Patent US5896284A successfully refreshed from Google Patents.
US5896284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching power supply apparatus with a return circuit that provides a return energy to a load
Assignee: Yutaka Electric Mfg Co Ltd
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Filing: 1996-08-06
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Granted: 1999-04-20
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Expires: 2016-08-06
Abstract
Abstract A switching power supply apparatus which effectively utilizes energy accumulated in a leak inductance of a circuit to enhance the efficiency. The switching power supply apparatus having a switch element on/off controlled by a driving signal generated from a driver circuit, wherein a first capacitor and a first diode are inserted in series between both terminals of the switch , and a second capacitor and a second diode are further connected in series between a connecting point of the first capacitor and the first diode and a grounding terminal of the switch element to use charges accumulated on the second capacitor as a voltage source.
Inventors
- 👤 Michihisa Murasato
- 👤 Mitsuru Kanno
- 👤 Sadaharu Tamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:51
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/32; H02M1/34; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H03; H03K; H03K17/00; H03K17/08; H03K17/081; H03K17/0814; H03K17/08142; H02M1/0083; H02M1/009; H02M1/346; H03K2217/00; H03K2217/0036; H03K2217/0081; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
180 words
A switching power supply apparatus comprising: switching means, having at least a first terminal and a second terminal, for switching a direct current (DC) voltage applied at said first terminal to generate a rectangular wave voltage at said second terminal; a flywheel diode having a first terminal connected to the second terminal of said switching means and a second terminal connected to a reference potential; a smoothing circuit for smoothing the rectangular wave voltage generated by said switching means; at least a first capacitor and a first diode connected in series between the first terminal of said flywheel diode and said reference potential, said first diode having a first terminal having the same polarity as that of the first terminal of said flywheel diode and a second terminal having the same polarity as that of the second terminal of said flywheel diode, the first terminal of said first diode being connected to said reference potential; and at least a second diode and a second capacitor, connected in series between the second terminal of said first diode and said reference potential.
Claim 2
Dependent Claim
180 words
A switching power supply apparatus comprising: switching means, having at least a first terminal and a second terminal, for switching a direct current (DC) voltage applied at said first terminal to generate a rectangular wave voltage at said second terminal; a flywheel diode having a first terminal connected to the second terminal of said switching means and a second terminal connected to a reference potential; a smoothing circuit for smoothing the rectangular wave voltage generated by said switching means; at least a first capacitor and a first diode connected in series between the first terminal of said flywheel diode and said reference potential, said first diode having a first terminal having the same polarity as that of the first terminal of said flywheel diode and a second terminal having the same polarity as that of the second terminal of said flywheel diode, the first terminal of said first diode being connected to said reference potential; and at least a second diode and a second capacitor, connected in series between the second terminal of said first diode and said reference potential.
Claim 3
Dependent Claim
24 words
A switching power supply apparatus according to claim 1, further comprising a resistor connected in series with said first capacitor and said first diode.
Claim 4
Dependent Claim
23 words
A switching power supply apparatus according to claim 1, wherein said switching power supply apparatus constitutes a buck chopper switching power supply circuit.
Claim 5
Dependent Claim
25 words
A switching power supply apparatus according to claim 1, further comprising voltage stabilizing means for stabilizing and outputting a voltage accumulated across said second capacitor.
Claim 6
Dependent Claim
43 words
A switching power supply apparatus according to claim 1, wherein the first terminal of said flywheel diode and of said first diode is a cathode terminal and the second terminal of said flywheel diode and of said first diode is an anode terminal.
Claim 7
Dependent Claim
27 words
A switching power supply apparatus according to claim 5, wherein a cathode terminal of said second diode is connected to said anode terminal of said first diode.
References Cited (Backward Citations)
US3736495A
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JPS53132732A
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JPS54114166A
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US4363067A
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JPH03178570A
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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) | 2002-04-19 | 2002-10-19 | 2003-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-19 | 2006-10-19 | 2007-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-19 | 2010-10-19 | 2011-04-20 | $7700.00 | Window Closed / Lapsed |