Patents by Inventor Philip Anthony Murphy

Philip Anthony Murphy 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).

  • Led driver with ability to operate at arbitrarily low input voltages
    Patent number: 10999911
    Abstract: An LED driver with ability to operate at low input voltages is disclosed. The LED driver comprises a boost converter to boost an input voltage to a desired output voltage to power one or more LED strings. The boost converter incorporates a first controllable switch, such as a metal-oxide-semiconductor field-effect transistor (MOSFET), IGBT, etc., for output voltage control. The boost converter receives input from an external source, such as a battery voltage, as power source for voltage boost operation. The first controllable switch couples to a gate driver powered by a linear regulator, which switchably couples to different voltage sources via a second switch to ensure that the gate driver is able to provide enough voltage for switching the first controllable switch.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: May 4, 2021
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Philip Anthony Murphy
  • LED DRIVER WITH ABILITY TO OPERATE AT ARBITRARILY LOW INPUT VOLTAGES
    Publication number: 20200084846
    Abstract: An LED driver with ability to operate at low input voltages is disclosed. The LED driver comprises a boost converter to boost an input voltage to a desired output voltage to power one or more LED strings. The boost converter incorporates a first controllable switch, such as a metal-oxide-semiconductor field-effect transistor (MOSFET), IGBT, etc., for output voltage control. The boost converter receives input from an external source, such as a battery voltage, as power source for voltage boost operation. The first controllable switch couples to a gate driver powered by a linear regulator, which switchably couples to different voltage sources via a second switch to ensure that the gate driver is able to provide enough voltage for switching the first controllable switch.
    Type: Application
    Filed: August 2, 2019
    Publication date: March 12, 2020
    Applicant: Maxim Integrated Products, Inc.
    Inventor: Philip Anthony Murphy