TWI821977B - Dc power transmission circuit with reverse connection protection function - Google Patents

Dc power transmission circuit with reverse connection protection function Download PDF

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TWI821977B
TWI821977B TW111113309A TW111113309A TWI821977B TW I821977 B TWI821977 B TW I821977B TW 111113309 A TW111113309 A TW 111113309A TW 111113309 A TW111113309 A TW 111113309A TW I821977 B TWI821977 B TW I821977B
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switch component
input terminal
positive
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TW202341605A (en
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邱錦裕
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神達數位股份有限公司
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Abstract

A DC power transmission circuit includes a first switch element connected electrically between a first input terminal and a positive terminal, a second switch component connected electrically between a second input terminal and the positive terminal, a third switch component connected electrically between the first input terminal and a negative terminal, and a fourth switch component electrically between the second input terminal and the negative terminal. When the first and second input terminals are coupled respectively to positive and negative electrodes of an external power source, the first and fourth switch components conduct in response respectively to first and second control signals received at the second and first input terminals; and when the first and second input terminals are coupled respectively to the negative and positive terminals of the external power source, the second and third switch components conduct in response respectively to the first and second control signals received at the second and first input terminals, such that DC power from the external power source is output between the positive and negative terminals.

Description

具有反接保護功能的直流電源傳輸電路DC power transmission circuit with reverse polarity protection function

本發明是有關於直流電源的傳輸，特別是指一種具有反接保護功能的直流電源傳輸電路。The present invention relates to the transmission of DC power, and in particular, to a DC power transmission circuit with a reverse connection protection function.

車用電源為一具有極性的直流電源，例如蓄電池，並透過分別為正極和負極的兩端輸出直流電壓，以供應車載系統所需的電力。由於車載系統通常包含有多種不同的車用電子產品且每一車用電子產品與該車用電源並未限定以特定連接介面來連接，所以組裝人員通常將車用電子產品用於接收輸入電壓的兩條方別代表Vcc與GND的連接線與另外兩條分別與車用電源的正、負極電連接的連接線，以裸線對接方式來完成車用電子產品與車用電源之間的電連接。然而，在此裸線對接過程中，組裝人員若一時不查恐容易發生錯接(反接)的情況，如此將會導致車用電子產品無法正常運作，甚至可能導致產品的燒毀。The vehicle power supply is a DC power supply with polarity, such as a battery, and outputs DC voltage through two terminals, namely the positive pole and the negative pole, to supply the power required by the vehicle system. Since vehicle systems usually include a variety of different vehicle electronic products and each vehicle electronic product is not limited to a specific connection interface to the vehicle power supply, assemblers usually use vehicle electronic products to receive input voltages. The two squares represent the connecting wires of Vcc and GND and the other two connecting wires that are electrically connected to the positive and negative poles of the vehicle power supply respectively. The electrical connection between the vehicle electronic products and the vehicle power supply is completed by bare wire docking. . However, during the bare wire docking process, if the assembly personnel do not check for a moment, they may easily cause wrong connections (reverse connections), which will cause the automotive electronic products to fail to operate normally, and may even cause the products to burn.

為了預防車用電子產品因電源極性反接所導致的毀損，車用電子產品已設計成包含有防反接保護電路，此防反接保護電路在發生反接時，會使車用電子產品與車用電源斷開，因而車用電子產品在無電源供應下而不運作(即，保持關機狀態)，藉此達成免於因反接而導致的毀損。在此情況下，對於反接的車用電子產品，組裝人員必須重新執一次正確但繁瑣的組裝。另一方面，此防反接保護電路通常使用了具有逆偏斷開特性的電子元件，例如二極體和MOS電晶體。然而，當施加於此電子元件的逆向偏壓大於其逆向崩潰電壓時，此電子元件將會從斷開狀態變成導通狀態，因而對於車用電子產品無法達成有效的反接保護。In order to prevent damage to automotive electronic products caused by reverse polarity of the power supply, automotive electronic products have been designed to include anti-reverse protection circuits. When reverse polarity occurs, this anti-reverse protection circuit will cause the automotive electronic products to The vehicle power supply is disconnected, so the vehicle electronic products do not operate without power supply (that is, remain powered off), thereby avoiding damage caused by reverse connection. In this case, for reverse-connected automotive electronic products, the assembler must perform a correct but cumbersome assembly again. On the other hand, this reverse polarity protection circuit usually uses electronic components with reverse bias disconnection characteristics, such as diodes and MOS transistors. However, when the reverse bias voltage applied to the electronic component is greater than its reverse breakdown voltage, the electronic component will change from the off state to the on state, so effective reverse connection protection cannot be achieved for automotive electronic products.

