Patents Assigned to Littelfuse, Inc.
  • Publication number: 20200203110
    Abstract: A fuse module including a mounting block having a through-hole extending therethrough, a fuse including an upper portion disposed on a top of the mounting block and having a through-hole, a lower portion disposed on a bottom of the mounting block and having a through-hole, and a fusible element disposed adjacent a sidewall of the mounting block and connecting the upper portion to the lower portion, the fuse module further including a housing having a main body portion encasing the mounting block and the fuse, the main body portion having apertures in top and bottom surfaces thereof aligned with the through-hole of the mounting block, and a cap portion connected to the main body portion and disposed over the fusible element, the cap portion having surface features extending from an interior surface thereof for absorbing energy upon occurrence of an overcurrent condition in the fuse.
    Type: Application
    Filed: November 21, 2019
    Publication date: June 25, 2020
    Applicant: Littelfuse, Inc.
    Inventors: Davide Mantoan, Massimiliano Tinto
  • Publication number: 20200194208
    Abstract: A fuse device including a fuse component, a first electrode, disposed on a first side of the fuse component, a second electrode, disposed on a second side of the fuse component, and a phase change component, disposed in thermal contact with the fuse component. The fuse component may comprise a fuse temperature, wherein the phase change component exhibits a phase change temperature, the phase change temperature marking a phase transition of the phase change component, and wherein the phase change temperature is less than the fuse temperature.
    Type: Application
    Filed: December 30, 2019
    Publication date: June 18, 2020
    Applicant: Littelfuse, Inc.
    Inventors: Chun-Kwan Tsang, Jianhua Chen
  • Patent number: 10685804
    Abstract: A method of making a fuse including inserting a fuse element into a cavity in a hollow fuse body, attaching a first end cap to the hollow fuse body and electrically connecting a first end of the fuse element to the first end cap, adding a mixture of particles including a melamine compound and a steatite of at least 2 times the melamine compound by weight—to the cavity such that the mixture of particles are disposed around the fuse element, and attaching a second end cap to the hollow fuse body and electrically connecting a second end of the fuse element to the second end cap.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: June 16, 2020
    Assignee: Littelfuse, Inc.
    Inventors: Roel Retardo, Albert Enriquez
  • Patent number: 10685766
    Abstract: A method for manufacturing an insulated conductive material, the method including providing a wire, applying a masking material to one or more regions of the wire, coating regions of the wire other than the one or more regions with an insulating material by, electrically charging the wire with a first charge polarity, providing a medium of electrically charged insulating material particles that are charged with an opposite polarity, passing the charged wire through the medium, whereby the insulating material particles bind areas of the conductive material other than the one or more regions, curing the insulating material particles, and applying a solvent to the masking material to thereby remove the masking material, wherein the cured insulated material particles are substantially unaffected by the solvent.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: June 16, 2020
    Assignee: LITTELFUSE, INC.
    Inventors: Jianhua Chen, Werner Johler, Chun-Kwan Tsang
  • Publication number: 20200185180
    Abstract: A fuse module including a mounting block formed of an electrically insulating material, the mounting block having a rear wall extending from a base, a fuse plate including an electrically conductive bus bar disposed adjacent a rear surface of the rear wall, a fusible element electrically connected to the bus bar and disposed adjacent a front surface of the rear wall, and a fuse terminal electrically connected to the fusible element and extending onto a top of the base. The fuse module may further include an electrically conductive terminal post extending from the top of the base through the fuse terminal for facilitating connection to an electrical component.
    Type: Application
    Filed: February 13, 2020
    Publication date: June 11, 2020
    Applicant: Littelfuse, Inc.
    Inventors: Julio Urrea, Gary Bold, Hector Perez, Matt Yurkanin, Alexander Conrad
  • Publication number: 20200182655
    Abstract: Embodiments herein are directed to steering position rotary sensors including a housing defining an internal cavity, a center shaft extending through the housing, and a gear coupled to the center shaft, wherein the gear is positioned off-center relative to a central rotational axis extending through the center shaft. The steering position rotary sensor may further include a magnet coupled to the gear, a first Hall effect sensor positioned adjacent the gear and concentric with the magnet, and a second Hall effect sensor positioned adjacent the center shaft and concentric with the central rotational axis, wherein the first Hall effect sensor and the second Hall effect sensor are separated by a magnetic shield.
    Type: Application
    Filed: December 10, 2018
    Publication date: June 11, 2020
    Applicant: Littelfuse, Inc.
