TWI810065B - Anti-static electricity protection circuit structure for network signal bus of electronic control unit - Google Patents

Anti-static electricity protection circuit structure for network signal bus of electronic control unit Download PDF

Info

Publication number
TWI810065B
TWI810065B TW111134652A TW111134652A TWI810065B TW I810065 B TWI810065 B TW I810065B TW 111134652 A TW111134652 A TW 111134652A TW 111134652 A TW111134652 A TW 111134652A TW I810065 B TWI810065 B TW I810065B
Authority
TW
Taiwan
Prior art keywords
bus
protection circuit
lin
control unit
electronic control
Prior art date
Application number
TW111134652A
Other languages
Chinese (zh)
Other versions
TW202411096A (en
Inventor
張右
Original Assignee
英業達股份有限公司
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 英業達股份有限公司 filed Critical 英業達股份有限公司
Priority to TW111134652A priority Critical patent/TWI810065B/en
Application granted granted Critical
Publication of TWI810065B publication Critical patent/TWI810065B/en
Publication of TW202411096A publication Critical patent/TW202411096A/en

Links

Images

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

A anti-static electricity protection circuit structure is applied for network signal bus of an electronic control unit, and includes a CAN Bus protection circuit and a LIN bus protection circuit. The CAN Bus protection circuit is electrically connected an ECU through a CAN bus signal transceiver, and electrically connected the CAN bus signal transceiver, a common-mode inductance, and a first TVS diode in sequence and then grounded. The LIN bus protection circuit is electrically connected to a LIN bus signal transmission circuit, which is electrically connected a LIN bus signal input end, a LIN bus signal transceiver and the ECU in sequence. An end of a second TVS diode is connected to a contact of LIN bus signal transmission circuit between the LIN bus signal input end and the LIN bus signal transceiver, and the other end of the second TVS diode is grounded.

Description

用於電子控制單元之網路信號總線之抗靜電保護電路結構Anti-static protection circuit structure for network signal bus of electronic control unit

本發明係有關於一種抗靜電保護電路結構，尤其是指一種用於電子控制單元之網路信號總線之抗靜電保護電路結構。The present invention relates to an antistatic protection circuit structure, in particular to an antistatic protection circuit structure used for a network signal bus of an electronic control unit.

靜電是一種暫時或長久性聚集一物質，並且受周圍高阻值介質所阻隔，因而無法自該物質流動出的靜止狀態電荷群。一旦這些電荷群大量累積而造成電位能增加，且高阻值介質的隔絕條件產生變化，譬如當有導電介質靠近所接觸該物質時，就可能發生空氣放電或接觸放電現象，導致在該物質上所累積的電荷經由導電介質而釋放至另一物質。Static electricity is a temporary or permanent accumulation of a substance, and is blocked by the surrounding high-resistance medium, so it cannot flow out of the static state charge group from the substance. Once a large number of these charge groups accumulate to increase the potential energy, and the isolation conditions of the high-resistance medium change, for example, when a conductive medium is close to the substance it is in contact with, air discharge or contact discharge may occur, resulting in a discharge on the substance. The accumulated charges are released to another substance through the conductive medium.

另一方面，一般車輛多半具有安裝於車內的電子控制單元（electronic control unit; ECU）裝置（譬如車用電腦或其周邊控制裝置），由於大多數的車輛都是金屬殼體所包覆，在金屬屏蔽效應的作用下，對於內嵌於車內的電子裝置有一定的保護作用。雖然如此，大部分的輪胎都是由絕緣的橡膠所組成，當車體接收自環境中其他物質所釋放的電荷時，由於無法藉由橡膠製成的輪胎而真正接地使屬殼體所累積的電荷進一步再流向地表，因此，仍有可能在金屬殼體上累積並殘留大量的電荷。On the other hand, most general vehicles have an electronic control unit (ECU) device (such as a vehicle computer or its peripheral control device) installed in the vehicle. Since most vehicles are covered by metal shells, Under the action of the metal shielding effect, it has a certain protective effect on the electronic devices embedded in the car. Even so, most of the tires are made of insulating rubber. When the car body receives the electric charge released by other substances in the environment, it cannot be truly grounded by the tire made of rubber, so that the accumulated charge of the car body The charge further flows to the surface, so it is still possible to accumulate and retain a large amount of charge on the metal casing.

