Patents by Inventor Mark Tomas

Mark Tomas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fault tolerant power supply incorporating intelligent load switch to provide uninterrupted power
    Patent number: 9846469
    Abstract: A fault tolerant power supply system includes at least one load switch circuit configured to connect, using a main switch, an input voltage to an output node of the load switch circuit when the load switch circuit is turned on and at least one power channel coupled to the load switch circuit to receive the input voltage. The power channel is configured as a buck converter and includes at least a high-side power switch and a low-side power switch. The fault tolerant power supply system is configured to measure a current flowing through the main switch of the load switch circuit, to determine that the current flowing through the main switch of the load switch circuit has exceeded a current limit threshold, and to disable the main switch of the load switch circuit and the low-side power switch of the power channel in response to the determination that the current flowing in the main switch has exceeded the current limit threshold.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: December 19, 2017
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Mark Tomas, Zhiye Zhang, Allen Chang, Kuang Ming Chang, Gilbert Lee, Son Tran
  • Fault tolerant power supply incorporating intelligent gate driver-switch circuit to provide uninterrupted power
    Patent number: 9705395
    Abstract: A fault tolerant power supply system includes at least one load switch configured to connect an input voltage to an output node of the load switch when the load switch is turned on and at least one power channel coupled to the load switch to receive the input voltage. The power channel is configured as a buck converter and includes at least a high-side power switch and a low-side power switch. The fault tolerant power supply system is configured to measure a current flowing through the low-side power switch, to determine that the current flowing through the low-side power switch has exceeded a current limit threshold, and to disable the low-side power switch and the load switch in response to the determination that the current flowing in the low-side power switch has exceeded the current limit threshold.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: July 11, 2017
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Mark Tomas, Zhiye Zhang, Allen Chang, Kuang Ming Chang, Gilbert Lee
  • FAULT TOLERANT POWER SUPPLY INCORPORATING INTELLIGENT LOAD SWITCH TO PROVIDE UNINTERRUPTED POWER
    Publication number: 20160259390
    Abstract: A fault tolerant power supply system includes at least one load switch circuit configured to connect, using a main switch, an input voltage to an output node of the load switch circuit when the load switch circuit is turned on and at least one power channel coupled to the load switch circuit to receive the input voltage. The power channel is configured as a buck converter and includes at least a high-side power switch and a low-side power switch. The fault tolerant power supply system is configured to measure a current flowing through the main switch of the load switch circuit, to determine that the current flowing through the main switch of the load switch circuit has exceeded a current limit threshold, and to disable the main switch of the load switch circuit and the low-side power switch of the power channel in response to the determination that the current flowing in the main switch has exceeded the current limit threshold.
    Type: Application
    Filed: May 16, 2016
    Publication date: September 8, 2016
    Inventors: Mark Tomas, Zhiye Zhang, Allen Chang, Kuang Ming Chang, Gilbert Lee, Son Tran
  • Fault tolerant power supply incorporating intelligent load switch to provide uninterrupted power
    Patent number: 9367111
    Abstract: A fault tolerant power supply system includes at least one load switch circuit configured to connect, using a main switch, an input voltage to an output node of the load switch circuit when the load switch circuit is turned on and at least one power channel coupled to the load switch circuit to receive the input voltage. The power channel is configured as a buck converter and includes at least a high-side power switch and a low-side power switch. The fault tolerant power supply system is configured to measure a current flowing through the main switch of the load switch circuit, to determine that the current flowing through the main switch of the load switch circuit has exceeded a current limit threshold, and to disable the main switch of the load switch circuit and the low-side power switch of the power channel in response to the determination that the current flowing in the main switch has exceeded the current limit threshold.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: June 14, 2016
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Mark Tomas, Zhiye Zhang, Allen Chang, Kuang Ming Chang, Gilbert Lee, Son Tran
  • FAULT TOLERANT POWER SUPPLY INCORPORATING INTELLIGENT GATE DRIVER-SWITCH CIRCUIT TO PROVIDE UNINTERRUPTED POWER
    Publication number: 20150311780
    Abstract: A fault tolerant power supply system includes at least one load switch configured to connect an input voltage to an output node of the load switch when the load switch is turned on and at least one power channel coupled to the load switch to receive the input voltage. The power channel is configured as a buck converter and includes at least a high-side power switch and a low-side power switch. The fault tolerant power supply system is configured to measure a current flowing through the low-side power switch, to determine that the current flowing through the low-side power switch has exceeded a current limit threshold, and to disable the low-side power switch and the load switch in response to the determination that the current flowing in the low-side power switch has exceeded the current limit threshold.
