JP5656885B2 - In-vehicle electronic control unit - Google Patents
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- JP5656885B2 JP5656885B2 JP2012007611A JP2012007611A JP5656885B2 JP 5656885 B2 JP5656885 B2 JP 5656885B2 JP 2012007611 A JP2012007611 A JP 2012007611A JP 2012007611 A JP2012007611 A JP 2012007611A JP 5656885 B2 JP5656885 B2 JP 5656885B2
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Description
本発明は、車載用電子制御装置における電源ラインに関係する負サージ保護回路構成、並びに負サージ保護回路の削減案に関する。またＶＢ電源経路部品のショート故障の保証に関する。 The present invention relates to a negative surge protection circuit configuration related to a power supply line in an in-vehicle electronic control device, and a reduction plan for the negative surge protection circuit. It also relates to guaranteeing short-circuit failures in VB power supply path components.
従来、車載用制御装置には、車載電源に接続された外部接続端子からのサージから内部回路を保護するためのサージ保護回路が設けられている。また、特許文献１には複数の外部接続端子それぞれに設けられたサージ保護回路を共用化し、部品点数削減することが開示されている。 Conventionally, in-vehicle control devices are provided with a surge protection circuit for protecting an internal circuit from a surge from an external connection terminal connected to an in-vehicle power source. Patent Document 1 discloses that a surge protection circuit provided for each of a plurality of external connection terminals is shared to reduce the number of components.
従来技術では、ダイオードＯＲ回路と負サージ保護回路の部品点数（製造工数）、部品材料費、部品実装面積率については配慮がされておらず、部品点数（製造工数）過多、部品材料費過多、部品実装面積率過多の問題があった。 In the conventional technology, consideration is not given to the number of parts (manufacturing man-hours), parts material cost, and component mounting area ratio of the diode OR circuit and negative surge protection circuit, and there are too many parts (manufacturing man-hours), excessive parts material costs, There was a problem of excessive component mounting area ratio.
本発明は、ダイオードＯＲ回路と負サージ保護回路を統合することを目的としており、さらに部品点数（製造工数）低減、部品材料費低減、部品実装面積率低減を提供することを目的とする。 An object of the present invention is to integrate a diode OR circuit and a negative surge protection circuit, and to provide a reduction in the number of parts (manufacturing man-hours), a part material cost, and a part mounting area ratio.
本発明の他の目的は統合後も従来と同等のＶＢａｔｔ電源経路部品のショート故障（１次故障）を保証することにある。 Another object of the present invention is to guarantee a short-circuit failure (primary failure) of the VBatt power supply path components equivalent to the conventional one even after integration.
上記目的を達成するために、ダイオードＯＲ回路の構成を、ツェナーダイオードと整流ダイオードのＯＲ回路構成とし、ツェナーダイオード側の負サージ保護回路を削減し、さらに整流ダイオード側の負サージ保護回路のツェナーダイオードをＯＲ回路の整流ダイオードと直列で設置し、負サージ保護回路のツェナーダイオードとＯＲ回路の整流ダイオード間に負サージ保護回路の整流ダイオードを還流方向に設置することで、還流方向に設置した整流ダイオードが、ＯＲ回路の両側（ツェナーダイオード側及び整流ダイオード側）へ作用するようにしたものである。 In order to achieve the above object, the configuration of the diode OR circuit is an OR circuit configuration of a Zener diode and a rectifier diode, the negative surge protection circuit on the Zener diode side is reduced, and the Zener diode of the negative surge protection circuit on the rectifier diode side is further reduced. Is installed in series with the rectifier diode of the OR circuit, and the rectifier diode of the negative surge protection circuit is installed in the return direction between the Zener diode of the negative surge protection circuit and the rectifier diode of the OR circuit. Is configured to act on both sides (the Zener diode side and the rectifier diode side) of the OR circuit.
本発明によれば、ＶＢａｔｔ電源とＶｉｇｎ電源のＯＲ回路と、ＶＢａｔｔ電源系とＶｉｇｎ電源系の負サージ保護回路及び、ＶＢａｔｔ電源経路部品のショート故障（１次故障）の保証回路を統合することができるので、従来技術と同等の性能を維持した上で、部品点数（製造工数）低減、部品材料費低減、部品実装面積率低減できるという効果を奏する。 According to the present invention, the OR circuit of the VBatt power supply and the Vign power supply, the negative surge protection circuit of the VBatt power supply system and the Vign power supply system, and the short circuit failure (primary failure) guarantee circuit of the VBatt power supply path component can be integrated. Therefore, it is possible to reduce the number of parts (manufacturing man-hours), the part material cost, and the part mounting area ratio while maintaining the same performance as the conventional technology.