一使用者的身體或其所攜帶的物品（如鑰匙）一旦接觸到車輛的金屬殼體（如車身、車門或鑰匙孔），就可能使金屬殼體上所累積的大量電荷流向使用者的身體或其所其所攜帶的物品。當使用者或其所攜帶的物品進入車內後，又靠近或接觸到ECU裝置時，就有可能對ECU裝置放電。Once the user's body or the items it carries (such as keys) touch the metal shell of the vehicle (such as the body, door or key hole), it may cause a large amount of electric charge accumulated on the metal shell to flow to the user's body or items carried by it. When the user or the articles he or she carries enters the vehicle and comes close to or touches the ECU device, it is possible to discharge the ECU device.

由於目前越來越多安裝於車內的電子控制單元（electronic control unit; ECU）裝置都具備傳輸網路信號的電路總線與器件，譬如控制區域網路總線（Control Area Network Bus; CAN Bus）與區域互聯網路總線（Local Interconnect Network Bus; LIN Bus）。一旦上述的電荷釋放至ECU裝置，輕則會造成CAN Bus與LIN Bus所傳遞的信號失真，重則可能會造成其中的重要器件（如ECU、CAN Bus信號收發器與LIN Bus信號收發器）損壞而造成無法再繼續正常地傳輸網路信號。Since more and more electronic control unit (ECU) devices installed in vehicles are equipped with circuit buses and devices for transmitting network signals, such as control area network bus (Control Area Network Bus; CAN Bus) and Local Interconnect Network Bus; LIN Bus. Once the above-mentioned charges are released to the ECU device, it will cause distortion of the signal transmitted by CAN Bus and LIN Bus, and may cause damage to important components (such as ECU, CAN Bus signal transceiver and LIN Bus signal transceiver) As a result, it is no longer possible to continue to transmit network signals normally.

為了檢驗ECU裝置在通電運作狀態下，承受靜電的能力。在現有的靜電放電（electrostatic discharge，ESD）測試規範中，以ISO 10605所規範的測試規範較廣為使用。在ISO 10605的測試規範中，會先建構一個ESD測試環境，並將該測試環境中的溫度維持在(23 3)℃，並將相對溼度維持在20%至40%。然後將一個探針放置在每個暴露表面的間隙以對ECU裝置內部空間進行空氣放電（利用空氣作為介質而非直接接觸）與接觸放電，藉以在放電後檢驗內部的元件或電路是否發生損壞或功能異常的情況，據此作為判斷ECU裝置抗靜電能力的依據。 In order to test the ability of the ECU device to withstand static electricity when it is powered on. Among the existing electrostatic discharge (electrostatic discharge, ESD) test specifications, the test specification specified by ISO 10605 is widely used. In the ISO 10605 test specification, an ESD test environment will be constructed first, and the temperature in the test environment will be maintained at (23 3) ℃, and maintain the relative humidity at 20% to 40%. Then place a probe in the gap of each exposed surface to conduct air discharge (using air as the medium instead of direct contact) and contact discharge to the internal space of the ECU device, so as to check whether the internal components or circuits are damaged or damaged after the discharge. If the function is abnormal, it is used as the basis for judging the antistatic ability of the ECU device.

有鑒於先前技術中，普遍缺乏適當的保護電路來保護ECU裝置內的網路信號總線（包含CAN Bus與LIN Bus）及其相關器件（如ECU、CAN Bus信號收發器與LIN Bus信號收發器）。導致一旦有靜電釋放至ECU裝置後，最會影響網路信號傳輸功能。據此。本發明之主要目的在於提供一種技術來保護網路信號總線（包含CAN Bus與LIN Bus）及其相關器件，使其能承受更大的放電量的靜電而不影響其網路信號傳輸功能。In view of the lack of appropriate protection circuits in the prior art to protect the network signal bus (including CAN Bus and LIN Bus) and related components (such as ECU, CAN Bus signal transceiver and LIN Bus signal transceiver) in the ECU device . As a result, once static electricity is discharged to the ECU device, it will most affect the network signal transmission function. Accordingly. The main purpose of the present invention is to provide a technology to protect the network signal bus (including CAN Bus and LIN Bus) and its related devices, so that it can withstand a larger amount of static electricity without affecting its network signal transmission function.

本發明為解決先前技術之問題，所採用之必要技術手段為提供一種用於電子控制單元之網路信號總線之抗靜電保護電路結構（以下簡稱「保護電路結構」）。保護電路結構包含一控制區域網路總線（Control Area Network Bus; CAN Bus）抗靜電保護電路與一區域互聯網路總線（Local Interconnect Network Bus; LIN Bus）抗靜電保護電路。In order to solve the problems of the prior art, the necessary technical means adopted by the present invention is to provide an antistatic protection circuit structure (hereinafter referred to as "protection circuit structure") for the network signal bus of the electronic control unit. The protection circuit structure includes a Control Area Network Bus (CAN Bus) antistatic protection circuit and a Local Interconnect Network Bus (LIN Bus) antistatic protection circuit.

