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WO2025181069A1 - Appareil de commutation électronique pour commander des charges dans un véhicule automobile - Google Patents

Appareil de commutation électronique pour commander des charges dans un véhicule automobile

Info

Publication number
WO2025181069A1
WO2025181069A1 PCT/EP2025/055020 EP2025055020W WO2025181069A1 WO 2025181069 A1 WO2025181069 A1 WO 2025181069A1 EP 2025055020 W EP2025055020 W EP 2025055020W WO 2025181069 A1 WO2025181069 A1 WO 2025181069A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
switching device
transistor
designed
switched
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2025/055020
Other languages
German (de)
English (en)
Inventor
Ralf Abel
André Sudhaus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elmos Semiconductor SE
Original Assignee
Elmos Semiconductor SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Elmos Semiconductor SE filed Critical Elmos Semiconductor SE
Publication of WO2025181069A1 publication Critical patent/WO2025181069A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/12—Modifications for increasing the maximum permissible switched current
    • H03K17/122—Modifications for increasing the maximum permissible switched current in field-effect transistor switches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for DC mains or DC distribution networks
    • H02J1/06—Two-wire systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/18—Modifications for indicating state of switch
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/0027—Measuring means of, e.g. currents through or voltages across the switch
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/0036—Means reducing energy consumption
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/0063—High side switches, i.e. the higher potential [DC] or life wire [AC] being directly connected to the switch and not via the load

