Patents by Inventor Yuuki Sugisawa

Yuuki Sugisawa 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).

  • Patent number: 10411696
    Abstract: A power supply control device includes a first semiconductor switch and a second semiconductor switch, which are switched on if the voltage at the gate is at least an ON-threshold, and they are switched off if the voltage at the gate is less than an OFF-threshold. A resistor is connected between the source and the gate of the first semiconductor switch. A diode is connected between gates of the first semiconductor switch and the second semiconductor switch. A driving unit adjusts the voltage at the gate of the second semiconductor switch, switches on and off the first semiconductor switch and the second semiconductor switch, and controls the supply of power via the second semiconductor switch.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: September 10, 2019
    Assignees: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Yuuki Sugisawa
  • Patent number: 10411699
    Abstract: A power supply control device that includes a controller configured to switch on and off a first semiconductor switch and a plurality of second semiconductor switches whose current input terminals are connected to a current output terminal of the first semiconductor switch, the controller being configured to control supply of power via the plurality of second semiconductor switches by switching; a first parasitic diode connected between a current input terminal and the current output terminal of the first semiconductor switch; and a plurality of second parasitic diodes that are respectively connected between the current input terminals and current output terminals of the plurality of second semiconductor switches.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: September 10, 2019
    Assignees: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Yuuki Sugisawa
  • Patent number: 10396661
    Abstract: In a power supply control apparatus, when a semiconductor switch is switched ON, a charging circuit increases a base voltage. A first switch is ON if a differential voltage obtained by subtracting a gate voltage from a base voltage is at least a first reference voltage, and is OFF if the differential voltage is smaller than the first reference voltage. If the first switch is ON, a battery or a capacitor charges parasitic capacitors of the semiconductor switch.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: August 27, 2019
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Shunichi Sawano, Yuuki Sugisawa
  • Publication number: 20190260200
    Abstract: A power supply control apparatus includes: a semiconductor switching element switched with PWM control; a PWM signal output unit outputting a PWM signal; a current circuit outputting a current related to a current flowing through the semiconductor switching element; a filter circuit converting the current that is output from the current circuit to a voltage; an overcurrent protection circuit turning off the semiconductor switching element based on a voltage value of the voltage filtered by the filter circuit; a voltage detection unit detecting the voltage value of the voltage at a timing near an end of a pulse of a PWM signal; a temperature estimation unit estimating, a temperature of an electric wire through which a current flows that also flows through the semiconductor switching element; and an electric wire protection unit turning off the semiconductor switching element based on the temperature estimated by the temperature estimation unit.
    Type: Application
    Filed: January 13, 2017
    Publication date: August 22, 2019
    Applicants: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Shunichi Sawano, Yuuki Sugisawa, Kota Oda, Keisuke Mase
  • Publication number: 20190258284
    Abstract: A power supply control device includes a switch disposed in a first current path of a current flowing from a battery. A first comparator compares a voltage value of a current input end of the switch to which the current is inputted with a voltage threshold. When the voltage value of the current input end is less than the voltage threshold, a drive circuit turns off the switch. The battery supplies, via a second current path, power to a starter that starts an engine of a vehicle. The voltage threshold is less than the voltage value of the current input end of the switch in the case where the battery supplies the power to the starter.
    Type: Application
    Filed: February 15, 2019
    Publication date: August 22, 2019
    Inventors: Shunichi Sawano, Yuuki Sugisawa, Kota Oda
  • Publication number: 20190214982
    Abstract: If a main switch and a sub-switch are OFF and ON respectively, a comparator compares a source voltage value of the main switch to an output voltage value of a direct-current power source. In the same case, the comparator compares an end-to-end voltage value between a source and a drain of the main switch to a threshold value. A voltage value of the voltage applied to one end of the sub-switch is lower than the voltage value at the drain of the main switch. The output voltage value of the direct-current power source is lower than the voltage value. The threshold value is lower than the difference between the voltage value at the drain of the main switch and the voltage.