CAN Bus抗靜電保護電路係經由一CAN Bus信號收發器而電性連接於一電子控制單元（Electronic Control Unit; ECU），並且包含一高電壓準位保護分支電路與一低電壓準位保護分支電路。高電壓準位保護分支電路係由CAN Bus信號收發器之一高電位接腳（CANH）依序電性連接於一共模電感與一第一瞬態電壓抑制（transient voltage suppressor; TVS）二極體後接地。低電壓準位保護分支電路係由CAN Bus信號收發器之一低電位接腳（CANL）依序電性連接共模電感與第一TVS二極體後接地。The CAN Bus anti-static protection circuit is electrically connected to an electronic control unit (Electronic Control Unit; ECU) through a CAN Bus signal transceiver, and includes a high voltage level protection branch circuit and a low voltage level protection branch circuit . The high voltage level protection branch circuit is electrically connected to a common mode inductor and a first transient voltage suppressor (TVS) diode in sequence by one of the high potential pins (CANH) of the CAN Bus signal transceiver back to ground. The low voltage level protection branch circuit is electrically connected to the common mode inductor and the first TVS diode by a low potential pin (CANL) of the CAN Bus signal transceiver, and then grounded.

LIN Bus抗靜電保護電路係電性連接於一LIN Bus信號傳輸電路， LIN Bus信號傳輸電路係自一LIN Bus信號輸入端依序經由一LIN Bus信號收發器而電性接於ECU，該LIN Bus抗靜電保護電路包含一第二TVS二極體，第二TVS二極體之一端係電性連接於該LIN Bus信號輸入端與LIN Bus信號收發器之間，第二TVS二極體之另一端係接地。The LIN Bus anti-static protection circuit is electrically connected to a LIN Bus signal transmission circuit. The LIN Bus signal transmission circuit is electrically connected to the ECU through a LIN Bus signal transceiver from a LIN Bus signal input terminal. The LIN Bus The antistatic protection circuit includes a second TVS diode, one end of the second TVS diode is electrically connected between the LIN Bus signal input terminal and the LIN Bus signal transceiver, and the other end of the second TVS diode Department of grounding.

在上述必要技術手段的基礎下，所衍生出較佳附屬技術手段中，較佳者，CAN Bus信號收發器可為TAJ1040晶片，LIN Bus信號收發器係為TAJ1027晶片，共模電感係為ACT45B系列之共模電感。針對抗靜電能力部分，較佳者，第一TVS二極體所能承受之空氣放電電壓與接觸放電電壓皆為30kV，且第二TVS二極體所能承受之空氣放電電壓與接觸放電電壓分別為15kV與8kV。On the basis of the above-mentioned necessary technical means, among the better auxiliary technical means derived, the CAN Bus signal transceiver is the TAJ1040 chip, the LIN Bus signal transceiver is the TAJ1027 chip, and the common mode inductor is the ACT45B series The common mode inductance. For the anti-static ability part, preferably, the air discharge voltage and contact discharge voltage that the first TVS diode can withstand are both 30kV, and the air discharge voltage and contact discharge voltage that the second TVS diode can withstand are respectively 15kV and 8kV.

承上所述，由於在本發明所提供之電子控制單元之網路信號總線之抗靜電保護電路結構中，係分別在CAN Bus信號收發器後以及LIN Bus信號傳輸電路中，額外電性連接一CAN Bus抗靜電保護電路與一LIN Bus抗靜電保護電路，並在CAN Bus抗靜電保護電路與一LIN Bus抗靜電保護電路分別設置第一TVS二極體與第二TVS二極體。其中，由於CAN Bus傳送的是差分信號，還額外設置一共模電感。藉由上述手段，明顯可大幅提升對於網路信號總線（包含CAN Bus與LIN Bus）的靜電承受能力，讓其相關器件（如ECU、CAN Bus信號收發器與LIN Bus信號收發器）得到保護而更不易損壞。As mentioned above, because in the antistatic protection circuit structure of the network signal bus of the electronic control unit provided by the present invention, an additional electrical connection is made after the CAN Bus signal transceiver and in the LIN Bus signal transmission circuit. A CAN Bus antistatic protection circuit and a LIN Bus antistatic protection circuit, and a first TVS diode and a second TVS diode are respectively arranged in the CAN Bus antistatic protection circuit and a LIN Bus antistatic protection circuit. Wherein, since the CAN Bus transmits differential signals, an additional common mode inductor is provided. By means of the above means, the static electricity withstand capability of the network signal bus (including CAN Bus and LIN Bus) can be significantly improved, and its related devices (such as ECU, CAN Bus signal transceiver and LIN Bus signal transceiver) can be protected. Less prone to damage.

