WO2015104921A1 - Dispositif de commande électronique embarqué - Google Patents

Dispositif de commande électronique embarqué Download PDF

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Publication number
WO2015104921A1
WO2015104921A1 PCT/JP2014/081926 JP2014081926W WO2015104921A1 WO 2015104921 A1 WO2015104921 A1 WO 2015104921A1 JP 2014081926 W JP2014081926 W JP 2014081926W WO 2015104921 A1 WO2015104921 A1 WO 2015104921A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
driver circuit
current
output
driver
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.)
Ceased
Application number
PCT/JP2014/081926
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English (en)
Japanese (ja)
Inventor
修一 宮岡
小林　良一
金川　信康
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.)
Astemo Ltd
Original Assignee
Hitachi Automotive Systems Ltd
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 Hitachi Automotive Systems Ltd filed Critical Hitachi Automotive Systems Ltd
Priority to JP2015556732A priority Critical patent/JPWO2015104921A1/ja
Publication of WO2015104921A1 publication Critical patent/WO2015104921A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
    • H03K17/0822—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in field-effect transistor switches

Definitions

  • the present invention relates to a vehicle-mounted control device including a driver for driving a load and a pre-driver in the preceding stage, and a response to a failure of the drive circuit.
  • JP 2012-157154 As background art in this technical field, for example, there is JP 2012-157154. This publication describes that a failure is detected at a corresponding location and the current is cut off. As background arts in this technical field, there are also JP 2012-157154 A and JP 2010-098907 A.
  • in-vehicle electronic control devices have integrated electronic circuits in the in-vehicle electronic control devices such as injectors, igniters, and solenoids into silicon chips from the viewpoints of the number of parts, cost reduction, and downsizing. It has been studied and put into practical use. Conventionally, when these drive circuits are short-circuited due to a failure, a short-circuit current flows, but the current cut-off means is not provided. An overcurrent detection circuit is provided, and if an overcurrent is detected, the operation of the drive circuit is often stopped and the current is not cut off.
  • Patent Document 1 in recent years, an approach for detecting a failure at a corresponding portion and cutting off the current has been implemented. However, when the gate of the MOS transistor is destroyed, an abnormal current from the previous circuit is also assumed. Further, since the predriver output is not fixed, there is a problem that the operation of the driver circuit becomes unstable.
  • an object of the present invention is to provide a low-cost multi-function IC capable of continuing stable operation of functions other than the corresponding defective portion even when an abnormality occurs in the pre-driver circuit.
  • An object of the present invention is to have an overcurrent detection circuit and a current cut-off circuit as an example, detect an overcurrent, and cut off the current path. Further, when the current is interrupted, this can be achieved by fixing the pre-driver output to Lo or Hi so that the driver circuit does not cause unstable operation due to input floating.
  • the present invention even when an abnormality occurs in the pre-driver circuit, it is possible to provide a multi-function IC capable of continuing stable operation of functions other than the corresponding defective portion at a low cost.
  • FIG. 2 is a block diagram showing a configuration example of a current interrupt circuit according to the first embodiment of the present invention. It is a block diagram which shows the structural example of the multifunctional semiconductor device containing the predriver circuit by the 2nd Embodiment of this invention. It is a block diagram which shows the structural example of the multifunctional semiconductor device containing the predriver circuit by a prior art.
  • FIG. 1 is a block diagram showing a configuration of an embodiment of a multifunction semiconductor device including a pre-driver circuit according to the present invention. 1 is different from the conventional device of FIG. 4 in that a current cut-off switch 25 is provided between the high-side push-pull circuit 19 and the booster circuit 5, and the low-side push-pull circuit of each phase. The difference is that a current cut-off switching element 32 is provided between the power supply circuit 18 and the power supply circuit 4.
  • the feature of the present invention is that, as shown in FIG. 1, the current interrupt switching elements 25 and 32 and the potential fixing switching elements 29 and 39 are provided in a multi-function IC including a pre-driver circuit.
  • the current cut-off switch elements 25 and 32 are provided when the semiconductor switch element 20, 21, 35 or 36 of the pre-driver circuit 14 is short-circuited due to junction breakdown or dielectric breakdown and a large current flows.
  • the current flowing through the pre-driver circuit 14 is cut off.
  • fusing / burning failure due to a large current can be prevented, and the boosted voltage output from the booster circuit 5 or the power supply voltage supplied from the power supply circuit 4 can be prevented from decreasing.
  • other driver boosted voltages or power supply voltages are not affected, and normal output is possible.
  • FIG. 2 is a block diagram showing a configuration example of the current interruption control circuit 11 according to the first embodiment of the present invention.
  • the current cutoff control circuit 11 of this embodiment includes operational amplifiers 45 and 46, filter circuits 47 and 48, and a logic circuit 14.
  • the current cutoff switching element 25 is shown as a representative example, but the current cutoff switching element 32 also has the same configuration.
  • the normal operation is as follows.
  • the high-side semiconductor switch element 27 is turned on and the low-side semiconductor switch element 42 is turned off. At this time, the output of the high-side push-pull circuit 19 is controlled to Hi and the output of the low-side push-pull circuit 18 is controlled to Lo.
  • the high-side semiconductor switch element 27 is turned off and the low-side semiconductor switch element 42 is turned on. At this time, the output of the high-side push-pull circuit 19 is controlled to Lo and the output of the low-side push-pull circuit 18 is controlled to Hi.