以下、図面を用いて説明を行う。
単純に、負サージ保護回路（Ｚ２１，Ｚ２２，Ｄ２１，Ｄ２５）、ダイオードＯＲ回路（Ｄ２２，Ｄ２３）、ＶＢａｔｔ電源経路部品のショート故障の対策（Ｄ２４）をそれぞれ独立して車載用電子制御装置を構成すると、図２のようになる。なお、車載用電子制御装置としては、車載エンジンを制御するエンジン制御装置、車載モータを制御するモータ制御装置、変速機を制御する変速機制御装置など、車載電源に接続され、車載機器を制御する電子制御装置であればいずれであっても良い。
Hereinafter, description will be made with reference to the drawings.
Simply configure the in-vehicle electronic control device independently of the negative surge protection circuit (Z21, Z22, D21, D25), diode OR circuit (D22, D23), and short-circuit fault countermeasure (D24) of VBatt power supply path components. Then, it becomes like FIG. The on-vehicle electronic control device is connected to an on-vehicle power source and controls on-vehicle equipment such as an engine control device that controls an on-vehicle engine, a motor control device that controls an on-vehicle motor, and a transmission control device that controls a transmission. Any electronic control device may be used.
整流素子Ｄ２１は、Ｖｉｇｎ電源系の負サージ保護、整流素子Ｄ２２，Ｄ２３は、ＶＢａｔｔ電源・Ｖｉｇｎ電源のＯＲ入力、整流素子Ｄ２４，Ｄ２５は、ＶＢａｔｔ電源系の負サージ保護と、ＶＢａｔｔ電源経路部品のショート故障（１次故障）の保証、ツェナーダイオードＺ２１は、Ｖｉｇｎ電源系の負サージ保護、ツェナーダイオードＺ２２は、ＶＢａｔｔ電源系の負サージ保護を行う。 The rectifier element D21 is a negative surge protection for the Vign power supply system, the rectifier elements D22 and D23 are OR inputs of the VBatt power supply / Vign power supply, the rectifier elements D24 and D25 are the negative surge protection for the VBatt power supply system, and the VBatt power supply path component. The short-circuit failure (primary failure) guarantee, the Zener diode Z21 performs negative surge protection of the Vign power supply system, and the Zener diode Z22 performs negative surge protection of the VBatt power supply system.
このように構成した場合、負サージ保護回路、ダイオードＯＲ回路、ＶＢａｔｔ電源経路部品のショート故障（１次故障）の保証回路がそれぞれ独立して構成されるため部品点数（製造工数）過多、部品材料費過多、部品実装面積率過多の問題が生じる。 When configured in this way, the negative surge protection circuit, diode OR circuit, and VBatt power supply path component short circuit failure (primary failure) guarantee circuit are configured independently, so there are too many parts (manufacturing man-hours), component materials The problem of excessive cost and excessive component mounting area ratio arises.
以下、本発明の実施例による車載用電子制御装置を図１により説明する。
電子制御装置の電源として車載用電源であるBatteryがあり、Batteryから電子制御装置のＶＢａｔｔ端子１へは直接接続され、Ｖｉｇｎ端子２へは車両のイグニッションスイッチを経由して接続される。ＶＢａｔｔ端子１の端子コンデンサＣ２，Ｃ３、Ｖｉｇｎ端子２の端子コンデンサＣ１が接続される。ＶＢａｔｔ端子１とＶｉｇｎ端子２からのＯＲ入力回路としてツェナーダイオードＺ１２，整流素子Ｄ１２が設置される。またＶＢａｔｔ系回路の負サージ保護回路として整流素子Ｄ１１，整流素子Ｄ１２，ツェナーダイオードＺ１２が設置される。さらにＶｉｇｎ系回路の負サージ保護回路として整流素子Ｄ１１，ツェナーダイオードＺ１２が設置される。図１中の矢印は、負サージ保護の際の電圧クランプの作用を表している。また、ＶＢａｔｔ電源経路部品のショート故障の対策として整流素子Ｄ１１または整流素子Ｄ１２が共用される。レギュレータＩＣであるＩＣ１の入力電源平滑用コンデンサとしてＣ４，Ｃ５，Ｃ６が設置される。
Hereinafter, an in-vehicle electronic control apparatus according to an embodiment of the present invention will be described with reference to FIG.