由於本發明所提供之電子裝置之抗靜電保護電路結構，可廣泛運用於保護各種電子控制單元之網路信號總線及其相關元件。在相關元件的等效元件或等效電路的置換選擇上，皆可據此做出種種局部性的調整與改良，其組合實施方式更是不勝枚舉，故在此不再一一贅述，僅列舉其中較佳的一個實施例來加以具體說明。此外，在各實施例中的圖式均採用非常簡化的形式，僅用以方便、明晰地輔助說明本發明實施例的目的與功效。Due to the antistatic protection circuit structure of the electronic device provided by the present invention, it can be widely used to protect the network signal bus and related components of various electronic control units. Various local adjustments and improvements can be made on the basis of the replacement selection of equivalent components or equivalent circuits of related components, and the combination implementation methods are too numerous to enumerate, so they will not be repeated here. A preferred embodiment will be listed for specific description. In addition, the diagrams in each embodiment are in a very simplified form, and are only used to facilitate and clearly illustrate the purpose and function of the embodiment of the present invention.

請參閱第一圖，其係顯本發明所提供之一種用於電子控制單元之網路信號總線之抗靜電保護電路結構之功能方塊圖。如第一圖所示，一種用於電子控制單元之網路信號總線之抗靜電保護電路結構（以下簡稱「保護電路結構」）100包含一控制區域網路總線（Control Area Network Bus; CAN Bus）抗靜電保護電路（以下簡稱「CAN Bus保護電路」）1與一區域互聯網路總線（Local Interconnect Network Bus; LIN Bus）抗靜電保護電路（以下簡稱「LIN Bus保護電路」）2。Please refer to the first figure, which is a functional block diagram showing the structure of an antistatic protection circuit for the network signal bus of the electronic control unit provided by the present invention. As shown in the first figure, an antistatic protection circuit structure (hereinafter referred to as "protection circuit structure") 100 for the network signal bus of an electronic control unit includes a control area network bus (Control Area Network Bus; CAN Bus) An antistatic protection circuit (hereinafter referred to as "CAN Bus protection circuit") 1 and a Local Interconnect Network Bus (LIN Bus) antistatic protection circuit (hereinafter referred to as "LIN Bus protection circuit") 2 .

CAN Bus保護電路1係經由一CAN Bus信號收發器200而電性連接於一電子控制單元（Electronic Control Unit; ECU）300，並且包含一共模電感11、一第一TVS二極體12、一高電壓準位保護分支電路HVP與一低電壓準位保護分支電路LVP。LIN Bus保護電路2係電性連接於一LIN Bus信號傳輸電路LB，並且包含一第二TVS二極體21。LIN Bus信號傳輸電路LB係自一LIN Bus信號輸入端400經由一LIN Bus信號收發器500而電性接於ECU 300。The CAN Bus protection circuit 1 is electrically connected to an Electronic Control Unit (ECU) 300 via a CAN Bus signal transceiver 200, and includes a common mode inductor 11, a first TVS diode 12, a high The voltage level protection branch circuit HVP and a low voltage level protection branch circuit LVP. The LIN Bus protection circuit 2 is electrically connected to a LIN Bus signal transmission circuit LB, and includes a second TVS diode 21 . The LIN Bus signal transmission circuit LB is electrically connected to the ECU 300 from a LIN Bus signal input terminal 400 via a LIN Bus signal transceiver 500 .

請一併參閱第一圖與第二圖，其中第二圖係顯示本發明較佳實施例中的CAN Bus保護電路與周邊相關電路與器件之電路圖。如第一圖與第二圖所示，由於CAN Bus信號是屬於一種差分信號，所以CAN Bus信號收發器200包含一高電位接腳CANH與一低電位接腳CANL。Please refer to the first figure and the second figure together, wherein the second figure is a circuit diagram showing the CAN Bus protection circuit and peripheral related circuits and devices in a preferred embodiment of the present invention. As shown in the first and second figures, since the CAN Bus signal is a differential signal, the CAN Bus signal transceiver 200 includes a high potential pin CANH and a low potential pin CANL.

