Patents by Inventor Deepa Mathai

Deepa Mathai 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).

  • Method and device for short-circuit detection by saturation detection in power semiconductor switches
    Patent number: 11942927
    Abstract: The present invention relates to a method for short-circuit detection by saturation detection in power semiconductor switches and to a corresponding device. A reference voltage (Uref) is provided as a function of a supply voltage (UVDD) of a power semiconductor switch. A differential voltage (Udiff) is generated from the difference of a voltage drop (U?) of a load path of the power semiconductor switch and the provided reference voltage (Uref). The generated differential voltage (Udiff) is compared with a predetermined threshold voltage (Ulim). A short-circuit current in the load path of the power semiconductor switch is detected when the differential voltage (Udiff) exceeds the threshold voltage (Ulim). In this case, the power semiconductor switch is opened.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: March 26, 2024
    Assignee: Robert Bosch GmbH
    Inventors: Calin Purcarea, Daniel Schweiker, Deepa Mathai, Falko Friese
  • METHOD AND DEVICE FOR SHORT-CIRCUIT DETECTION BY SATURATION DETECTION IN POWER SEMICONDUCTOR SWITCHES
    Publication number: 20220294441
    Abstract: The present invention relates to a method for short-circuit detection by saturation detection in power semiconductor switches and to a corresponding device. A reference voltage (Uref) is provided as a function of a supply voltage (UVDD) of a power semiconductor switch. A differential voltage (Udiff) is generated from the difference of a voltage drop (U?) of a load path of the power semiconductor switch and the provided reference voltage (Uref). The generated differential voltage (Udiff) is compared with a predetermined threshold voltage (Ulim). A short-circuit current in the load path of the power semiconductor switch is detected when the differential voltage (Udiff) exceeds the threshold voltage (Ulim). In this case, the power semiconductor switch is opened.
    Type: Application
    Filed: August 13, 2020
    Publication date: September 15, 2022
    Inventors: Calin Purcarea, Daniel Schweiker, Deepa Mathai, Falko Friese