Definitions

  • the present invention relates to an electronic switching device for controlling loads in a motor vehicle.
  • Electronic switching devices are generally known from the prior art and described in various embodiments. These are sometimes used in electronic fuses, which serve to interrupt the flow of current to one or all consumers if a fault (e.g., a short circuit) has been detected.
  • a fault e.g., a short circuit
  • the switching devices known from the prior art offer various advantages. However, no switching devices are known to date that allow a standby mode with reduced energy consumption and, at the same time, an efficient switching mechanism between the standby mode and an active mode.
  • the present invention proposes an electronic switching device for controlling loads in a motor vehicle, comprising a first switching device which is designed as a first transistor and has a control terminal, a first terminal and a second terminal, wherein the first terminal is connected to a supply voltage terminal and the second terminal is connected to a load terminal is connected; wherein the first switching device is designed to provide a supply voltage at the load terminal in a switched-on state, whereby a first current flows through the first load; a second switching device which is designed as a second transistor and which has a control terminal, a first terminal, and a second terminal, wherein the first terminal is connected to the supply voltage terminal and the second terminal is connected to a load terminal; wherein the second switching device is designed to provide the supply voltage at the load terminal in a switched-on state, whereby a second current flows through the first load; wherein the first switching device and the second switching device are designed such that the second current is greater than the first current; a control unit which is designed to transfer the first
  • the first load may have several partial loads, whereby it may be provided that some partial loads remain permanently switched on (i.e. also in standby mode) and some partial loads are switched off in standby mode.
  • the present invention allows to provide a standby mode with reduced energy consumption, whereby an efficient switching between the Standby mode and active mode are enabled by the control unit.
  • a further advantage of the present invention is that the partial loads that are to be permanently supplied are supplied without interruption, since the first transistor can remain permanently switched on.
  • the first transistor and the second transistor can preferably each be embodied as a MOSFET transistor.
  • the first terminal of the first transistor can be a source terminal, while the second terminal of the first transistor can be a drain terminal.
  • the first terminal of the second transistor can be a source terminal, while the second terminal of the second transistor can be a drain terminal.
  • the switching device may comprise a voltage evaluation unit designed to detect a voltage at the first transistor and to generate an output signal as a function of the detected voltage, wherein the voltage evaluation unit is designed to transmit the output signal to the control unit.
  • a voltage evaluation unit designed to detect a voltage at the first transistor and to generate an output signal as a function of the detected voltage, wherein the voltage evaluation unit is designed to transmit the output signal to the control unit.
  • the voltage evaluation unit can be designed as a comparator with two input terminals and one output terminal, wherein the first input terminal of the comparator is connected to the second terminal of the first transistor; the second input terminal of the comparator is connected to a reference voltage, wherein preferably the second input terminal of the comparator is connected to the first terminal of the first transistor; the output terminal of the comparator is connected to an input terminal of the control unit.
  • the first terminal of the first transistor can be a source terminal, while the second terminal of the first transistor can be a drain terminal.
  • the control unit can be designed to switch to the active mode if the voltage measured at the first transistor exceeds a predetermined threshold value.
  • the switching device may comprise a current blocking device designed to block any currents from the load terminal in the direction of the first transistor.
  • the current blocking device can be designed as a diode arranged between the first terminal of the first transistor and the supply voltage terminal, the diode being connected on the anode side to the supply voltage terminal and on the cathode side to the first terminal of the first transistor; or arranged between the second terminal of the first transistor and the load terminal, the diode being connected on the anode side to the second terminal of the first transistor and on the cathode side to the load terminal.
  • the switching device can comprise a third switching device, which is designed as a third transistor and has a control terminal, a first terminal and a second terminal, wherein the first terminal is connected to the supply voltage terminal and the second terminal is connected to a second load terminal; wherein the third switching device is designed to provide a supply voltage at the second load terminal in a switched-on state, whereby a third current flows through a second load; the control unit is designed to transfer the third switching device into a switched-on state and a switched-off state by providing a third control signal at the control terminal of the third switching device; and the control unit is further designed to transfer the electronic switching device into a standby mode and into an active mode, wherein in the standby mode the first switching device is switched on and the second switching device and the third switching device are switched off, and in active mode the first switching device, the second switching device and the third switching device are switched on.
  • a third switching device which is designed as a third transistor and has a control terminal, a first terminal and a second terminal, wherein the first
  • the switching device may comprise a second current blocking device designed to block any currents from the second load terminal in the direction of the first transistor.
  • the second current blocking device can be designed as a second diode which is arranged between the second terminal of the first transistor and the second load terminal, wherein the second diode is connected on the anode side to the second terminal of the first transistor and on the cathode side to the second load terminal.
  • the switching device can comprise a fourth switching device, which is designed as a fourth transistor and has a control terminal, a first terminal, and a second terminal, wherein the first terminal is connected to the supply voltage terminal and the second terminal is connected to a third load terminal; wherein the fourth switching device is designed to provide a supply voltage at the third load terminal in a switched-on state, whereby a fourth current flows through a third load; the control unit is designed to transfer the fourth switching device into a switched-on state and a switched-off state by providing a fourth control signal at the control terminal of the fourth switching device; and the control unit is further designed to transfer the electronic switching device into a standby mode and into an active mode, wherein in the standby mode the first switching device is switched on and the second switching device, the third switching device, and the fourth switching device are switched off, and in the active mode, the first switching device, the second switching device, the third switching device and the fourth switching device are switched on.