As a power source for the electronic control device, there is a battery which is a vehicle-mounted power source. The battery is directly connected to the VBatt terminal 1 of the electronic control device, and is connected to the Vign terminal 2 via an ignition switch of the vehicle. The terminal capacitors C2 and C3 of the VBatt terminal 1 and the terminal capacitor C1 of the Vign terminal 2 are connected. As an OR input circuit from the VBatt terminal 1 and the Vign terminal 2, a Zener diode Z12 and a rectifier element D12 are installed. Further, a rectifying element D11, a rectifying element D12, and a Zener diode Z12 are installed as a negative surge protection circuit for the VBatt system circuit. Further, a rectifying element D11 and a Zener diode Z12 are installed as a negative surge protection circuit for the Vign system circuit. The arrow in FIG. 1 represents the action of the voltage clamp during negative surge protection. Further, the rectifying element D11 or the rectifying element D12 is shared as a countermeasure against a short circuit failure in the VBatt power supply path component. C4, C5, and C6 are installed as input power supply smoothing capacitors for IC1, which is a regulator IC.
ここで、整流素子Ｄ１は、ＶＢａｔｔ電源系・Ｖｉｇｎ電源系共用の負サージ保護、及びＶＢａｔｔ電源経路部品のショート故障（１次故障）の保証をする。また、整流素子Ｄ２は、ＶＢａｔｔ電源・Ｖｉｇｎ電源のＯＲ、及びＶＢａｔｔ電源系の負サージ保護、ＶＢａｔｔ電源経路部品のショート故障（１次故障）の保証をする。また、ツェナーダイオードＺ１１は、Ｖｉｇｎ電源系の負サージ保護を行う。また、ツェナーダイオードＺ１２は、ＶＢａｔｔ電源・Ｖｉｇｎ電源のＯＲ、及びＶＢａｔｔ電源系の負サージ保護を行う。また、定電圧生成回路ＩＣ１は、ＶＢａｔｔ電源・Ｖｉｇｎ電源からのＯＲ入力を得て、電子制御装置中の複数の回路がそれぞれ必要とする電圧を生成する。 Here, the rectifier element D1 guarantees the negative surge protection common to the VBatt power supply system and the Vign power supply system, and short circuit failure (primary failure) of the VBatt power supply path components. Further, the rectifying element D2 guarantees the OR of the VBatt power supply / Vign power supply, the negative surge protection of the VBatt power supply system, and the short failure (primary failure) of the VBatt power supply path component. The Zener diode Z11 provides negative surge protection for the Vign power supply system. The zener diode Z12 performs OR of the VBatt power supply / Vign power supply and negative surge protection of the VBatt power supply system. In addition, the constant voltage generation circuit IC1 obtains an OR input from the VBatt power source and the Vign power source, and generates voltages required by a plurality of circuits in the electronic control device.
これらの構成により従来同等の負サージ保護、ＶＢａｔｔとＶｉｇｎのＯＲ及びＶＢａｔｔ電源経路部品のショート故障（１次故障）の保証がされた上で、電子制御装置の内部電源として、ＶＢａｔｔ系回路、Ｖｉｇｎ系回路、ＰＶｃｃ系回路、Ｖｃｃ系回路の各回路ブロックへ分岐・分配される形態である。 With these configurations, the same negative surge protection as before, the OR of VBatt and Vign and the short-circuit failure (primary failure) of the VBatt power supply path components are guaranteed, and the VBatt system circuit, Vign as the internal power supply of the electronic control unit In this configuration, branching / distribution is made to each circuit block of the system circuit, the PVcc system circuit, and the Vcc system circuit.