高電壓準位保護分支電路HVP係由CAN Bus信號收發器200之高電位接腳CANH依序電性連接於共模電感11與第一TVS二極體12後接地。相似地，低電壓準位保護分支電路LVP係由CAN Bus信號收發器200之低電位接腳CANL依序電性連接於共模電感11與第一TVS二極體12後接地。The high voltage level protection branch circuit HVP is electrically connected to the common mode inductor 11 and the first TVS diode 12 by the high potential pin CANH of the CAN Bus signal transceiver 200 and then grounded. Similarly, the low voltage level protection branch circuit LVP is sequentially electrically connected to the common mode inductor 11 and the first TVS diode 12 by the low potential pin CANL of the CAN Bus signal transceiver 200 and then grounded.

較佳者，CAN Bus信號收發器200可為TAJ1040晶片。第一TVS二極體所能承受之空氣放電電壓與接觸放電電壓皆為30kV。共模電感係為ACT45B系列之共模電感。Preferably, the CAN Bus signal transceiver 200 can be a TAJ1040 chip. Both the air discharge voltage and the contact discharge voltage that the first TVS diode can withstand are 30kV. The common mode inductor is the common mode inductor of ACT45B series.

請一併參閱第一圖與第三圖，其中第三圖係顯示本發明較佳實施例中的LIN Bus保護電路與周邊相關電路與器件之電路圖。如第一圖與第三圖所示，在LIN Bus信號收發器500中，包含了一個LIN Bus信號接腳（即第三圖中元件500內部標示LIN的接腳）、一LIN Bus信號發送接腳（即第三圖中元件500內部標示TXD的接腳）與一LIN Bus信號接收接腳（即第三圖中元件500內部標示RXD的接腳）。LIN Bus信號傳輸電路LB係自LIN Bus信號輸入端400經由一LIN Bus信號接腳而電性接於LIN Bus信號收發器500，再分別經由LIN Bus信號發送接腳與LIN Bus信號接收接腳而電性接於ECU 300。Please refer to the first figure and the third figure together, wherein the third figure is a circuit diagram showing the LIN Bus protection circuit and peripheral related circuits and devices in a preferred embodiment of the present invention. As shown in the first and third figures, the LIN Bus signal transceiver 500 includes a LIN Bus signal pin (that is, the pin marked LIN inside the component 500 in the third figure), a LIN Bus signal sending pin pin (that is, the pin marked TXD inside the component 500 in the third figure) and a LIN Bus signal receiving pin (that is, the pin marked RXD inside the component 500 in the third figure). The LIN Bus signal transmission circuit LB is electrically connected to the LIN Bus signal transceiver 500 from the LIN Bus signal input terminal 400 through a LIN Bus signal pin, and then through the LIN Bus signal sending pin and the LIN Bus signal receiving pin respectively. Electrically connected to ECU 300 .

第二TVS二極體21之一端係電性連接於該LIN Bus信號輸入端400與LIN Bus信號收發器500之間，第二TVS二極體21之另一端係接地。較佳者，LIN Bus信號收發器可為TAJ1027晶片，且第二TVS二極體所能承受之空氣放電電壓與接觸放電電壓分別為15kV與8kV。One end of the second TVS diode 21 is electrically connected between the LIN Bus signal input end 400 and the LIN Bus signal transceiver 500 , and the other end of the second TVS diode 21 is grounded. Preferably, the LIN Bus signal transceiver can be a TAJ1027 chip, and the air discharge voltage and contact discharge voltage that the second TVS diode can withstand are 15kV and 8kV respectively.

由於高電位接腳CANH、低電位接腳CANL在受靜電干擾或衝擊時的CAN Bus信號傳輸穩定性，以及LIN Bus信號接腳（即第三圖中元件500內部標示LIN的接腳）受靜電干擾或衝擊時的LIN Bus信號傳輸穩定性決定了ECU 300之網路信號總線整體的抗靜電能力。Due to the stability of the CAN Bus signal transmission when the high potential pin CANH and the low potential pin CANL are subject to static interference or impact, and the LIN Bus signal pin (that is, the pin marked LIN inside the component 500 in the third figure) is subject to static electricity The stability of LIN Bus signal transmission during interference or impact determines the overall antistatic capability of the network signal bus of ECU 300 .