  • a fourth switching device which is designed as a fourth transistor and has a control terminal,
  • the switching device may comprise a third current blocking device designed to block any currents from the third load terminal in the direction of the first transistor.
  • the second current blocking device can be designed as a second diode which is arranged between the second terminal of the first transistor and the third load terminal, wherein the third diode is connected on the anode side to the second terminal of the first transistor and on the cathode side to the third load terminal.
  • the first transistor may have an on-resistance Ds(on) that is greater than the on-resistance Ds(on) of the second transistor.
  • Fig. 1 shows a switching device according to the prior art
  • Fig. 2 shows a first embodiment of the switching device according to the invention
  • Fig. 3 shows a second embodiment of the switching device according to the invention
  • Fig. 4 shows a third embodiment of the switching device according to the invention.
  • Fig. 5 shows a fourth embodiment of the switching device according to the invention.
  • Fig. 1 a switching device known from the prior art is shown
  • the switching device 10 for controlling loads in a motor vehicle is shown schematically.
  • the loads are simplified in this figure as a (total) load 16.
  • the switching device 10 has a control unit 14 designed to control a switching device 12.
  • the switching device 12 is embodied as a MOSFET transistor and is connected between a supply terminal 26 and a load terminal 28.
  • Vss supply voltage
  • Such a switching device can be used, for example, in electronic fuses, so that the switching device 12 is deactivated by the control unit 14 as soon as an excessive current through the load 16 is detected.
  • Such a switching device has the disadvantage that it can only switch between an switched-on and an switched-off state. Providing a standby mode in which a reduced current is made available to the load 16 is not readily possible with the switching device 10 shown in Fig. 1.
  • Fig. 2 shows a first embodiment of the switching device 10 according to the invention.
  • the switching device 10 has a control unit 14, a first switching device 12a, and a second switching device 12b.
  • the switching devices 12a and 12b are each implemented as transistors. In the illustrated embodiment, the switching devices 12a and 12b are designed as MOSFET transistors.
  • the control unit 14 is configured to switch the first switching device 12a and the second switching device 12b on and off. In particular, it can be provided that a lower current can flow through the switching device 12a than through the second switching device 12b. This can be achieved by the first transistor having a higher on-resistance R.Ds(on) than the second transistor.
  • the bypass transistor can remain switched on in standby mode, while the second transistor is switched off in standby mode. This provides a relatively small current, which is used to operate those components in a vehicle that should remain permanently switched on. In contrast, in In standby mode, the second transistor is switched off, thereby switching off those loads in the vehicle that have high consumption.
  • the first switching device 12a which is designed as the first transistor, can preferably be equipped with a current-limiting circuit designed to limit the current flowing through the switching device 12a.
  • Fig. 3 schematically shows a second embodiment of the switching device 10 according to the invention.
  • a voltage evaluation unit 18 is provided, which serves to evaluate a voltage at the first transistor.
  • the voltage evaluation unit 18 is designed as a comparator 20.
  • the comparator is designed to evaluate the voltage between the second terminal (drain terminal) of the first transistor and a reference voltage.
  • the reference voltage can, for example, be the voltage at the first terminal (source terminal) of the first transistor.
  • the comparator 20 is designed to deliver an output signal that signals to the control unit 14 that a predetermined threshold voltage at the first transistor has been exceeded. If the threshold voltage is exceeded, this can be interpreted as an indication that individual loads of the motor vehicle have been switched on, so that the control unit 14 can switch from standby mode to active mode.
  • Fig. 4 schematically shows a third embodiment of the switching device 10 according to the invention.
  • a current blocking device 22 is additionally provided, which is designed to block any currents from the load terminal 28 to the first transistor.
  • the current blocking device 22 is designed as a diode 24.
  • the diode 24 is connected on the anode side to the second terminal (drain terminal) of the first transistor and on the cathode side to the load terminal 28.
  • the diode 24 could also be arranged between the supply voltage terminal 26 and the first terminal (source terminal) of the first transistor, wherein the diode 24, in this case, is connected on the anode side to the supply voltage terminal 26 and on the cathode side to the first terminal (source terminal) of the first transistor (not shown in Fig. 4).
  • the current blocking device 22 can alternatively also be implemented by a switching device (in particular by a transistor) which, in the event of reverse currents, prevents this reverse current from flowing into the first transistor. This protects the first transistor (not shown in Fig. 4).
  • Fig. 5 schematically shows a fourth embodiment of the switching device 10 according to the invention.
  • the first switching device 12a is connected to a plurality of switching devices 12b, 12c via a plurality of channels (two channels are shown in Fig. 5).
  • the connection is made via the second terminal of the first transistor (drain terminal), which is connected via a first diode 24a to the second terminal of the second transistor and via a second diode 24b to the second terminal of the third transistor.
  • Different consumers in a motor vehicle can be supplied with energy via the individual channels.
  • the first diode 24a and the second diode 24b ensure that the first transistor is protected from reverse currents (for example, in the event of faults, such as a short circuit).
  • the embodiment shown in Fig. 5 offers the advantage that only a single bypass transistor (first switching device 12a) is required when multiple channels need to be supplied.
  • the embodiment shown in Fig. 5 is particularly advantageous if the switching device 10 has a voltage evaluation unit, in particular in the form of a comparator, which is designed to evaluate a voltage at the first transistor (as shown in Fig. 3).
  • a single voltage evaluation unit in particular in the form of a single comparator, can be used to generate a trigger signal (for example the output signal of the comparator) that causes the control unit 14 to switch from the standby mode to the active mode.
  • a trigger signal for example the output signal of the comparator