    Inventor: Jay KRUGER
  • Patent number: 10679811
    Abstract: Provided herein is an improved bi-stable relay operable with a relay control circuit including a boost converter and an energy storage device, which is used to switch the bi-stable relay. In some embodiments, the bi-stable relay includes a solenoid wound with multiple coil windings. A conductive plate (e.g., a bus bar) may be coupled to a plunger of the solenoid, and is provided with contacts on each end of the conductive plate. The conductive plate is configured to electrically engage and disengage the solenoid upon respective application of power to the solenoid. The control circuit causes the solenoid to remain in an open position when selectively energized by a pulse for moving and retaining the conductive plate of the plunger against the solenoid for allowing wide operating voltage and reduced operating power.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: June 9, 2020
    Assignee: Littelfuse, Inc.
    Inventor: James Riley
  • Publication number: 20200172049
    Abstract: A radar-based occupancy detection system that includes a seatbelt buckle disposed adjacent a seat of a vehicle and a radar module disposed within the seatbelt buckle, the radar module including an antenna, a radio frequency (RF) transmitter, a RF receiver, and a processor, the antenna configured to broadcast a RF signal generated by the RF transmitter toward the seat, the processor configured to derive signal information from output received from the receiver and to characterize occupancy of the seat based on the signal information.
    Type: Application
    Filed: November 17, 2019
    Publication date: June 4, 2020
    Applicant: LITTELFUSE, INC.
    Inventors: Juergen Scheele, Efrem Fesshaie, Rimantas Misevicius
  • Publication number: 20200176367
    Abstract: A packaged semiconductor device has a thin profile, two face-to-face mounted power semiconductor device dice, and no internal bond wires. A first semiconductor device die is mounted so that a gate pad is bonded to the bottom of a first lead, and so that a source pad is bonded to the bottom of a second lead. A second semiconductor device die identical to the first is mounted so that a gate pad is bonded to the top of the first lead, and so that a source pad is bonded to the top of the second lead. The backside drain electrodes of both dice are electrically coupled to a third lead. The third lead in one example has a forked-shape, and the two dice are disposed entirely between the two tines of the fork. After encapsulation, the three leads extend parallel to each other from a body portion of the package.
    Type: Application
    Filed: February 6, 2020
    Publication date: June 4, 2020
    Applicant: Littelfuse, Inc.
    Inventor: Nathan Zommer
  • Patent number: 10672691
    Abstract: A packaged semiconductor device has a thin profile, two face-to-face mounted power semiconductor device dice, and no internal bond wires. A first semiconductor device die is mounted so that a gate pad is bonded to the bottom of a first lead, and so that a source pad is bonded to the bottom of a second lead. A second semiconductor device die identical to the first is mounted so that a gate pad is bonded to the top of the first lead, and so that a source pad is bonded to the top of the second lead. The backside drain electrodes of both dice are electrically coupled to a third lead. The third lead in one example has a forked-shape, and the two dice are disposed entirely between the two tines of the fork. After encapsulation, the three leads extend parallel to each other from a body portion of the package.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: June 2, 2020
    Assignee: Littelfuse, Inc.
    Inventor: Nathan Zommer
  • Publication number: 20200161068
    Abstract: A method of assembly of an open-cavity, wire-in-air fuse which provides improved manufacturing yield and fuse reliability, involving coiling, braiding or twisting a fusible element around a sacrificial member during the manufacturing process to provide support for the fusible element to prevent mechanical breakages and necking problems commonly encountered during manufacture.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 21, 2020
    Applicant: Littelfuse, Inc.
    Inventors: Albert Enriquez, Victor Oliver Tabell, Lily Rosios
  • Patent number: 10636599
    Abstract: A wireless relay may include a housing; an output, disposed within the housing; and a wireless interface, disposed within the housing, wherein the wireless interface is to receive wireless communication signals including settings to configure one or more functionalities associated with the wireless relay.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: April 28, 2020
    Assignee: Littelfuse, Inc.
    Inventor: Kip M. Larson
  • Patent number: 10634736
    Abstract: A method for forming a magnetoresistive sensor. The method may include dissolving a substrate, the substrate comprising plated nanowires, wherein a dissolved substrate is formed. The method may further include forming an intermediate mixture from the dissolved substrate, and forming pre-bundled nanowires from the intermediate mixture.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: April 28, 2020
    Assignee: Littelfuse, Inc.
    Inventors: Yuriy B. Matus, Martin G. Pineda
  • Patent number: 10629336
    Abstract: An electronic device including a protected component, a flexible positive temperature coefficient (PTC) device including a flexible sheet of PTC material coupled to a surface of the protected component, the flexible PTC device electrically connected to the protected component and adapted to arrest or mitigate electrical current flowing through the protected component upon the occurrence of an overcurrent condition, and a battery management system coupled to the flexible PTC device, the battery management system configured to measure a voltage across the flexible PTC device and to arrest or mitigate electrical current in the electronic device if the measured voltage across the flexible PTC device exceeds a predetermined threshold.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: April 21, 2020
    Assignee: Littelfuse, Inc.