因此，在電子產品與電源之間，如何發想出一種能達成有效的反接保護且容易組裝的直流電源傳輸電路已成為相關技術領域所欲解決的議題之一。Therefore, between electronic products and power supplies, how to devise a DC power transmission circuit that can achieve effective reverse connection protection and is easy to assemble has become one of the issues to be solved in related technical fields.

因此，本發明的目的，即在提供一種直流電源傳輸電路，其能克服現有技術至少一個缺點。Therefore, an object of the present invention is to provide a DC power transmission circuit that can overcome at least one shortcoming of the prior art.

於是，本發明所提供的一種直流電源傳輸電路用於傳輸來自一外部電源的直流電源，並包含一輸入側、一輸出側、一第一開關組件、一第二開關組件、一第三開關組件、及一第四開關組件。Therefore, the invention provides a DC power transmission circuit for transmitting DC power from an external power source, and includes an input side, an output side, a first switch component, a second switch component, and a third switch component. , and a fourth switch component.

該輸入側適於電連接該外部電源以接收該直流電源並具有一第一輸入端和一第二輸入端。The input side is adapted to be electrically connected to the external power source to receive the DC power source and has a first input end and a second input end.

該輸出側用於輸出該直流電源並具有一正端和一負端。The output side is used to output the DC power supply and has a positive terminal and a negative terminal.

該第一開關組件電連接在該輸入側的該第一輸入端與該輸出側的該正端之間，具有一耦接該輸入側的該第二輸入端的第一控制端，並回應於在該第一控制端接收的一第一控制信號而導通或關斷。The first switch component is electrically connected between the first input terminal of the input side and the positive terminal of the output side, has a first control terminal coupled to the second input terminal of the input side, and responds to The first control terminal receives a first control signal to turn on or off.

該第二開關組件電連接在該輸入側的該第二輸入端與該輸出側的該正端之間，具有一耦接該輸入側的該第二輸入端的第二控制端，並回應於在該第二控制端接收的該第一控制信號1而關斷或導通。The second switch component is electrically connected between the second input terminal of the input side and the positive terminal of the output side, has a second control terminal coupled to the second input terminal of the input side, and responds to The second control terminal receives the first control signal 1 and turns off or on.

該第三開關組件電連接在該輸入側的該第一輸入端與該輸出側的該負端之間，具有一耦接該輸入側的該第一輸入端的第三控制端，並回應於在該第三控制端接收的一第二控制信號而關斷或導通。The third switch component is electrically connected between the first input terminal of the input side and the negative terminal of the output side, has a third control terminal coupled to the first input terminal of the input side, and responds to The third control terminal receives a second control signal to turn off or on.

該第四開關組件電連接在該輸入側的該第二輸入端與該輸出側的該負端之間，具有一耦接該輸入側的該第一輸入端的第四控制端，並回應於在該第四控制端接收的該第二控制信號而導通或關斷。The fourth switch component is electrically connected between the second input terminal of the input side and the negative terminal of the output side, has a fourth control terminal coupled to the first input terminal of the input side, and responds to The fourth control terminal receives the second control signal to turn on or off.

