Invalidity dossier
US 9510401
Reduced standby power in an electronic power control system
Current assignee: Cirrus Logic Inc
Added 9/23/2026, 6:11:06 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 9,510,401 B1
Title: Reduced standby power in an electronic power control system
Patent number: US 9,510,401 B1
Application number: US 13/217,115
Assignee: Cirrus Logic Inc. (original assignee and current assignee as listed)
Inventors: Michael A. Kost; Karl Thompson
Key dates (as listed): Priority date 2010-08-24 (a stated assumption, not a legal conclusion); filing date 2011-08-24; publication/grant date 2016-11-29; legal status Active, with an adjusted expiration listed as 2033-08-19.
Purpose: The invention relates generally to electronics and more specifically to a method and system for reducing standby power in an electronic power control system. In standby mode, a controller stops generating a control switch signal and so minimizes power usage, but it still draws power to monitor sense signals for input voltage and link voltage, and sense currents continue to flow — causing additional energy usage during standby. The described approach addresses that residual standby consumption.
Plain-language scope: In the described method, during standby mode of a switching power converter controller, sensing of the input voltage is at least intermittently disabled while the link voltage is sensed at least intermittently. When the sensed link voltage indicates a predetermined power demand by a load coupled to the converter, the controller exits standby mode and enables input voltage sensing. During standby mode, the controller ceases generating the control switch signal that governs power conversion. The disclosure is described in the context of a boost-type switching power converter with a full bridge rectifier, link capacitor, and FET switch, controlled via pulse width modulation, with power factor correction, and loads such as LED and gas discharge lamps, cellular telephones, computing devices, personal digital assistants, and power supplies.
Source: https://patents.google.com/patent/US9510401/en
What the excerpt does not establish: The excerpt is partial. It does not provide the full claims, complete specification, drawing descriptions, or a full list of references cited. It does not establish litigation history, ownership transfers beyond the listed assignments, validity, or the state of prior art. Google Patents notes that legal status, assignee, and priority date are assumptions, not legal conclusions. Classifications noted include H02M1/42 and various H05B45/xx entries.
Generated 10/1/2026, 9:42:59 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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