此外，由於ISO 10605的測試規範中，會在ECU 300運作期間，在高電位接腳CANH、低電位接腳CANL、LIN Bus信號接腳與殼體的間隙處，以接觸放電的方式釋放 4kV至 8kV不等的靜電，以空氣放電的方式釋放 4kV至 25kV不等的靜電；因此，在與高電位接腳CANH、低電位接腳CANL、LIN Bus信號接腳等處直接或間接電性連接於保護電路才能提供直接而有效的保護效果。藉由上述手段，明顯可大幅提升對於網路信號總線（包含CAN Bus與LIN Bus）的靜電承受能力，讓其相關器件（如ECU 300、CAN Bus信號收發器200與LIN Bus信號收發器500）得到保護而更不易損壞。 In addition, due to the ISO 10605 test specification, during the operation of the ECU 300, the high-potential pin CANH, the low-potential pin CANL, the gap between the LIN Bus signal pin and the housing, will discharge in the form of contact discharge. 4kV to Static electricity ranging from 8kV is released by air discharge 4kV to Static electricity ranging from 25kV; therefore, direct or indirect electrical connection to the protection circuit with the high potential pin CANH, low potential pin CANL, LIN Bus signal pin, etc. can provide direct and effective protection. By means of the above means, the electrostatic tolerance of the network signal bus (including CAN Bus and LIN Bus) can be significantly improved, allowing related devices (such as ECU 300, CAN Bus signal transceiver 200 and LIN Bus signal transceiver 500) protected from damage.

綜合上所述，藉由上述手段，明顯可大幅提升對於網路信號總線（包含CAN Bus與LIN Bus）的靜電承受能力，讓其相關器件（如ECU 300、CAN Bus信號收發器200與LIN Bus信號收發器500）得到保護而更不易損壞。 To sum up, by means of the above means, the electrostatic tolerance of the network signal bus (including CAN Bus and LIN Bus) can be significantly improved, allowing related devices (such as ECU 300, CAN Bus signal transceiver 200 and LIN Bus signal transceiver 500) are protected from damage.

藉由以上較佳具體實施例之詳述，係希望能更加清楚描述本發明之特徵與精神，而並非以上述所揭露的較佳具體實施例來對本發明之範疇加以限制。相反地，其目的是希望能涵蓋各種改變及具相等性的安排於本發明所欲申請之專利範圍的範疇內。Through the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various changes and equivalent arrangements within the scope of the claimed patent scope of the present invention.

100:保護電路結構 100: Protection circuit structure

200:CAN Bus信號收發器 200: CAN Bus signal transceiver

300:ECU 300:ECU

400:LIN Bus信號輸入端 400: LIN Bus signal input terminal

500:LIN Bus信號收發器 500: LIN Bus signal transceiver

1:CAN Bus(抗靜電)保護電路 1: CAN Bus (anti-static) protection circuit

11:共模電感 11: Common mode inductance

12:第一TVS二極體 12: The first TVS diode

2:LIN Bus(抗靜電)保護電路 2: LIN Bus (anti-static) protection circuit

21:第二TVS二極體 21: Second TVS diode

HVP:高電壓準位保護分支電路 HVP: High Voltage Level Protection Branch Circuit

LVP:低電壓準位保護分支電路 LVP: low voltage level protection branch circuit

LB:LIN Bus信號傳輸電路 LB: LIN Bus signal transmission circuit

CANH:高電位接腳 CANH: high potential pin

CANL:低電位接腳 CANL: low potential pin

C25,C30:電容 C25, C30: capacitance

R8~R10:電阻 R8~R10: resistance

STB:待命模式控制引腳 STB: standby mode control pin

SPLIT:共模穩定引腳 SPLIT: common mode stability pin

Vcc:供電引腳(5伏特) Vcc: power supply pin (5 volts)

Sys_5V:系統5伏特供電電源 Sys_5V: system 5 volt power supply

Sys_12V:系統12伏特供電電源 Sys_12V: system 12 volt power supply

B1:磁珠 B1: magnetic beads

NC:空腳 NC: Empty foot

VBAT:供電引腳(12伏特) VBAT: Power supply pin (12 volts)

SLP_N:高低電位模式控制引腳 SLP_N: high and low potential mode control pin

第一圖係顯本發明所提供之一種用於電子控制單元之網路信號總線之抗靜電保護電路結構之功能方塊圖； 第二圖係顯示本發明較佳實施例中的CAN Bus保護電路與周邊相關電路與器件之電路圖；以及 第三圖係顯示本發明較佳實施例中的LIN Bus保護電路與周邊相關電路與器件之電路圖。 The first figure is a functional block diagram showing the antistatic protection circuit structure of the network signal bus of the electronic control unit provided by the present invention; The second figure shows the circuit diagram of the CAN Bus protection circuit and peripheral related circuits and devices in the preferred embodiment of the present invention; and The third figure is a circuit diagram showing the LIN Bus protection circuit and peripheral related circuits and devices in a preferred embodiment of the present invention.