當該輸入側的該第一輸入端和該第二輸入端分別耦接該外部電源的一正極和一負極時，該第一、四開關組件導通而該第二、三開關組件關斷，以致該輸入側的該第一輸入端經由導通的該第一開關組件電連接該輸出側的該正端並且該輸入側的該第二輸入端經由導通的該第四開關組件電連接該輸出側的該負端。When the first input terminal and the second input terminal of the input side are respectively coupled to a positive pole and a negative pole of the external power supply, the first and fourth switching components are turned on and the second and third switching components are turned off, so that The first input terminal of the input side is electrically connected to the positive terminal of the output side via the conductive first switch component and the second input terminal of the input side is electrically connected to the output side via the conductive fourth switch component. the negative terminal.

當該輸入側的該第一輸入端和該第二輸入端分別耦接該外部電源的該負極和該正極時，該第二、三開關組件導通而該第一、四開關組件關斷，以致該輸入側的該第一輸入端經由導通的該第三開關組件電連接該輸出側的該負端並且該輸入側的該第二輸入端經由導通的該第二開關組件電連接該輸出側的該正端。When the first input terminal and the second input terminal of the input side are respectively coupled to the negative pole and the positive pole of the external power supply, the second and third switching components are turned on and the first and fourth switching components are turned off, so that The first input terminal of the input side is electrically connected to the negative terminal of the output side via the conductive third switch component and the second input terminal of the input side is electrically connected to the output side via the conductive second switch component. That's right.

本發明的直流電源傳輸電路中，該第一開關組件在功能及操作上相同於該第三開關組件，且該第二開關組件在功能及操作上相同於該第四開關組件。In the DC power transmission circuit of the present invention, the first switch component is the same in function and operation as the third switch component, and the second switch component is the same in function and operation as the fourth switch component.

本發明的直流電源傳輸電路中，該第一、三開關組件其中每一者包含一PMOS電晶體，且該第二、四開關組件其中每一者包含一NMOS電晶體。In the DC power transmission circuit of the present invention, each of the first and third switch components includes a PMOS transistor, and each of the second and fourth switch components includes an NMOS transistor.

本發明的功效在於：由於該第一至第四開關組件的配置與設計，無論該輸入側的該第一、二輸入端如何與該外部電源的正、負極連接均能確保在該輸出側以正確的極性輸出來自該外部電源的直流電源，藉此對於連接該輸出側的負載裝置提供反接保護功能。The effect of the present invention is that due to the configuration and design of the first to fourth switch components, no matter how the first and second input terminals on the input side are connected to the positive and negative poles of the external power supply, it can ensure that the output side is connected to the positive and negative poles. The correct polarity outputs DC power from the external power source, thereby providing reverse polarity protection for load devices connected to the output side.

在本發明被詳細描述之前，應當注意在以下的說明內容中，類似的元件是以相同的編號來表示。Before the present invention is described in detail, it should be noted that in the following description, similar elements are designated with the same numbering.

參閱圖1，示例性地繪示出本發明實施例的一種直流電源傳輸電路100，其用於將來自一外部電源200的直流電源(圖未示)傳輸至一負載裝置300，也就是說，該外部電源200所提供的該直流電源可透過該直流電源傳輸電路100不僅將該直流電源傳輸至該負載裝置300，而且同時對於該負載裝置300提供反接保護的功能。在本實施例中，該外部電源200可以是但不限於一電池模組(例如，車用蓄電池)，且該負載裝置300可以是例如但不限於一車用電子產品。該直流電源傳輸電路100包含一輸入側1、一輸出側2、一第一開關組件3、一第二開關組件4、一第三開關組件5和一第四開關組件6。Referring to FIG. 1 , a DC power transmission circuit 100 according to an embodiment of the present invention is schematically illustrated, which is used to transmit DC power (not shown) from an external power supply 200 to a load device 300 , that is to say, The DC power provided by the external power supply 200 can not only transmit the DC power to the load device 300 through the DC power transmission circuit 100, but also provide reverse polarity protection for the load device 300. In this embodiment, the external power supply 200 may be, but is not limited to, a battery module (for example, a vehicle battery), and the load device 300 may be, for example, but is not limited to, a vehicle electronic product. The DC power transmission circuit 100 includes an input side 1 , an output side 2 , a first switch component 3 , a second switch component 4 , a third switch component 5 and a fourth switch component 6 .

