EP1963933A2 - Electronic device for commutation of electric load controlled by a microcontroller - Google Patents

Electronic device for commutation of electric load controlled by a microcontroller

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Publication number
EP1963933A2
EP1963933A2 EP20060842125 EP06842125A EP1963933A2 EP 1963933 A2 EP1963933 A2 EP 1963933A2 EP 20060842125 EP20060842125 EP 20060842125 EP 06842125 A EP06842125 A EP 06842125A EP 1963933 A2 EP1963933 A2 EP 1963933A2
Authority
EP
Grant status
Application
Patent type
Prior art keywords
mode
microcontroller
vbat
device
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.)
Withdrawn
Application number
EP20060842125
Other languages
German (de)
French (fr)
Inventor
Christophe Dang Van Nhan
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.)
Renault SAS
Original Assignee
Renault SAS
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

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00Electric 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
    • B60R16/02Electric 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
    • B60R16/03Electric 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
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T307/00Electrical transmission or interconnection systems
    • Y10T307/74Switching systems
    • Y10T307/937Switch actuation
    • Y10T307/944Power circuit controlled

Abstract

The invention relates to an electronic device (10) for commuting an electric load, comprising an electronic commutator (16) controlled by a microcontroller (12), positively supplied at a voltage (Vcc), with an outlet which may adopt at least three states and operating in a 'nominal' mode which may be switched intentionally or by default to a 'failsafe' mode in case of malfunction of said electronic commutation device (10), characterised in that said electronic commutation device (10) additionally comprises: a positive commuted supply (Vbat) greater than (Vcc) and connected to the microcontroller (12) of the electronic commutation device (10) by a resistive polarisation device (14) to carry out the function of safety barrier, and an interface device (18) for recognising the presence or absence of commuted supply (Vbat). The invention further relates to a method for operating such a device.

Description

DEVICE LOAD SWITCHING POWER ELECTRONICS CONTROL MCU

The invention relates to an electric load switching device by an electronic microcontroller. The application to lighting functions and automotive sentence is particularly suitable.

When microcontroller electronic system which switches an electrical charge fails, this charge is reflected in an uncontrolled state and fixed. The load loss of control makes unavailable desired function. The unavailability of the function may in some cases undermine the security of the system that hosts and environment.

A fixed and permanent state of charge, whether predisposed default or set randomly, can ultimately also lead to other malfunctions that themselves can induce avalanche failures on other systems.

Currently, the problem is managed by implementing a degraded mode, intentionally or simply by default.

A simple degraded mode is to place the load in a permanent inactive state. The direct disadvantage is the loss of availability of the load switching function. The indirect disadvantage is the potential loss of security due to the loss of availability. Furthermore, the inactive state is not necessarily the most appropriate condition on functional and safe planes.

Another degraded mode is to place the load in a permanent active state, to better meet the functional and security needs. In this mode, we find the same aforementioned drawbacks for the simple degraded mode. Moreover, prolonged active state may lead to other malfunctions such as overheating, over-consumption, the destruction of the load or the associated switch. These can induce avalanche failures on other systems like cables, fuses, energy sources. This may even have adverse effects on the availability and security. Both degraded modes described above are in fact only shelters modes according to current terminology in the field of operational safety, since they inhibit the function and make it unavailable.

But to maintain the availability of the function, the solution is to implement redundant systems, duplication of the electronic system or the addition of a manual backup system.

However, a major drawback is the significant additional cost that this entails. Moreover, an arbitration function more or less complex must be implemented to resolve any conflicts between the two actors and clearly delineate the roles of each in nominal mode and degraded mode, in order to properly meet the availability requirements and of security.

To this end the invention provides an electronic device electrical charging switch including an electronic switch controlled by microcontroller improved.

The invention therefore relates to an electronic device of electrical charge switch comprising an electronic switch controlled by microcontroller supplied with a voltage Vcc, comprising an output port to at least three states and operating in a "nominal" mode, the latter being adapted to change to a mode "degraded" intentionally or by default in the event of failure of said device, characterized in that said electronic device further comprises: - a switched supply Vbat connected via a resistive biasing device to the electronic device microcontroller to act Crash barrier, - an interface device for recognizing the presence or absence of the switched supply Vbat.

Thus, the object of the invention is to implement a degraded mode intermediate between the nominal mode and emergency program to improve the availability and system security without adding complexity that could affect the reliability , availability, security, and system cost.