100:保護電路結構 100: Protection circuit structure

200:CAN Bus信號收發器 200: CAN Bus signal transceiver

300:ECU 300:ECU

400:LIN Bus信號輸入端 400: LIN Bus signal input terminal

500:LIN Bus信號收發器 500: LIN Bus signal transceiver

1:CAN Bus(抗靜電)保護電路 1: CAN Bus (anti-static) protection circuit

11:共模電感 11: Common mode inductance

12:第一TVS二極體 12: The first TVS diode

2:LIN Bus(抗靜電)保護電路 2: LIN Bus (anti-static) protection circuit

21:第二TVS二極體 21: Second TVS diode

HVP:高電壓準位保護分支電路 HVP: High Voltage Level Protection Branch Circuit

LVP:低電壓準位保護分支電路 LVP: low voltage level protection branch circuit

LB:LIN Bus信號傳輸電路 LB: LIN Bus signal transmission circuit

Claims (6)

一種用於電子控制單元之網路信號總線之抗靜電保護電路結構，包含： 一控制區域網路總線（Control Area Network Bus; CAN Bus）抗靜電保護電路，係經由一CAN Bus信號收發器而電性連接於一電子控制單元（Electronic Control Unit; ECU），並且包含： 一高電壓準位保護分支電路，係由該CAN Bus信號收發器之一高電位接腳依序電性連接於一共模電感與一第一瞬態電壓抑制（transient voltage suppressor; TVS）二極體後接地；以及 一低電壓準位保護分支電路，係由該CAN Bus信號收發器之一低電位接腳依序電性連接該共模電感與該第一TVS二極體後接地；以及 一區域互聯網路總線（Local Interconnect Network Bus; LIN Bus）抗靜電保護電路，係電性連接於一LIN Bus信號傳輸電路，該LIN Bus信號傳輸電路係自一LIN Bus信號輸入端依序經由一LIN Bus信號收發器而電性接於該ECU，該LIN Bus抗靜電保護電路包含一第二TVS二極體，該第二TVS二極體之一端係電性連接於該LIN Bus信號輸入端與該LIN Bus信號收發器之間，該第二TVS二極體之另一端係接地。 An antistatic protection circuit structure for a network signal bus of an electronic control unit, comprising: A control area network bus (Control Area Network Bus; CAN Bus) anti-static protection circuit is electrically connected to an electronic control unit (Electronic Control Unit; ECU) through a CAN Bus signal transceiver, and includes: A high voltage level protection branch circuit is sequentially electrically connected to a common mode inductor and a first transient voltage suppressor (TVS) diode by one of the high potential pins of the CAN Bus signal transceiver rear ground; and A low-voltage level protection branch circuit is electrically connected to the common-mode inductor and the first TVS diode by a low-potential pin of the CAN Bus signal transceiver, and then grounded; and A Local Interconnect Network Bus (LIN Bus) anti-static protection circuit is electrically connected to a LIN Bus signal transmission circuit, and the LIN Bus signal transmission circuit is sequentially routed from a LIN Bus signal input terminal to a LIN The Bus signal transceiver is electrically connected to the ECU. The LIN Bus antistatic protection circuit includes a second TVS diode, and one end of the second TVS diode is electrically connected to the LIN Bus signal input terminal and the LIN Bus signal input terminal. Between the LIN Bus signal transceivers, the other end of the second TVS diode is grounded. 如請求項1所述之用於電子控制單元之網路信號總線之抗靜電保護電路結構，其中，該CAN Bus信號收發器係為TAJ1040晶片。The antistatic protection circuit structure for the network signal bus of the electronic control unit as described in claim 1, wherein the CAN Bus signal transceiver is a TAJ1040 chip. 如請求項1所述之用於電子控制單元之網路信號總線之抗靜電保護電路結構，其中，該LIN Bus信號收發器係為TAJ1027晶片。The antistatic protection circuit structure for the network signal bus of the electronic control unit as described in claim 1, wherein the LIN Bus signal transceiver is a TAJ1027 chip. 如請求項1所述之用於電子控制單元之網路信號總線之抗靜電保護電路結構，其中，該第一TVS二極體所能承受之空氣放電電壓與接觸放電電壓皆為30kV。The antistatic protection circuit structure for the network signal bus of the electronic control unit according to claim 1, wherein the air discharge voltage and the contact discharge voltage that the first TVS diode can withstand are both 30kV. 如請求項1所述之用於電子控制單元之網路信號總線之抗靜電保護電路結構，其中，該第二TVS二極體所能承受之空氣放電電壓與接觸放電電壓分別為15kV與8kV。The antistatic protection circuit structure for the network signal bus of the electronic control unit as described in Claim 1, wherein the air discharge voltage and the contact discharge voltage that the second TVS diode can withstand are 15kV and 8kV respectively. 如請求項1所述之用於電子控制單元之網路信號總線之抗靜電保護電路結構，其中，該共模電感係為ACT45B系列之共模電感。The antistatic protection circuit structure for the network signal bus of the electronic control unit as described in claim 1, wherein the common mode inductor is a common mode inductor of the ACT45B series.
TW111134652A 2022-09-14 2022-09-14 Anti-static electricity protection circuit structure for network signal bus of electronic control unit TWI810065B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW111134652A TWI810065B (en) 2022-09-14 2022-09-14 Anti-static electricity protection circuit structure for network signal bus of electronic control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW111134652A TWI810065B (en) 2022-09-14 2022-09-14 Anti-static electricity protection circuit structure for network signal bus of electronic control unit

