Patent US6541879B1 successfully refreshed from Google Patents.
US6541879B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
USB hub power management
Assignee: Cypress Semiconductor Corp
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Filing: 2001-03-23
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Granted: 2003-04-01
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Expires: 2021-03-23
Abstract
Abstract An apparatus including a controller, a voltage supply circuit and a power management circuit. The controller may include one or more ports. The voltage supply circuit may be configured to generate an unregulated voltage supply. The power management circuit may be configured to receive the unregulated voltage supply and present a regulated power supply voltage to each of the one or more ports. In one example, the apparatus may be implemented in a Universal Serial Bus (USB) hub.
Inventors
- 👤 David G. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:25
CPC Classifications
H; H02; H02J; H02J1/00; H02J1/10; H02J1/102
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
65 words
An apparatus comprising: a controller including a plurality of ports; a voltage supply circuit configured to generate an unregulated voltage supply; and a plurality of voltage regulators each configured (i) to receive said unregulated voltage supply, (ii) to present an independently regulated power supply voltage to a respective one of said plurality of ports and (iii) to provide automatic overcurrent protection to said respective port.
Claim 2
Independent Claim
65 words
An apparatus comprising: a controller including a plurality of ports; a voltage supply circuit configured to generate an unregulated voltage supply; and a plurality of voltage regulators each configured (i) to receive said unregulated voltage supply, (ii) to present an independently regulated power supply voltage to a respective one of said plurality of ports and (iii) to provide automatic overcurrent protection to said respective port.
Claim 3
Dependent Claim
33 words
The apparatus according to claim 1 , wherein each of said plurality of voltage regulators is configured to control the regulation of a downstream voltage and provide power management for said respective port.
Claim 4
Dependent Claim
38 words
The apparatus according to claim 1 , wherein each of said plurality of voltage regulators is configured to turn off automatically in response to an overcurrent condition in order to provide independent overcurrent protection to said respective port.
Claim 5
Dependent Claim
20 words
The apparatus according to claim 1 , wherein said apparatus is configured to manage power of said plurality of ports.
Claim 6
Dependent Claim
18 words
The apparatus according to claim 1 , wherein said plurality of voltage regulators further comprise a shutdown feature.
Claim 7
Dependent Claim
37 words
The apparatus according to claim 5 , wherein: said plurality of voltage regulators are independently shutdown in response to one or more control signals; and said controller is configured to generate said one or more control signals.
Claim 8
Dependent Claim
16 words
The apparatus according to claim 5 , wherein said plurality of voltage regulators are shutdown together.
Claim 9
Dependent Claim
34 words
The apparatus according to claim 1 , wherein said voltage supply circuit comprises: one or more diodes configured to receive an AC voltage supply; and a capacitor coupled to said one or more diodes.
Claim 10
Dependent Claim
15 words
The apparatus according to claim 1 , wherein said apparatus comprises a self-powered USB hub.
Claim 11
Dependent Claim
23 words
The apparatus according to claim 1 , wherein said power management circuit is configured to regulate power to one or more downstream devices.
Claim 12
Independent Claim
49 words
An apparatus comprising: means for receiving an unregulated voltage supply; and means for presenting a regulated power supply voltage to each of one or more ports of a controller in response to power supplied from said unregulated voltage supply, wherein each of said regulated supply voltages is independently regulated.
Claim 13
Independent Claim
49 words
An apparatus comprising: means for receiving an unregulated voltage supply; and means for presenting a regulated power supply voltage to each of one or more ports of a controller in response to power supplied from said unregulated voltage supply, wherein each of said regulated supply voltages is independently regulated.
Claim 14
Independent Claim
72 words
A method for providing power management to a plurality of ports of a controller, comprising the steps of: (A) receiving an unregulated voltage supply; (B) generating a regulated power supply voltage to each of said plurality of ports via a plurality of voltage regulators configured to (i) receive said unregulated voltage supply and (ii) turn off automatically in response to an overcurrent condition on a respective one of said plurality of ports.
Claim 15
Independent Claim
72 words
A method for providing power management to a plurality of ports of a controller, comprising the steps of: (A) receiving an unregulated voltage supply; (B) generating a regulated power supply voltage to each of said plurality of ports via a plurality of voltage regulators configured to (i) receive said unregulated voltage supply and (ii) turn off automatically in response to an overcurrent condition on a respective one of said plurality of ports.
Claim 16
Dependent Claim
39 words
The method according to claim 12 , wherein said plurality of voltage regulators are configured for: automatically turning off said regulated supply voltage to each of said plurality of ports in response to thermal effects of said overcurrent condition.
Claim 17
Dependent Claim
38 words
The method according to claim 12 , further comprising the step of: independently switching off each of said plurality of voltage regulators in response to a control signal from a respective one of said one or more ports.
Claim 18
Dependent Claim
39 words
The method according to claim 12 , further comprising the step of: detecting an overcurrent condition of each of said plurality of ports in response to a voltage level of a respective one of said independently regulated supply voltages.
Claim 19
Dependent Claim
34 words
The method according to claim 12 , further comprising the step of: switching said unregulated supply voltage to manage power to one or more down stream devices coupled to said one or more ports.
Claim 20
Dependent Claim
25 words
The method according to claim 12 , further comprising the step of: generating said unregulated voltage supply in response to an external AC voltage supply.
Claim 21
Dependent Claim
40 words
The apparatus according to claim 1 , wherein said controller is configured to detect an overcurrent condition of each of said plurality of ports in response to a voltage level of a respective one of said independently regulated supply voltages.
Claim 22
Dependent Claim
28 words
The apparatus according to claim 1 , wherein said voltage supply circuit is configured to generate said unregulated supply voltage in response to an external AC voltage supply.
Claim 23
Dependent Claim
36 words
The apparatus according to claim 1 , wherein: each of said one or more voltage regulators is configured to turn off said independently regulated power supply voltage in response to thermal effects of an overcurrent condition.
References Cited (Backward Citations)
US4419723A
Cited
US4626697A
Cited
US4675770A
Cited
US5514859A
Cited
US5475271A
Cited
US5483656A
Cited
US5603040A
Cited
US5522081A
Cited
US5467009A
Cited
US5606704A
Cited
US6009034A
Cited
US5818780A
Cited
US5675813A
Cited
US5787014A
Cited
US5799196A
Cited
US5938770A
Cited
US5884086A
Cited
US6064554A
Cited
US6000042A
Cited
US5952733A
Cited
US6094040A
Cited
US6072681A
Cited
US6240522B1
Cited
US6105097A
Cited
US6137188A
Cited
US6058026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2006-03-31 | 2006-09-30 | 2007-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-03-31 | 2010-09-30 | 2011-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-03-31 | 2014-09-30 | 2015-04-01 | $7700.00 | Window Closed / Lapsed |