The invention therefore provides an electronic device of electrical charge switch comprising an electronic switch controlled by microcontroller positively supplied at a voltage Vcc, comprising an output port to at least three states and operating in a "nominal" mode, the latter being adapted to change to a mode "degraded" intentionally or by default in case of failure of said electronic switching device, characterized in that said electronic switching device further comprises:

- a switched positive supply Vbat greater than Vcc and connected via a resistive biasing device to the microcontroller of the electronic switching device for security of a barrier, and

- an interface device for recognizing the presence or absence of the switched power.

According to the characteristics of the invention:

- of the electronic switching device states for selecting the operating mode "nominal" or "degraded" to give priority to the electronic switching device,

- the VDC low impedance state and low impedance ground on the microcontroller output port are the most dominant states,

- the high impedance state of the microcontroller is the recessive, - the switched supply Vbat applied through the resistive bias device is an intermediate state of dominance,

- the passage of the "nominal" mode to the "degraded" mode is achieved by passing the output port of the microcontroller of a low impedance state to a high impedance state of the mass or of the power supply Vcc, Preferably, switched supply Vbat for the "degraded" mode is a common power supply to other devices of a host system in which the active state is representative of an overall phase of operation of the host system,

Advantageously, the switched supply Vbat for the "degraded" mode following a pre-existing manual switch or added to the host system, advantageously, the switched supply Vbat for the "degraded" mode comes at a time of a common power supply to other devices of the host system and a specific pre-existing manual or added in the host switch,

Preferably, the host systems are either a position lamp, a stop lamp, a trunk unlock engine of a motor vehicle.

According to one characteristic of the invention, the electronic switching device further comprises, a sleeping device for carrying the electronic device mode switching "sleep", said sleep device being powered by a switched supply Vbat and triggered intentionally by the microcontroller, in which the output ports switch to a high impedance state and in which the load is permanently deactivated. The invention also relates to a method for operating an electronic device electrical load switching controlled by a microcontroller operating in a "nominal" mode and adapted to pass in a "degraded" mode intentionally or by default in the event of failure of the device comprising the following steps: - passing the output port of the microcontroller of a low impedance state to a high impedance status of the body or of the supply Vcc, b - polarization of the electronic device by the switched supply Vbat, upper to Vcc, and c - activation and deactivation of the load in accordance with switching of the switched supply Vbat. Advantageously, the passage from one of the "nominal" operating modes or "degraded" to a "sleep" mode is carried out according the following steps: a - activation by the microcontroller from sleep mode device, b - passing ports output of the microcontroller to the high impedance recessive state to maintain the active sleep device, c - permanent deactivation of the load until the return to nominal mode. The invention will now be described without limitation with reference to the accompanying drawings, in which:

- Figure 1 shows schematically a device according to the invention the application is a sidelight,

- Figure 2 schematically shows a device according to the invention whose application is brake light,

- Figure 3 schematically shows a device according to the invention the application is a trunk unlock motor, and

- Figure 4 schematically shows a sleep mode device according to the invention.

Referring to the drawings, the present invention enables efficient implementation of an electrical load switching function according to a mode known as "nominal" when the system does not fail, and according to a mode called "degraded" mode when " nominal "can not be ensured following a failure.

In particular, the degraded mode is implemented on the principle of safety barrier, namely an as independent as possible palliative device active only in degraded mode and monitored regularly in nominal mode. This advantageously ensures compliance with availability and security requirements.

According to the main feature, the device is constituted of: - a positive supply Vbat,

- a positive power supply Vcc, less than Vbat,

- a microcontroller 12 supplied with the voltage Vcc,

- a means of monitoring, acting as a "watchdog", which resets the microcontroller 12 in case of voltage drop or not refresh the microcontroller 12,

- an output port of the microcontroller 12 to three states: Vcc low impedance, low impedance and high impedance ground. Conventionally, the high impedance state is the state in which the microcontroller 12 is not supplied or when it is reset.

- an electronic switch 16, controlled by the output port of the microcontroller 12 which switches the power to the load when it is positively biased.

With these provisions, it can operate in nominal mode as follows: the charge is activated by setting the output port Vdc low impedance - the load is disabled by configuring the output port in low ground impedance - it n is not made use of the high impedance state. According to an additional characteristic, the device 10 receives: a switched supply Vbat: commonly present in automobile, typically switched by the ignition key or similar device, or switched by a manual switch, a resistive biasing means 14 which connects the Vbat switched state for controlling the electronic switch 16, also connected to the output port of the microcontroller 12, - an interface device 18 which connects the Vbat switched state to another port of the microcontroller 12 configured as a digital input, to recognize the presence or absence of the switched state Vbat.