  • the short-circuit / open-circuit detections 93 and 94 convert the detection current into a detection voltage and output it to the operational amplifiers 45 and 46.
  • the detected voltage is input to the non-inverting input side of the operational amplifiers 45 and 46.
  • the operational amplifiers 45 and 46 compare the current detection voltage from the short-circuit / open-circuit detection circuits 93 and 94 input to the non-inverting input side with the reference voltage input to the inverting input side, and a comparator corresponding to the comparison result The output is output to the filter circuits 47 and 48.
  • the comparator outputs that have passed through the filter circuits 47 and 48 are logically ORed with the arithmetic processing unit signal by the logic circuit 14 and send out a fault diagnosis output 24.
  • the occurrence of an abnormality can be detected by outputting the failure diagnosis output 24.
  • the detected abnormality is transmitted to the arithmetic processing unit 10 by the SPI signal, and abnormality processing is performed.
  • the fault diagnosis output 24 turns off the current cutoff switching element 25 of the high-side push-pull circuit and the current cutoff switching 32 of the low-side push-pull circuit, and a through current from the booster circuit 5 to the ground via the boosted voltage supply wiring 7
  • the through current flowing from the power supply circuit 4 to the low-side driver 18 is cut off.
  • the through current includes the current flowing between the source and drain of the switching elements 20, 21, 35, and 36 and the push-pull circuits 22 and 37 of the previous stage via the gate electrodes of the switching elements 20, 21, 35 and 36. Some of them flow into the source electrode.
  • a current cut-off switching element 25 is arranged in the power supply section of the high side push-pull circuit 19 and its preceding push-pull circuit, and the low side push-pull circuit 18 and its previous push-pull circuit 37.
  • the current interrupting switching element 32 is disposed in the GND power supply section.
  • the current interrupt control circuit 11 can also control the on / off of the current interrupt switching elements 25 and 32 by the arithmetic processing unit signal output from the arithmetic processing unit 10. That is, it is determined in the arithmetic processing device 10 whether or not a predetermined current interruption condition is satisfied, and when it is determined that the current interruption condition is satisfied, an arithmetic processing device signal is output from the arithmetic processing device 10 to the current interruption control circuit 11. By doing so, the current supply from the power supply circuit 4 to the pre-driver circuit 14 can be forcibly cut off.
  • the arithmetic processing unit 10 can perform on / off control of the current cutoff switching elements 25 and 32 by the arithmetic processing unit signal even when detecting an abnormality in the driver circuit.
  • the multi-function semiconductor device 3 including a pre-driver function is provided for controlling the operations of the high-side semiconductor switch element 27 and the low-side semiconductor switch element 42 and the high-side semiconductor switch element 27 and the low-side semiconductor switch element 42.
  • the pre-driver circuit 14 includes a high-side push-pull circuit 19 provided corresponding to the high-side semiconductor switch element 27 and a low-side push-pull circuit 18 provided corresponding to the low-side semiconductor switch element 42.
  • Current cutoff switching elements 25 and 32 cut off the supply of current to both the high-side push-pull circuit 19 and the low-side push-pull circuit 18, turn on the potential fixing elements 29 and 39, and output the high-side driver output. Fixed low side driver output to high level.
  • the operations of the high-side push-pull circuit 19 and the low-side push-pull circuit 18 are appropriately controlled by the high-side push-pull circuit 19 and the low-side push-pull circuit 18, respectively.
  • the current supply to the circuit is cut off, and other functions are not adversely affected.
  • the current interruption control circuit 11 changes the output voltage of the voltage follower circuit by the operational amplifiers 45 and 46 when the magnitude of the current detected by the current detection circuits 93 and 94 is equal to or greater than a predetermined value. 24 is output.
  • the failure diagnosis signal 24 turns off the current cutoff switching elements 25 and 32 to cut off the supply of current from the power supply circuit 4 and the booster circuit 5 to the pre-driver circuit 14. Thereby, it is possible to reliably detect an abnormality occurring in the pre-driver circuit 14 and cut off the current supply.
  • the current interruption control circuit 11 notifies the arithmetic processing unit 10 that an abnormality has occurred through an SPI (serial peripheral interface) circuit or an MSC (microsecond channel) circuit.
  • SPI serial peripheral interface
  • MSC microsecond channel
  • the multifunctional semiconductor device 3 integrates a plurality of circuits including at least the pre-driver circuit 14, the logic circuit 11, the various drive circuits 51, the power supply circuit 4, the booster circuit 5, and the current cutoff control circuit 11. Thereby, size reduction and cost reduction of a motor control apparatus etc. can be achieved.
  • the abnormality is detected by the short-circuit detection circuit 52.
  • the abnormality detection signal 53 is transmitted to the arithmetic processing device 10.
  • the arithmetic processing unit 10 outputs a current cutoff signal 54, turns off the high-side current source switch element 28 via the boost driver circuit 61, and causes the current cutoff control circuit 11 to output an arithmetic processing unit signal through the SPI circuit or the MSC circuit. 55 is sent out.
  • the current cutoff control circuit 11 cuts off the current of the pre-driver circuit 14 and fixes the output to low level / high level.
  • the driver IC Using a serial communication between the microcontroller and the driver IC, the driver IC has a control unit that performs diagnostic control of the driver IC. When a failure is detected, the circuit is immediately deactivated. The occurrence of serious defects such as fusing can be prevented. Therefore, it can be applied to an apparatus that requires high reliability.