該輸入側1適於電連接該外部電源200以接收該直流電源，並具有一第一輸入端11和一第二輸入端12。The input side 1 is suitable for electrically connecting to the external power supply 200 to receive the DC power supply, and has a first input terminal 11 and a second input terminal 12 .

該輸出側2適於電連接該負載裝置300，並用於將該直流電源輸出至該負載裝置300，並具有一正端21和一負端22。特別要說明的是，在本實施例中，該直流電源傳輸電路100例如實施成一與該負載裝置300外部耦接的電路模組，在此情況下，該正端21與該負端22可以經由一合適的連接介面(圖未示)分別與該負載裝置300的電路電壓端(即， Vcc)和接地端(即，GND)耦接。然而，在其他實施例中，該直流電源傳輸電路100亦可被整合於該負載裝置300，在此情況下，該正端21作為該負載裝置300的電路電壓端(即， Vcc)且該負端22作為該負載裝置300的接地端(即，GND)。The output side 2 is adapted to be electrically connected to the load device 300 and used to output the DC power to the load device 300, and has a positive terminal 21 and a negative terminal 22. It should be noted that in this embodiment, the DC power transmission circuit 100 is implemented as a circuit module externally coupled to the load device 300. In this case, the positive terminal 21 and the negative terminal 22 can be connected via A suitable connection interface (not shown) is coupled to the circuit voltage terminal (ie, Vcc) and the ground terminal (ie, GND) of the load device 300 respectively. However, in other embodiments, the DC power transmission circuit 100 can also be integrated into the load device 300. In this case, the positive terminal 21 serves as the circuit voltage terminal (ie, Vcc) of the load device 300 and the negative terminal 21 serves as the circuit voltage terminal (ie, Vcc) of the load device 300. Terminal 22 serves as the ground terminal (ie, GND) of the load device 300 .

該第一開關組件3電連接在該輸入側1的該第一輸入端11與該輸出側2的該正端21之間，具有一耦接該輸入側1的該第二輸入端12的第一控制端，並回應於在該第一控制端接收的一第一控制信號(圖未示)而導通或關斷。具體而言，該第一控制信號就是在該輸入側1的該第一輸入端11所接收到的信號。The first switch component 3 is electrically connected between the first input terminal 11 of the input side 1 and the positive terminal 21 of the output side 2, and has a third input terminal coupled to the second input terminal 12 of the input side 1. A control terminal is turned on or off in response to a first control signal (not shown) received at the first control terminal. Specifically, the first control signal is the signal received at the first input terminal 11 of the input side 1 .

該第二開關組件4電連接在該輸入側1的該第二輸入端12與該輸出側2的該正端21之間，具有一耦接該輸入側1的該第二輸入端12的第二控制端，並回應於在該第二控制端接收的該第一控制信號而關斷或導通。The second switch component 4 is electrically connected between the second input terminal 12 of the input side 1 and the positive terminal 21 of the output side 2, and has a third input terminal 12 coupled to the input side 1. Two control terminals are turned off or on in response to the first control signal received at the second control terminal.

該第三開關組件5電連接在該輸入側1的該第一輸入端11與該輸出側2的該負端22之間，具有一耦接該輸入側1的該第一輸入端11的第三控制端，並回應於在該第三控制端接收的一第二控制信號(圖未示)而關斷或導通。具體而言，該第二控制信號就是在該輸入側1的該第二輸入端12所接收到的信號。The third switch component 5 is electrically connected between the first input terminal 11 of the input side 1 and the negative terminal 22 of the output side 2, and has a third switch coupled to the first input terminal 11 of the input side 1. The third control terminal is turned off or turned on in response to a second control signal (not shown) received at the third control terminal. Specifically, the second control signal is the signal received at the second input terminal 12 of the input side 1 .