Through these provisions, it can operate in degraded mode. First, the passage in degraded mode is indicated by the passage of the output port of the microcontroller 12 to the high impedance state intentionally or by default when the microcontroller 12 fails. Then, the electronic switch

1 6 is biased by the switched state Vbat. Finally, the load is turned on and off in accordance with switching of the switched supply Vbat.

Moreover, thanks to these provisions, it can operate in nominal mode. First, the load is turned on and off in accordance with switching of the microcontroller output port 12 between a Vcc low impedance state and a low impedance mass, without being disturbed by the switched state Vbat connected via a resistive biasing device 14. Then, the switched state Vbat, which acts as a safety barrier board is monitored regularly on the input port of the microcontroller 12, so as to detect the possible loss of the barrier and to take the necessary measures. In fact, arbitration between the nominal mode and degraded mode devices is done naturally by the dominant and recessive characters of these devices. So :

• Vdc the low impedance state and low ground impedance of the output port of the microcontroller 12 are the most dominant states.

• the high impedance state of the microcontroller 12 is the most recessive state.

• the switched state Vbat applied through a resistive biasing device 14 is an intermediate state of dominance.

According to a first application example, the switched state Vbat is a common power supply to other benefits, typically a switched power by the ignition key of an automobile. With this arrangement, in a degraded mode, activates and deactivates the load along with other services which share the commutated Vbat state, according to an overall operating phase of the host system 22.

On the other hand, in a second application, the commutated Vbat state is a switched power by a specific manual contact (but possibly pre-existing) which is actuated precisely at the time when it would be desirable to switch the load, typically a contact brake pedal which is supposed to be synchronous with the illumination of the stop lamps. Thus, in degraded mode, it activates and deactivates the load in conditions of the operation in nominal mode.

Finally, in a third application, the commutated Vbat state is a switched power supply according to several conditions, typically a combination of a common switched state Vbat (key type contact) and a specific manual contact. Thus, in degraded mode, you can implement more advanced activation strategies, typically switching on and off of the load only in a window authorized by the Vbat common switched state. According to a variant embodiment, a third mode of operation is added, namely, the sleep mode which is shown diagrammatically in Figure 4 described later in the description. This is a way intentionally triggered by the microcontroller 12, wherein the output ports go to the high impedance state, and in which the load is permanently deactivated.

According to a first embodiment of this variant, the switched Vbat state is considered to cut simultaneously the passage in sleep mode, and under these conditions the electronic switching device 1 0 is so designed that the load becomes active not. Thus, the transition to sleep mode induces the permanent deactivation of the load, until the return to nominal mode.

According to a second embodiment of this variant, the switched state Vbat is considered not cut simultaneously passing in sleep mode, in which case it is necessary to prevent this sleep mode triggers the degraded mode, since the recessive state high impedance from sleep mode leaves the control to the degraded mode devices. To this end, we add a device 20 which is activated to shift to sleep mode, and forcing the deactivation of the filler with a dominant state preventing any action by the degraded mode devices, and this throughout the sleep mode. Such a device 20 is controlled directly or indirectly by the microcontroller 12, and thus has a capacity for storing its state when the microcontroller 12 is no longer capable of controlling after its passage in sleep mode.

Thanks to these features, switching to sleep mode is made, first, by the microcontroller 12 which activates the sleep mode device and puts itself into sleep mode. Then, the output ports of microcontroller 12 go into high impedance. The device 20 of sleep mode while maintaining its active state. This state of the device 20 from sleep mode forces the permanent deactivation of the load, until the return to nominal mode (when the microcontroller 12 will disable the sleep mode device).

Other features and advantages of the invention will become apparent from the following description in the accompanying drawings which are given by way of non-limiting examples.

First Embodiment: example of the position light

According to this first embodiment shown in FIG 1, the electronic switch 16 is made by way of example with a relay configuration for forcing the Vbat state or so-called "high side" in English (component K1) controlled by an NPN bipolar transistor configuration allowing drawing to ground or so-called "low side" in English (component Q1 and R1 and bias resistors R2). This electronic switch 1 to 6 is itself controlled by an output port with three states of the microcontroller 12 (port "command"). With these arrangements, the operation in nominal mode is ensured: the load is activated when the control is at low impedance Vcc, and deactivated when the control is at low impedance ground.

To this is added a switched supply Vbat (eg, a switched power by the ignition key of an automobile) connected by a resistor R3 for controlling the electronic switch June 1 (also connected to the output port of the microcontroller 12).