本実施例は、ダイオードＯＲ回路の構成を、ツェナーダイオードと整流ダイオードのＯＲ回路構成とし、ツェナーダイオード側の負サージ保護回路を削減し、さらに整流ダイオード側の負サージ保護回路のツェナーダイオードをＯＲ回路の整流ダイオードと直列で設置し、負サージ保護回路のツェナーダイオードとＯＲ回路の整流ダイオード間に負サージ保護回路の整流ダイオードを還流方向に設置することで、還流方向に設置した整流ダイオードが、ＯＲ回路の両側（ツェナーダイオード側及び整流ダイオード側）へ作用するようにしたものである。 In this embodiment, the configuration of the diode OR circuit is an OR circuit configuration of a Zener diode and a rectifier diode, the negative surge protection circuit on the Zener diode side is reduced, and the Zener diode of the negative surge protection circuit on the rectifier diode side is further ORed. The rectifier diode installed in the return direction is ORed by installing the rectifier diode of the negative surge protection circuit in the return direction between the Zener diode of the negative surge protection circuit and the rectifier diode of the OR circuit. It acts on both sides (the Zener diode side and the rectifier diode side) of the circuit.
本発明によれば、ＶＢａｔｔ電源とＶｉｇｎ電源のＯＲ回路と、ＶＢａｔｔ電源系とＶｉｇｎ電源系の負サージ保護回路及び、電源入力回路が多重系と成ることに起因する、車両ユーザーの操作でＯＦＦができないＶＢａｔｔ電源経路部品のショート故障（１次故障）の保証回路を統合することができるので、従来技術と同等の負サージ保護性能を維持した上で、部品点数（製造工数）低減、部品材料費低減、部品実装面積率低減できるという効果を奏する。 According to the present invention, the OR circuit of the VBatt power source and the Vign power source, the negative surge protection circuit of the VBatt power source system and the Vign power source system, and the power source input circuit are multiplexed. Since it is possible to integrate a short circuit failure (primary failure) guarantee circuit for VBatt power supply path components that cannot be performed, while maintaining the same negative surge protection performance as the conventional technology, the number of parts (manufacturing man-hours) is reduced, and parts material costs It is possible to reduce the component mounting area ratio.
１ ＶＢａｔｔ端子
２ Ｖｉｇｎ端子
Ｄ１１，Ｄ１２ 整流素子
Ｚ１１，Ｚ１２ ツェナーダイオード
1 VBatt terminal 2 Vign terminals D11, D12 Rectifier elements Z11, Z12 Zener diode
Claims (3)
外部で前記車載電源に直結して接続される第一の端子と、
外部で車両のイグニッションキーを介して前記車載電源に接続される第二の端子と、
前記第一の端子と前記定電圧生成回路の入力端子とを接続する第一の電源供給線と、
前記第二の端子と前記入力端子とを接続する第二の電源供給線と、
前記第一の電源供給線に順方向に直列接続された第一のツェナーダイオードと、前記第二の電源供給線に順方向に直列接続された第二のツェナーダイオードと、前記第二の電源供給線に前記第二のツェナーダイオードよりも前記入力端子側に直列接続された第一の整流素子と、前記第二のツェナーダイオードと前記第一の整流素子間と、グラウンドとの間に逆方向に直列接続された第二の整流素子と、を有する車載用電子制御装置。 An in-vehicle electronic control device including a constant voltage generation circuit that generates a constant voltage using an input voltage from an external connection terminal connected to an in-vehicle power source,
A first terminal that is directly connected and connected to the in-vehicle power supply externally;
A second terminal externally connected to the in-vehicle power source via the vehicle ignition key;
A first power supply line connecting the first terminal and the input terminal of the constant voltage generation circuit;
A second power supply line connecting the second terminal and the input terminal;
A first Zener diode connected in series in the forward direction to the first power supply line; a second Zener diode connected in series in the forward direction to the second power supply line; and the second power supply. A first rectifier element connected in series to the input terminal side of the line from the second Zener diode, and between the second Zener diode and the first rectifier element and in the reverse direction between the ground A vehicle-mounted electronic control device having a second rectifying element connected in series.
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| JPS5831738U (en) * | 1981-08-21 | 1983-03-02 | 株式会社日立製作所 | Power supply circuit for automotive electronic equipment |
| JPH0343817Y2 (en) * | 1986-11-15 | 1991-09-13 | ||
| DE4433045A1 (en) * | 1994-09-16 | 1996-03-21 | Bosch Gmbh Robert | Electronic circuit for commercial vehicle airbag system |
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