該第四開關組件6電連接在該輸入側1的該第二輸入端12與該輸出側2的該負端22之間，具有一耦接該輸入側1的該第一輸入端11的第四控制端，並回應於在該第四控制端接收的該第二控制信號而導通或關斷。The fourth switch component 6 is electrically connected between the second input terminal 12 of the input side 1 and the negative terminal 22 of the output side 2, and has a third switch coupled to the first input terminal 11 of the input side 1. Four control terminals, and are turned on or off in response to the second control signal received at the fourth control terminal.

參閱圖2，在本實施例中，該第一開關組件1與該第三開關組件3在功能及操作上彼此相同且其中每一者可包含一PMOS電晶體(例如，如圖2所示的一P通道增強型MOSFET，但不以此例為限)以及一與該PMOS電晶體反向並聯的本體二極體。該第二開關組件2與該第四開關組件在功能及操作上彼此相同且其中每一者可包含一NMOS電晶體(例如，如圖2所示的一N通道增強型MOSFET，但不以此例為限)以及一與該PMOS電晶體反向並聯的本體二極體。更具體地，對於該第一開關組件3，該PMOS電晶體的源極和汲極分別耦接該輸入側1的該第一輸入端11和該輸出側2的該正端21，且該PMOS電晶體的閘極作為該第一控制端；對於該第二開關組件4，該NMOS電晶體的汲極和源極分別耦接該輸入側1的該第二輸入端12和該輸出側2的該正端21，且該NMOS電晶體的閘極作為該第二控制端；對於該第三開關組件5，該PMOS電晶體的源極和汲極分別耦接該輸入側1的該第一輸入端11和該輸出側2的該負端22，且該PMOS電晶體的閘極作為該第三控制端；及對於該第四開關組件6，該NMOS電晶體的汲極和源極分別耦接該輸入側1的該第二輸入端12和該輸出側2的該負端22，且該NMOS電晶體的閘極作為該第四控制端。在此配置下，當該第一控制信號(以下，以S1來表示)為一高準位信號時，該第一開關組件3的該PMOS電晶體回應於該第一控制信號S1而關斷，而該第二開關組件4的該NMOS電晶體回應於該第一控制信號S1而導通；相反地，當該第一控制信號S1為一低準位信號(如，零電壓信號)時，該第一開關組件3的該PMOS電晶體回應於該第一控制信號S1而關斷導通，而該第二開關組件4的該NMOS電晶體回應於該第一控制信號S1而關斷。相似地，當該第二控制信號(以下，以S2來表示)為一高準位信號時，該第三開關組件5的該PMOS電晶體回應於該第二控制信號S2而關斷，而該第四開關組件6的該NMOS電晶體回應於該第二控制信號S2而導通；相反地，當該第二控制信號S2為一低準位信號(如，零電壓信號)時，該第三開關組件5的該PMOS電晶體回應於該第二控制信號S2而關斷導通，而該第四開關組件6的該NMOS電晶體回應於該第二控制信號S2而關斷。Referring to FIG. 2 , in this embodiment, the first switch component 1 and the third switch component 3 are functionally and operationally identical to each other and each of them may include a PMOS transistor (for example, as shown in FIG. 2 A P-channel enhancement mode MOSFET (but not limited to this example) and a body diode connected in anti-parallel with the PMOS transistor. The second switching element 2 and the fourth switching element are functionally and operationally identical to each other and each of them may include an NMOS transistor (for example, an N-channel enhancement mode MOSFET as shown in Figure 2, but not For example only) and a body diode connected in anti-parallel with the PMOS transistor. More specifically, for the first switching component 3, the source and drain of the PMOS transistor are respectively coupled to the first input terminal 11 of the input side 1 and the positive terminal 21 of the output side 2, and the PMOS The gate of the transistor serves as the first control terminal; for the second switch component 4, the drain and source of the NMOS transistor are respectively coupled to the second input terminal 12 of the input side 1 and the output side 2. The positive terminal 21 , and the gate of the NMOS transistor serves as the second control terminal; for the third switching component 5 , the source and drain of the PMOS transistor are respectively coupled to the first input of the input side 1 terminal 11 and the negative terminal 22 of the output side 2, and the gate of the PMOS transistor serves as the third control terminal; and for the fourth switching component 6, the drain and source of the NMOS transistor are coupled respectively. The second input terminal 12 of the input side 1 and the negative terminal 22 of the output side 2, and the gate of the NMOS transistor serves as the fourth control terminal. Under this configuration, when the first control signal (hereinafter, represented by S1) is a high-level signal, the PMOS transistor of the first switch component 3 is turned off in response to the first control signal S1, The NMOS transistor of the second switch component 4 is turned on in response to the first control signal S1; conversely, when the first control signal S1 is a low level signal (such as a zero voltage signal), the second The PMOS transistor of a switch component 3 is turned off in response to the first control signal S1, and the NMOS transistor of the second switch component 4 is turned off in response to the first control signal S1. Similarly, when the second control signal (hereinafter, represented by S2) is a high-level signal, the PMOS transistor of the third switch component 5 is turned off in response to the second control signal S2, and the The NMOS transistor of the fourth switch component 6 is turned on in response to the second control signal S2; conversely, when the second control signal S2 is a low level signal (eg, a zero voltage signal), the third switch The PMOS transistor of the component 5 is turned off and turned on in response to the second control signal S2, and the NMOS transistor of the fourth switching component 6 is turned off in response to the second control signal S2.