Thus it ensures the functioning in degraded mode when the output port of the microcontroller 12 is in the high impedance recessive state: the load is activated when the switched Vbat state is present, and switched off when Vbat state is muted. These provisions do not affect the operation in normal mode, because of the resistive connection R3 which must be sufficiently resistive to be recessive relative to the low output impedances of the microcontroller port 12. To this must be added a device '1 interface 8, made by way of example with a bridge of resistors R4 and R5, allowing the microcontroller 12 to detect the presence or absence of Vbat switched state by simple binary reading an input port ( "surveillance" port). Thanks to these provisions, monitors the integrity of the security fence during operation in nominal mode.

According to this first embodiment, it ensures the availability and safety of the function by the implementation of a nominal mode and a degraded mode with surveilled security barrier, preferably using the high intrinsic impedance recessive state the microcontroller 12 in case of failure, and preferably using a switched already available Vbat state (eg ignition key into an automobile) for switching the load in degraded mode (for example, ignition of the position lamp in the start-up vehicle and fire extinguishing the ignition is switched off).

Second Embodiment: example of the brake light

According to this second embodiment shown in Figure 2, 1 6 Electronic switch is made by way of example with a relay configuration for forcing the Vbat state (component K2) controlled by an NPN bipolar transistor configured to pulling to ground (component Q2 and bias resistors R6 and R7). This electronic switch 1 to 6 is itself controlled by an output port with three states of the microcontroller 12 (port "command"). With these arrangements, the operation in nominal mode is ensured: the load is activated when the control is at low impedance Vcc, and deactivated when the control is at low impedance Mass.

To this is added a supply Vbat switched by manual contact such as the contact of the brake pedal connected by a resistor R8 to the control of the electronic switch 16 also connected to the output port of the microcontroller 12. With these arrangements, operates in a degraded mode where the output port of the microcontroller 12 is in the high impedance recessive state: the load is activated when the manual switch is closed, and turned off when the manual switch is open.

These provisions do not alter the operation in nominal mode, because of the resistive connection R8 that must be sufficiently resistive to be recessive relative to the low output impedances of the port of microcontroller 12.

In addition, it holds an interface device 1 8, made by way of example with a bridge of resistors R9 and R1 0, allowing the microcontroller 12 to detect the closing or opening of the manual contact by simple binary read an input port ( "surveillance").

Thus, it monitors the integrity of the safety fence during operation in the nominal mode, provided that manual contact is activated regularly in nominal mode. This is the case of the stop lamp such as closing the contact of the brake pedal is very common and also very often the cause of the brake light activation decision in nominal mode.

According to this second embodiment, it ensures the availability and safety of the function by the implementation of a nominal mode and a degraded mode with surveilled security barrier, preferably using the high intrinsic impedance recessive state the microcontroller 12 in case of failure, and preferably using a manual contact already available for switching the load in degraded mode such as fire ignition stop at each press of the brake pedal.

Third Embodiment: example of the trunk déverrouillaαe engine According to this third embodiment shown in Figure 3, the electronic switch 16 is made by way of example with a relay configuration for forcing the Vbat state (component K3) controlled by an NPN bipolar transistor configured to draw the ground (component Q3 and resistors R11 and R12 bias). The electronic switch 16 is itself controlled by an output port with three states of the microcontroller 12 (port "command"). With these arrangements, the operation in nominal mode is ensured: the load is activated when the control is at low impedance Vcc, and deactivated when the control is at low impedance Mass.

Added to this is a device composed of a bipolar PNP transistor configuration for forcing the Vbat state (component Q4 and bias resistors R14 and R15), powered by a switched Vbat state (eg, a switched power supply by the ignition key of an automobile) and controlled by manual contact, all being connected via a resistor R13 to control the electronic switch 16 also connected to the output port of the microcontroller 12.

Thanks to these provisions, it operates in degraded mode when the output port of the microcontroller 12 is in the recessive state high impedance, as a more advanced strategy: charging is activated when the manual switch is off, and disabled when the manual contact is open, but all this only when switched Vbat state is present because when it is off the load is disabled regardless of the state of the manual contact. These provisions do not affect the operation in normal mode, because of the resistive connection R13 which must be sufficiently resistive to be recessive relative to the low output impedances of the microcontroller port 12. To this must be added a device '1 interface 8, made by way of example with a resistance bridge R1 6 and R17, allowing the microcontroller 12 to detect the presence or absence of the condition

Vbat switched by simple binary reading an input port (port "monitoring").