    Type: Application
    Filed: June 7, 2017
    Publication date: July 11, 2019
    Inventors: Shunichi SAWANO, Yuuki SUGISAWA
  • Patent number: 10326266
    Abstract: In an interrupting device, a CPU temporally calculates a temperature difference between an ambient temperature of an electrical wire and an electrical wire temperature, based on current information indicating a value of current flowing through the electrical wire, and adds the ambient temperature of the electrical wire to the calculated temperature difference. In this way, the CPU temporally computes the electrical wire temperature. In the case where the electrical wire temperature computed by the CPU is greater than or equal to a threshold temperature, a FET turns off and current flowing through the electrical wire is interrupted. The CPU suspends computation of the electrical wire temperature, in the case where the calculated temperature difference is less than a reference temperature difference and the current value indicated by the current information is less than a reference current value.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: June 18, 2019
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventor: Yuuki Sugisawa
  • Publication number: 20190181850
    Abstract: A power supply control device and a power supply control method capable of detecting a switch-related failure properly are provided. A power supply control device controls power supply via a switch. An output unit of a microcomputer produces a switching signal that instructs the switch to turn alternately on and off. A detection circuit reports a failure related to the switch if an accumulated period has reached or exceeded a threshold period. The accumulated period is accumulation of one or more periods when the switching signal instructs the switch to turn on but a comparator does not detect an on-state of the switch.
    Type: Application
    Filed: December 12, 2018
    Publication date: June 13, 2019
    Inventors: Shunichi Sawano, Yuuki Sugisawa
  • Publication number: 20190181751
    Abstract: In a power supply control apparatus, when a semiconductor switch is switched ON, a charging circuit increases a base voltage. A first switch is ON if a differential voltage obtained by subtracting a gate voltage from a base voltage is at least a first reference voltage, and is OFF if the differential voltage is smaller than the first reference voltage. If the first switch is ON, a battery or a capacitor charges parasitic capacitors of the semiconductor switch.
    Type: Application
    Filed: May 9, 2017
    Publication date: June 13, 2019
    Applicants: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Shunichi SAWANO, Yuuki SUGISAWA
  • Patent number: 10312695
    Abstract: Provided is a power source control device that realizes multi-channel PWM control without using a timer port, and a power source control method for the same. A power source control device performs PWM control on a plurality of power source units that repeat an ON operation and an OFF operation in cycles having a predetermined PWM period. The power source control device includes: a generation unit configured to generate operation data for the entire PWM period, the operation data determining whether to cause the individual power source units to perform the ON operation or the OFF operation in cycles having a predetermined period that is shorter than the PWM period; and an output unit configured to output operation data generated by the generation unit to the plurality of power source units in cycles of the predetermined period.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: June 4, 2019
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventor: Yuuki Sugisawa
  • Publication number: 20190165561
    Abstract: Provided is a power supply control apparatus, a power supply control method, and a computer program that can prevent an extremely large current from flowing via a switch. A power supply control apparatus is configured to control power supply via a switch. A control unit is configured to determine whether to switch ON a semiconductor switch. If the control unit determines to switch ON the switch, when a voltage value at a current input terminal of the switch, to which a current is input, is lower than a predetermined voltage value, a driving circuit is configured to switch ON the switch.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 30, 2019
    Inventors: Shunichi SAWANO, Yuuki SUGISAWA
  • Publication number: 20190123739
    Abstract: A power supply control device includes a first semiconductor switch and a second semiconductor switch, which are switched on if the voltage at the gate is at least an ON-threshold, and they are switched off if the voltage at the gate is less than an OFF-threshold. A resistor is connected between the source and the gate of the first semiconductor switch. A diode is connected between gates of the first semiconductor switch and the second semiconductor switch. A driving unit adjusts the voltage at the gate of the second semiconductor switch, switches on and off the first semiconductor switch and the second semiconductor switch, and controls the supply of power via the second semiconductor switch.
    Type: Application
    Filed: March 22, 2017
    Publication date: April 25, 2019
    Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Yuuki SUGISAWA
  • Publication number: 20190103867
    Abstract: A power supply control device that includes a controller configured to switch on and off a first semiconductor switch and a plurality of second semiconductor switches whose current input terminals are connected to a current output terminal of the first semiconductor switch, the controller being configured to control supply of power via the plurality of second semiconductor switches by switching; a first parasitic diode connected between a current input terminal and the current output terminal of the first semiconductor switch; and a plurality of second parasitic diodes that are respectively connected between the current input terminals and current output terminals of the plurality of second semiconductor switches.
    Type: Application
    Filed: March 21, 2017
    Publication date: April 4, 2019
    Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Yuuki SUGISAWA
  • Publication number: 20190086462
    Abstract: An in-vehicle determination has a current generation circuit and a comparison circuit. The current generation circuit is provided with a second resistance unit electrically connected on one end side to a second reference conduction path that is set to a second reference potential that is higher than a first reference potential of a first reference conduction path, and allows a current that depends on the current flowing through a first resistance unit to flow to the second resistance unit from the second reference conduction path side. The comparison circuit outputs a first signal in the case where the potential of the other end of the second resistance unit is smaller than a threshold potential that is generated with reference to the second reference potential, and outputs a second signal in the case where the potential of the other end of the second resistance unit is larger than the threshold potential.