Publications (2)

Publication Number Publication Date
TWI810065B true TWI810065B (en) 2023-07-21
TW202411096A TW202411096A (en) 2024-03-16

Family

ID=88149538

Family Applications (1)

Application Number Title Priority Date Filing Date
TW111134652A TWI810065B (en) 2022-09-14 2022-09-14 Anti-static electricity protection circuit structure for network signal bus of electronic control unit

Country Status (1)

Country Link
TW (1) TWI810065B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203713581U (en) * 2014-02-26 2014-07-16 安徽合力股份有限公司 Internal combustion forklift combined instrument based on controller area network (CAN) bus
US20200274375A1 (en) * 2017-11-08 2020-08-27 Eaton Intelligent Power Limited Power distribution and circuit protection for a mobile application having a high efficiency inverter
CN114928381A (en) * 2022-06-20 2022-08-19 英业达科技有限公司 Bluetooth communication circuit and vehicle key comprising same
CN114928033A (en) * 2022-06-20 2022-08-19 英业达科技有限公司 Power supply circuit for vehicle and control circuit for vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203713581U (en) * 2014-02-26 2014-07-16 安徽合力股份有限公司 Internal combustion forklift combined instrument based on controller area network (CAN) bus
US20200274375A1 (en) * 2017-11-08 2020-08-27 Eaton Intelligent Power Limited Power distribution and circuit protection for a mobile application having a high efficiency inverter
CN114928381A (en) * 2022-06-20 2022-08-19 英业达科技有限公司 Bluetooth communication circuit and vehicle key comprising same
CN114928033A (en) * 2022-06-20 2022-08-19 英业达科技有限公司 Power supply circuit for vehicle and control circuit for vehicle

Also Published As

Publication number Publication date
TW202411096A (en) 2024-03-16

Similar Documents

Publication Publication Date Title
US7356050B2 (en) System for transmission of data on a bus
TWI441399B (en) Overvoltage protection circuit, interfacing system for providing overvoltage protection and overvoltage protection method in a data bus interface
US5995353A (en) Apparatus for discharging an electrostatic discharge via a spark gap coupled in series with a high impedance network
EP1883179B1 (en) Communication system for hazardous environments
US20040257743A1 (en) LAN magnetic interface circuit with passive ESD protection
TWI810065B (en) Anti-static electricity protection circuit structure for network signal bus of electronic control unit
US6151202A (en) Discharging electrostatic charge during hot card insertion
US7054127B1 (en) Methods and apparatus to protect against voltage surges
EP2773004B1 (en) Connection apparatus circuit and high voltage surge protection method thereof
CN115663772A (en) Antistatic protection circuit structure for network signal bus of electronic control unit
CN105324020A (en) Electrical system having galvanic isolation
JP7012254B2 (en) Communication device
JP4005794B2 (en) Electronic control unit for automobile
CN102567271B (en) Universal serial bus protection circuit
CN101989739B (en) Protective circuit
CN114866160A (en) Isolation protection circuit, module and chip of RS485 chip in acquisition terminal
CN209730809U (en) A kind of SD card electrostatic discharge protective circuit
US9343900B2 (en) Passive network for electrostatic protection of integrated circuits
US6987654B2 (en) Electrostatic discharge circuit
US20040169982A1 (en) Surge protector
JP2014083932A (en) CAN communication device
CN219204092U (en) Electromagnetic compatibility protection circuit of sensor
CN219350861U (en) Data transmission line
CN220775394U (en) Lightning protection circuit, module, circuit board and electronic equipment
Lepkowski et al. EMI/ESD protection solutions for the CAN bus