    Inventor: Boris Golubovic
  • Publication number: 20200112309
    Abstract: A latching relay includes a supply terminal, a load terminal, first and second coupling circuits, a latch circuit, first and second transistors, and a local supply node coupled to a capacitor. In one example, the supply terminal is coupled to a supply node and the load terminal is coupled to the load. The first and second transistors control the conductivity of a drive transistor coupled to the load. A microcontroller controls the latching relay to switch the load on and off. To enable the load, the microcontroller sinks current from the supply terminal and through the first coupling circuit. While the load is enabled, the capacitor is discharged. The latching relay is operable in a refresh mode in which current is pulsed through the first coupling circuit causing capacitor to be re-charged from the supply terminal. To disable the load, the microcontroller sinks current through the second coupling circuit.
    Type: Application
    Filed: December 6, 2019
    Publication date: April 9, 2020
    Applicant: Littelfuse, Inc.
    Inventors: Michael J. Gambuzza, Eirik L. Gude
  • Patent number: 10615669
    Abstract: A protection device may include a resistor, the resistor including a first end for coupling between a load and a second end for coupling to a DC source. The protection device may also include a capacitor having a first terminal coupled between the second end of the resistor and the DC source, and a second terminal coupled to ground, the capacitor further comprising a capacitor body, wherein the capacitor body comprises a ferroelectric material.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: April 7, 2020
    Assignee: Littelfuse, Inc.
    Inventors: Yuriy B. Matus, Kedar Bhatawadekar, Martin Pineda, Werner Johler
  • Publication number: 20200103251
    Abstract: A linear positioning system including a pair of magnets disposed adjacent one another and defining a gap therebetween, the magnets having common poles facing one another, and first, second, and third magnetic sensors disposed within a housing and oriented orthogonally with respect to one another for detecting linear motion along X, Z, and Y axes of a Cartesian coordinate system, respectively, the housing being movable along an axis passing through the gap.
    Type: Application
    Filed: September 27, 2019
    Publication date: April 2, 2020
    Applicant: Littelfuse, Inc.
    Inventors: Seong-Jae Lee, Stephen E. Knapp
  • Patent number: 10600601
    Abstract: A fuse including a housing having upper and lower portions, a plurality of terminal portions disposed in the lower portion, each of said terminal portions having first and second prongs and a gap therebetween, the gap narrowing from a first width adjacent an upper end of said first and second prongs to a second width adjacent a lower end of said first and second prongs, a fusible link disposed in the upper portion of the housing between said plurality of terminal portions, and a partition in said lower portion of said housing, wherein a distance between each of the second prongs and the partition increases from a first end of each of the second prongs proximate the upper portion to a second end of each of the second prongs distal from the upper portion for allowing the second ends to be displaced toward the partition before engaging the partition.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: March 24, 2020
    Assignee: Littelfuse, Inc.
    Inventors: Seibang Oh, Julio Urrea, James J. Beckert
  • Publication number: 20200075284
    Abstract: A disc fuse including an electrically insulating substrate having a via formed therethrough extending between a first surface and a second surface of the substrate, an electrically conductive first terminal disposed on the first surface of the substrate, and an electrically conductive second terminal disposed on the second surface of the substrate, the second terminal including an outer portion having an inner edge defining a through-hole in the second terminal, the second terminal further including a fuse portion extending from the inner edge, the fuse portion comprising a fusible element terminating in a contact pad, wherein the substrate provides an electrically insulating barrier between the first terminal and the second terminal and wherein the via provides an electrical connection between the first terminal and the contact pad.
    Type: Application
    Filed: November 10, 2019
    Publication date: March 5, 2020
    Applicant: Littelfuse, Inc.
    Inventors: Maria Lily E. Rosios, Albert Enriquez, Todd Dietsch, Werner Johler
  • Patent number: 10573480
    Abstract: A disc fuse including an electrically insulating substrate having a via formed therethrough extending between a first surface and a second surface of the substrate, an electrically conductive first terminal disposed on the first surface of the substrate, and an electrically conductive second terminal disposed on the second surface of the substrate, the second terminal including an outer portion having an inner edge defining a through-hole in the second terminal, the second terminal further including a fuse portion extending from the inner edge, the fuse portion comprising a fusible element terminating in a contact pad, wherein the substrate provides an electrically insulating barrier between the first terminal and the second terminal and wherein the via provides an electrical connection between the first terminal and the contact pad.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: February 25, 2020
    Assignee: LITTELFUSE, INC.
    Inventors: Maria Lily E. Rosios, Albert Enriquez, Todd Dietsch, Werner Johler