以下，將參閱圖3和圖4來示例地說明該實施例在使用時允許該直流電源傳輸電路100的該輸入側1與該外部電源200的不同連接方式。Below, reference will be made to FIGS. 3 and 4 to exemplify the different connection modes that this embodiment allows for the input side 1 of the DC power transmission circuit 100 and the external power supply 200 when used.

如圖3所示，當該輸入側1的該第一輸入端11和該第二輸入端12分別耦接該外部電源200(例如，蓄電池)的一正極和一負極時，在此連接方式下，由於在該第一輸入端11接收到來自該外部電源200的直流電源Vin具有高電壓準位並作為該第二控制信號並且在該第二輸入端12接收到來自該外部電源200的零電壓作為該第一控制信號，所以該第一、四開關組件3，6導通而該第二、三開關組件4，5關斷，以致該輸入側1的該第一輸入端11經由導通的該第一開關組件3電連接該輸出側2的該正端21並且該輸入側1的該第二輸入端12經由導通的該第四開關組件6電連接該輸出側2的該負端22。於是，該直流電源Vin經由該直流電源傳輸電路100的傳輸且在該輸出側2被正確地輸出(亦即，在該輸出側2，該正端21的電位高於該負端22的電位，且該正、負端21，22之間的電位差即為該直流電源Vin)。As shown in FIG. 3 , when the first input terminal 11 and the second input terminal 12 of the input side 1 are respectively coupled to a positive pole and a negative pole of the external power supply 200 (for example, a battery), in this connection mode , since the DC power Vin received from the external power supply 200 at the first input terminal 11 has a high voltage level and serves as the second control signal and zero voltage from the external power supply 200 is received at the second input terminal 12 As the first control signal, the first and fourth switch components 3 and 6 are turned on and the second and third switch components 4 and 5 are turned off, so that the first input terminal 11 of the input side 1 passes through the turned-on third switch component. A switch component 3 is electrically connected to the positive terminal 21 of the output side 2 and the second input terminal 12 of the input side 1 is electrically connected to the negative terminal 22 of the output side 2 via the conductive fourth switch component 6 . Therefore, the DC power Vin is transmitted through the DC power transmission circuit 100 and is correctly output on the output side 2 (that is, on the output side 2, the potential of the positive terminal 21 is higher than the potential of the negative terminal 22, And the potential difference between the positive and negative terminals 21 and 22 is the DC power source Vin).