    Type: Application
    Filed: June 11, 2018
    Publication date: March 21, 2019
    Inventor: Yuuki Sugisawa
  • Publication number: 20190058319
    Abstract: A power supply control apparatus that includes a switching circuit that turns ON or OFF a switch provided at a point along a wire, wherein power supply via the wire is controlled by switching with the switching circuit; a current output circuit configured to output a current whose current value increases as a current value of a current flowing through the wire increases; a resistance circuit through which the current that the current output circuit outputs flows, wherein the resistance circuit includes: a first resistor; and a series circuit of a second resistor and a capacitor that is connected in parallel to the first resistor; and a voltage applying circuit configured to, if an end-to-end voltage value across the resistance circuit becomes higher than or equal to a predetermined voltage value, apply a voltage whose value is higher than the predetermined voltage value.
    Type: Application
    Filed: March 9, 2017
    Publication date: February 21, 2019
    Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Shunichi SAWANO, Yuuki SUGISAWA
  • Publication number: 20180370464
    Abstract: A power supply control device that includes a switch control unit that is configured to switch on and off a first switch and a second switch and receive a supply of power from a battery, the first switch and the second switch being respectively provided in a plurality of power supply paths through which power is supplied from one end of a battery to one end of a first load and one end of a second load; an output terminal from which current that flows from the battery via the switch control unit is output; a diode whose anode is connected to the output terminal, and whose cathode is connected to one end of the second load; an opening detection circuit; and a voltage detection circuit.
    Type: Application
    Filed: January 11, 2017
    Publication date: December 27, 2018
    Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Yuuki SUGISAWA
  • Publication number: 20180358800
    Abstract: A control circuit turns ON or OFF a switch that is provided at a midpoint of a wire. Thus, power supply via the wire is controlled. A current output circuit outputs a current that corresponds to a current flowing through the wire to a resistance circuit. In the resistance circuit, a series circuit of a resistor (R2) and a capacitor (C1) is connected in parallel to a resistor (R1). The control circuit) turns OFF the switch if the end-to-end voltage value of a voltage across both ends of the resistance circuit is larger than or equal to a reference voltage value.
    Type: Application
    Filed: November 30, 2016
    Publication date: December 13, 2018
    Inventors: Shunichi Sawano, Yuuki Sugisawa, Kota Oda, Keisuke Mase
  • Publication number: 20180358806
    Abstract: In a power supply control apparatus, a control circuit adjusts a resistance between a drain and a source of a semiconductor transistor by adjusting the voltage at a gate of the semiconductor transistor. After the control circuit has lowered the resistance between the drain and the source, a control portion determines whether or not the voltage at the source detected by a voltage detecting portion is larger than or equal to a standard voltage. If the voltage at the source is larger than or equal to the standard voltage, the control circuit again lowers the resistance between the drain and the source. If the voltage at the source is smaller than the standard voltage, the control circuit adjusts the resistance between the drain and the source to a resistance at the time when determination was performed or larger.
    Type: Application
    Filed: December 21, 2016
    Publication date: December 13, 2018
    Inventors: Keisuke Mase, Yuuki Sugisawa, Kota Oda, Shunichi Sawano
  • Publication number: 20180351213
    Abstract: In a power supply control device, a microcomputer controls the supply of power from a battery to loads via a battery conductor by individually switching on and off switches. While power is being supplied from the battery to the microcomputer, current flows from the positive electrode of the battery to a battery terminal, the battery conductor, a diode, a resistor, a regulator, the microcomputer, an intermediate conductor, a fuse portion, a GND conductor, and a GND terminal in this order. If a current greater than or equal to a predetermined current flows to the fuse portion, the fuse portion breaks.
    Type: Application
    Filed: January 13, 2017
    Publication date: December 6, 2018
    Inventor: Yuuki Sugisawa
  • Publication number: 20180351346
    Abstract: A power supply control device prevents an electrical wire and a switch element from smoking. The power supply control device includes a switch element provided at a midpoint in an electrical wire that connects a power supply and a load. A current detection unit detects the current value of current flowing in the electrical wire. A temperature estimation unit estimates the wire temperature of the electrical wire based on the current value detected by the current detection unit. A control unit turns on or off the switch element based on the wire temperature estimated. The control unit estimates the smoking temperature of the switch element by changing the heat dissipation time constant of the electrical wire used in temperature calculation to a smaller value, and turns off the switch element if the wire temperature is greater than or equal to the estimated smoking temperature of the switch element.
    Type: Application
    Filed: November 30, 2016
    Publication date: December 6, 2018
    Inventors: Yuuki Sugisawa, Shunichi Sawano