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Electronic Switches (AREA)

Abstract

L'invention concerne un appareil de commutation électronique (10) pour commander des charges dans un véhicule automobile, comprenant - un premier dispositif de commutation (12a) qui prend la forme d'un premier transistor et qui comporte une borne de commande, une première borne et une deuxième borne, la première borne étant connectée à une borne de tension d'alimentation (26) et la deuxième borne étant connectée à une borne de charge (28), le premier dispositif de commutation (12a) étant conçu pour fournir une tension d'alimentation au niveau de la borne de charge (28) lorsqu'il est allumé, en conséquence de quoi un premier courant circule à travers la première charge ; - un deuxième dispositif de commutation (12b) qui prend la forme d'un deuxième transistor et qui a une borne de commande, une première borne et une deuxième borne, la première borne étant connectée à la borne de tension d'alimentation (26) et la deuxième borne étant connectée à une borne de charge (28), le deuxième dispositif de commutation étant conçu pour fournir la tension d'alimentation au niveau de la borne de charge (28) lorsqu'il est allumé, en conséquence de quoi un deuxième courant circule à travers la première charge, le premier dispositif de commutation (12a) et le deuxième dispositif de commutation (12b) étant conçus de telle sorte que le deuxième courant est supérieur au premier courant ; et - une unité de commande (14) qui est conçue pour transférer le premier dispositif de commutation (12a) et le deuxième dispositif de commutation (12b) dans chaque cas dans un état allumé et un état éteint en fournissant un premier signal de commande au niveau de la borne de commande du premier dispositif de commutation (12a) et un deuxième signal de commande au niveau de la borne de commande du deuxième dispositif de commutation (12b).
PCT/EP2025/055020 2024-02-26 2025-02-25 Appareil de commutation électronique pour commander des charges dans un véhicule automobile Pending WO2025181069A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102024105287.2 2024-02-26
DE102024105287 2024-02-26

Publications (1)

Publication Number Publication Date
WO2025181069A1 true WO2025181069A1 (fr) 2025-09-04

Family

ID=94869369

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2025/055020 Pending WO2025181069A1 (fr) 2024-02-26 2025-02-25 Appareil de commutation électronique pour commander des charges dans un véhicule automobile

Country Status (1)

Country Link
WO (1) WO2025181069A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130076324A1 (en) * 2010-06-16 2013-03-28 Autonetworks Technologies, Ltd. Power supply control circuit and power supply control device
US20170106820A1 (en) * 2014-07-15 2017-04-20 Yazaki Corporation Power supply control system
DE102017108872A1 (de) 2017-04-26 2018-10-31 Lisa Dräxlmaier GmbH High-Side-Schaltvorrichtung und Herstellungsverfahren für eine solche
DE102019121685A1 (de) 2019-08-12 2021-02-18 Infineon Technologies Ag Intelligenter elektronischer schalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130076324A1 (en) * 2010-06-16 2013-03-28 Autonetworks Technologies, Ltd. Power supply control circuit and power supply control device
US20170106820A1 (en) * 2014-07-15 2017-04-20 Yazaki Corporation Power supply control system
DE102017108872A1 (de) 2017-04-26 2018-10-31 Lisa Dräxlmaier GmbH High-Side-Schaltvorrichtung und Herstellungsverfahren für eine solche
DE102019121685A1 (de) 2019-08-12 2021-02-18 Infineon Technologies Ag Intelligenter elektronischer schalter

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