Thanks to these provisions, monitors the integrity of the security fence during operation in nominal mode, provided that the manual contact health is also monitored in nominal mode. This may be the case of the example of the safe release since closing the contact is read harbor "request" in nominal mode, but this can be difficult to implement given the activation statistics Contact not as simple as in the case of the brake pedal switch. According to this third embodiment, it ensures the availability and safety of the function by the implementation of a nominal mode and a degraded mode with surveilled security barrier, preferably using the high intrinsic impedance recessive state the microcontroller 12 in case of failure, and preferably using a switched state Vbat already available (for example, ignition key into an automobile) and a manual contact already available (for example: the contact opening box) for switching the load in degraded mode, according to an advanced strategy (eg, trunk release at each pressure on the opening contact, provided that the key switch is pressed).

According to a variant of this third embodiment, and by replacing in Example trunk unlocking, the guide used in degraded mode contact is a different contact of the manual contact used in nominal mode for controlling the unlocking, in order to ensure tolerance for a foul on these contacts (while a single manual contact for both the nominal mode and degraded mode can lead to the unavailability of the function on a simple failure of the contact).

Variant of: sleep mode device

According to an alternative embodiment shown in Figure 4, is added a device 20 for rocking realized for example with an NPN bipolar transistor configured to draw the ground (component Q5 and bias resistors R18 and R19), fed back through a resistor R22 with a PNP bipolar transistor configuration for forcing in the switched state Vbat (component Q6 and bias resistors R20 and R21).

This flip-flop 20 is fed under a switched supply Vbat, and controlled by an output port with three states of the microcontroller 12 (port "sleep") so as to behave as follows depending on the state of the output port :

• A low impedance Vcc, point A is at the low ground impedance, point B is at the low impedance Vbat state • A low-impedance ground, point A is in the high impedance Vbat state, point B is the high impedance earth, and

• high-impedance A, points A and B retain their state (but with a still higher impedance to B in the high impedance state mass) The points A and B are connected at their homonyms in FIG 1 of the first embodiment (example fire position) and Figure 3 of the third embodiment (example of the unlocking box).

Thanks to these provisions, the microcontroller 12 can signal sleep mode transfer by putting its output port to low impedance Vcc, and store this state during the actual passage in sleep mode and the high impedance of the output port setting. In this state, the electronics 16 of the first embodiment switch (example of the position lamp) is biased to ground, and Vbat switched state of the third embodiment (example of the unlocking box) is forced to break, resulting in inhibition fillers, prohibiting any mode of gradient device to implement, until the return to nominal mode (when the microcontroller 12 will again change to the state of the latch by placing a low impedance mass on its output port).

Also with this device, can be prevented stealth activation of the load while the microcontroller 12 resets and its output ports are in the high impedance state, particularly in the first embodiment where the switched state Vbat may be present during the reset.