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Abstract

La présente invention vise à fournir, à un faible coût, un circuit intégré (IC) multifonction qui peut poursuivre des opérations stables à l'exception de la partie qui est affectée quand une anomalie s'est produite dans un circuit de pré-dispositif d'attaque. A cet effet, selon l'invention, le dispositif à semi-conducteurs multifonction (1), qui comprend un circuit de pré-dispositif d'attaque, comporte des circuits d'interruption de courant (25, 32). Quand un fort courant a circulé dans le circuit de pré-dispositif d'attaque en résultat d'un défaut de court-circuit du fait d'une rupture de jonction ou d'une rupture de diélectrique qui est provoquée par un bruit appliqué à l'un quelconque des composants de commutation (20, 21, 35, 36) du circuit de pré-dispositif d'attaque (14), le courant circulant dans le circuit de pré-dispositif d'attaque défectueux (14) est interrompu par les circuits d'interruption de courant (25, 32), empêchant une chute de la tension d'alimentation. Dans ce cas, le potentiel de sortie du pré-dispositif d'attaque est fixé à un faible niveau du côté haut et à un niveau élevé du côté bas, de façon à rendre le circuit inactif.
PCT/JP2014/081926 2014-01-09 2014-12-03 Dispositif de commande électronique embarqué Ceased WO2015104921A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015556732A JPWO2015104921A1 (ja) 2014-01-09 2014-12-03 車載用電子制御装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-002083 2014-01-09
JP2014002083 2014-01-09

Publications (1)

Publication Number Publication Date
WO2015104921A1 true WO2015104921A1 (fr) 2015-07-16

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PCT/JP2014/081926 Ceased WO2015104921A1 (fr) 2014-01-09 2014-12-03 Dispositif de commande électronique embarqué

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JP (1) JPWO2015104921A1 (fr)
WO (1) WO2015104921A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017106370A1 (de) 2016-04-22 2017-10-26 Mitsubishi Electric Corporation Wechselstromrotationsmaschinensteuervorrichtung
EP3442019A4 (fr) * 2016-04-06 2019-12-04 Shindengen Electric Manufacturing Co., Ltd. Module de puissance
US11486325B2 (en) 2018-09-13 2022-11-01 Hitachi Astemo, Ltd. Injector control unit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005064152A (ja) * 2003-08-08 2005-03-10 Taiheiyo Seiko Kk インテリジェントパワースイッチ装置
JP2010028522A (ja) * 2008-07-22 2010-02-04 Seiko Epson Corp 半導体装置
JP2011109779A (ja) * 2009-11-16 2011-06-02 Jtekt Corp モータ制御装置、電動パワーステアリング装置及び車両用操舵装置
JP2012157154A (ja) * 2011-01-26 2012-08-16 Hitachi Automotive Systems Ltd モータ制御装置
JP2012158318A (ja) * 2011-01-10 2012-08-23 Jtekt Corp 電動パワーステアリング装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009220766A (ja) * 2008-03-18 2009-10-01 Jtekt Corp 電動パワーステアリング装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005064152A (ja) * 2003-08-08 2005-03-10 Taiheiyo Seiko Kk インテリジェントパワースイッチ装置
JP2010028522A (ja) * 2008-07-22 2010-02-04 Seiko Epson Corp 半導体装置
JP2011109779A (ja) * 2009-11-16 2011-06-02 Jtekt Corp モータ制御装置、電動パワーステアリング装置及び車両用操舵装置
JP2012158318A (ja) * 2011-01-10 2012-08-23 Jtekt Corp 電動パワーステアリング装置
JP2012157154A (ja) * 2011-01-26 2012-08-16 Hitachi Automotive Systems Ltd モータ制御装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3442019A4 (fr) * 2016-04-06 2019-12-04 Shindengen Electric Manufacturing Co., Ltd. Module de puissance
DE102017106370A1 (de) 2016-04-22 2017-10-26 Mitsubishi Electric Corporation Wechselstromrotationsmaschinensteuervorrichtung
US10135380B2 (en) 2016-04-22 2018-11-20 Mitsubishi Electric Corporation AC rotary machine control apparatus
US11486325B2 (en) 2018-09-13 2022-11-01 Hitachi Astemo, Ltd. Injector control unit

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