    Type: Application
    Filed: July 7, 2015
    Publication date: October 29, 2015
    Inventors: Mark Tomas, Zhiye Zhang, Allen Chang, Kuang Ming Chang, Gilbert Lee
  • Fault tolerant power supply incorporating intelligent gate driver-switch circuit to provide uninterrupted power
    Patent number: 9106075
    Abstract: A fault tolerant power supply system includes at least one load switch configured to connect an input voltage to an output node of the load switch when the load switch is turned on and at least one power channel coupled to the load switch to receive the input voltage. The power channel is configured as a buck converter and includes at least a high-side power switch and a low-side power switch. The fault tolerant power supply system is configured to measure a current flowing through the low-side power switch, to determine that the current flowing through the low-side power switch has exceeded a current limit threshold, and to disable the low-side power switch and the load switch in response to the determination that the current flowing in the low-side power switch has exceeded the current limit threshold.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: August 11, 2015
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Mark Tomas, Zhiye Zhang, Allen Chang, Kuang Ming Chang, Gilbert Lee
  • FAULT TOLERANT POWER SUPPLY INCORPORATING INTELLIGENT LOAD SWITCH TO PROVIDE UNINTERRUPTED POWER
    Publication number: 20140277802
    Abstract: A fault tolerant power supply system includes at least one load switch circuit configured to connect, using a main switch, an input voltage to an output node of the load switch circuit when the load switch circuit is turned on and at least one power channel coupled to the load switch circuit to receive the input voltage. The power channel is configured as a buck converter and includes at least a high-side power switch and a low-side power switch. The fault tolerant power supply system is configured to measure a current flowing through the main switch of the load switch circuit, to determine that the current flowing through the main switch of the load switch circuit has exceeded a current limit threshold, and to disable the main switch of the load switch circuit and the low-side power switch of the power channel in response to the determination that the current flowing in the main switch has exceeded the current limit threshold.
    Type: Application
    Filed: July 24, 2013
    Publication date: September 18, 2014
    Applicant: Alpha and Omega Semiconductor Incorporated
    Inventors: Mark Tomas, Zhiye Zhang, Allen Chang, Kuang Ming Chang, Gilbert Lee, Son Tran
  • FAULT TOLERANT POWER SUPPLY INCORPORATING INTELLIGENT GATE DRIVER-SWITCH CIRCUIT TO PROVIDE UNINTERRUPTED POWER
    Publication number: 20140268939
    Abstract: A fault tolerant power supply system includes at least one load switch configured to connect an input voltage to an output node of the load switch when the load switch is turned on and at least one power channel coupled to the load switch to receive the input voltage. The power channel is configured as a buck converter and includes at least a high-side power switch and a low-side power switch. The fault tolerant power supply system is configured to measure a current flowing through the low-side power switch, to determine that the current flowing through the low-side power switch has exceeded a current limit threshold, and to disable the low-side power switch and the load switch in response to the determination that the current flowing in the low-side power switch has exceeded the current limit threshold.
    Type: Application
    Filed: July 24, 2013
    Publication date: September 18, 2014
    Applicant: Alpha and Omega Semiconductor Incorporated
    Inventors: Mark Tomas, Zhiye Zhang, Allen Chang, Kuang Ming Chang, Gilbert Lee