Claims

1. An electronic device (10) of electrical charge switch comprising an electronic switch (16) controlled by microcontroller (12) powered at a voltage positively
(Vcc), comprising an output port to at least three states and operates in a mode "nominal", the latter being adapted to pass in a mode "degraded" intentionally or by default in the event of failure of said electronic switching device (10 ), characterized in that said electronic switching device (1 0) further comprises:
- a switched positive supply (Vbat) greater than (Vcc) and connected by a resistive biasing device (14) to the microcontroller (12) of the electronic switching device (1 0) for crash barrier office, and
- an interface device (18) for recognizing the presence or absence of the power supply (Vbat) switched.
2. Electronic device according to claim 1, characterized in that the operating states of the electronic switching device (1 0) for selecting the "nominal" mode or "degraded" to give priority to the electronic switching device (1 0).
3. Electronic device according to claim 2, characterized in that the states (Vcc) and low impedance low impedance mass of the microcontroller output port (12) are the most dominant state.
4. An electronic device according to one of Claims 2 or 3, characterized in that the high impedance state of the microcontroller
(12) is the recessive.
5. Electronic device according to one of claims 2 to 4, characterized in that the power supply (Vbat) switched applied through the resistive bias device (14) is an intermediate state of dominance.
6. Electronic device according to claim 1, characterized in that the passage of the "nominal" mode to the "degraded" mode is achieved by passing the output port of a low impedance state microcontroller to a high impedance state of the mass or the power supply (Vcc).
7. An electronic device according to claim 1, characterized in that the power supply (Vbat) switched to the "degraded" mode is a common power supply to other devices of a host system (22), the active state represents an overall phase of operation of the host system (22).
8. Electronic device according to one of the preceding claims, characterized in that the power supply (Vbat) switched to the "degraded" mode originated from a pre-existing manual switch or added in the host system (22).
9. Electronic device according to one of the preceding claims, characterized in that the power supply (Vbat) switched to the "degraded" mode is derived from both a common power supply to other devices of the host system (22) and a pre-existing specific manual or added in the host system switch (22).
10. An electronic device according to one of claims 7 to 9, characterized in that the host systems (22) are either a position lamp, a stop lamp, a trunk unlock engine of a motor vehicle.
11. An electronic device according to one of the preceding claims, characterized in that it further comprises a sleep device (20) for carrying the electronic switching device (10) in "sleep" mode, said device sleep (20) being powered by a power supply (Vbat) and switched intentionally triggered by the microcontroller (12), wherein the output ports pass the high impedance state and wherein the load is permanently deactivated.
12. A method of operating an electronic device electrical load switching controlled by microcontroller (12) operating in a "nominal" mode and adapted to pass in a "degraded" mode intentionally or by default in the event of failure of the device, characterized in that it comprises the following steps: - passing the microcontroller output port (12) of a low impedance state to a high impedance state or the mass of the supply (Vcc), b - polarization of the device e by the power supply (Vbat) switched, greater than (Vcc), and c - activation and deactivation of the load according to the power switching (Vbat) switched.
13. The method of claim 12, characterized in that the passage of one of the operating modes "nominal" or "degraded" to a "sleep" mode is carried out according the following steps: a - activation by the microcontroller (12 ) of the device (20) sleep mode, b - passing the output ports of the microcontroller (12) to the high impedance recessive state to hold the device (20) active, c - permanent deactivation of the load to return to nominal mode.
EP20060842125 2005-12-22 2006-12-08 Electronic device for commutation of electric load controlled by a microcontroller Withdrawn EP1963933A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR0553984A FR2895535B1 (en) 2005-12-22 2005-12-22 Electronic device load switching electrical control by microcontroller
PCT/FR2006/051314 WO2007074257A3 (en) 2005-12-22 2006-12-08 Electronic device for commutation of electric load controlled by a microcontroller

Publications (1)

Publication Number Publication Date
EP1963933A2 true true EP1963933A2 (en) 2008-09-03

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EP20060842125 Withdrawn EP1963933A2 (en) 2005-12-22 2006-12-08 Electronic device for commutation of electric load controlled by a microcontroller

Country Status (5)

Country Link
US (1) US7808130B2 (en)
EP (1) EP1963933A2 (en)
JP (1) JP5052526B2 (en)
FR (1) FR2895535B1 (en)
WO (1) WO2007074257A3 (en)

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Publication number Priority date Publication date Assignee Title
DE102008052322B8 (en) * 2008-10-20 2011-11-10 Continental Automotive Gmbh Integrated Limp Home System
FR3024794B1 (en) * 2014-08-05 2016-09-02 Continental Automotive France Method of acquisition of signals, such as signals representative of the state of contacts of a motor vehicle

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Publication number Priority date Publication date Assignee Title
JP2768791B2 (en) * 1990-03-09 1998-06-25 三菱自動車工業株式会社 Vehicle electronic control unit
DE19919729A1 (en) * 1999-04-30 2000-11-02 Opel Adam Ag Functional group control device for motor vehicle has controller which activates direct drive circuit in event of fault in one of controllers or data bus
JP3679700B2 (en) * 2000-10-18 2005-08-03 アイシン精機株式会社 The vehicle lamp control device
JP4236894B2 (en) * 2002-10-08 2009-03-11 株式会社小糸製作所 Lighting circuit
JP4281395B2 (en) * 2003-04-04 2009-06-17 株式会社デンソー Vehicle control apparatus
JP4415655B2 (en) * 2003-11-26 2010-02-17 住友電装株式会社 The vehicle lamp control device

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See references of WO2007074257A2 *

Also Published As

Publication number Publication date Type
JP2009525902A (en) 2009-07-16 application
JP5052526B2 (en) 2012-10-17 grant
WO2007074257A3 (en) 2008-03-27 application
WO2007074257A2 (en) 2007-07-05 application
FR2895535B1 (en) 2008-02-15 grant
US7808130B2 (en) 2010-10-05 grant
US20090091374A1 (en) 2009-04-09 application
FR2895535A1 (en) 2007-06-29 application

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