprises a capacitive voltage divider which is connected directly to the source and which comprises a tapping wherefrom the supply current is derived via a rectifier element.
Claim 3
Dependent Claim
32 words
A circuit arrangement as claimed in claim 1, further comprising second rectifier element of a polarity opposing that of the source and connected between a terminal of the source and the tapping.
Claim 4
Dependent Claim
23 words
A circuit arrangement as claimed in claim 1 wherein the connection from the starter circuit to the control circuit comprises a limiting impedance.
Claim 5
Dependent Claim
50 words
A circuit arrangement as claimed in claim 2, wherein the SMPS comprises a boost regulator, including a series connection of an inductance and a switching element wherefrom, via a third rectifier element, a voltage is derived for feeding a load, the capacitive voltage divider being connected parallel to the load.
Claim 6
Dependent Claim
23 words
A circuit arrangement as claimed in claim 2, wherein the connection from the starter circuit to the control circuit comprises a limiting impedance.
Claim 7
Dependent Claim
50 words
A circuit arrangement as claimed in claim 1, wherein the SMPS comprises a boost regulator including a series connection of an inductance and a switching element wherefrom, via a second rectifier element, a voltage is derived for feeding a load, the capacitive voltage divider being connected parallel to the load.
Claim 8
Dependent Claim
50 words
A circuit arrangement as claimed in claim 5, wherein the SMPS comprises a boost regulator including a series connection of an inductance and a switching element wherefrom, via a third rectifier element, a voltage is derived for feeding a load, the capacitive voltage divider being connected parallel to the load.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-24 | 1997-07-26 | 1998-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-24 | 2001-07-26 | 2002-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-24 | 2005-07-26 | 2006-01-25 | $7700.00 | Window Closed / Lapsed |