如圖4所示，當該輸入側1的該第一輸入端11和該第二輸入端12分別耦接該外部電源200的該負極和該正極時，在此連接方式下，由於在該第二輸入端12接收到來自該外部電源200的直流電源Vin具有高電壓準位並作為該第一控制信號並且在該第一輸入端11接收到來自該外部電源200的零電壓作為該第二控制信號，所以該第一、四開關組件3，6關斷而該第二、三開關組件4，5導通，以致該輸入側1的該第一輸入端11經由導通的該第三開關組件5電連接該輸出側2的該負端22並且該輸入側1的該第二輸入端12經由導通的該第二開關組件4電連接該輸出側2的該正端21。於是，同樣地，該直流電源Vin經由該直流電源傳輸電路100的傳輸且在該輸出側2被正確地輸出。As shown in Figure 4, when the first input terminal 11 and the second input terminal 12 of the input side 1 are respectively coupled to the negative pole and the positive pole of the external power supply 200, in this connection mode, due to the The second input terminal 12 receives the DC power Vin from the external power supply 200 with a high voltage level as the first control signal and the first input terminal 11 receives a zero voltage from the external power supply 200 as the second control signal. signal, so the first and fourth switch components 3, 6 are turned off and the second and third switch components 4, 5 are turned on, so that the first input terminal 11 of the input side 1 is electrically connected via the turned-on third switch component 5. The negative terminal 22 of the output side 2 is connected, and the second input terminal 12 of the input side 1 is electrically connected to the positive terminal 21 of the output side 2 via the conductive second switch component 4 . Therefore, similarly, the DC power Vin is transmitted through the DC power transmission circuit 100 and is correctly output on the output side 2 .

值得注意的是，在實際使用時，無論該輸入側1的該第一、二輸入端11，12如何經由裸線連接方式與該外部電源200的正、負極連接，該直流電源傳輸電路100均能在該輸出側2正確地輸出該直流電源，如此能確保對於該負載裝置300的反接保護。It is worth noting that in actual use, no matter how the first and second input terminals 11 and 12 of the input side 1 are connected to the positive and negative poles of the external power supply 200 through bare wire connection, the DC power transmission circuit 100 will The DC power supply can be correctly outputted on the output side 2 , thus ensuring reverse polarity protection for the load device 300 .

綜上所述，由於該第一至第四開關組件3~6的配置與設計，無論該輸入側1的該第一、二輸入端11，12如何與該外部電源的正、負極連接均能確保在該輸出側2以正確的極性輸出來自該外部電源200的直流電源，藉此對於連接該輸出側2的負載裝置200所提供之反接保護功能是現有使用如二極體之開關組件的保護電路所無法達成的。由於該輸入側1在與該外部電源200電連接時並無特別的極性要求，因而能使該外部電源200與該負載裝置300之間的電連接更為容易且方便。因此，本發明的直流電源傳輸電路100確實能達成本發明的目的。In summary, due to the configuration and design of the first to fourth switch components 3 to 6, no matter how the first and second input terminals 11 and 12 of the input side 1 are connected to the positive and negative poles of the external power supply, Ensure that the DC power from the external power supply 200 is output with correct polarity on the output side 2, thereby providing a reverse polarity protection function for the load device 200 connected to the output side 2 that currently uses switching components such as diodes. protection circuit cannot be achieved. Since there is no special polarity requirement when the input side 1 is electrically connected to the external power supply 200, the electrical connection between the external power supply 200 and the load device 300 can be made easier and more convenient. Therefore, the DC power transmission circuit 100 of the present invention can indeed achieve the purpose of the present invention.

惟以上所述者，僅為本發明的實施例而已，當不能以此限定本發明實施的範圍，凡是依本發明申請專利範圍及專利說明書內容所作的簡單的等效變化與修飾，皆仍屬本發明專利涵蓋的範圍內。However, the above are only examples of the present invention. They cannot be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the contents of the patent specification are still within the scope of the present invention. within the scope covered by the patent of this invention.

100…直流電源傳輸電路 1…輸入側 11…第一輸入端 12…第二輸入端 2…輸出側 21…正端 22…負端 3…第一開關組件 4…第二開關組件 5…第三開關組件 6…第四開關組件 200…外部電源 300…負載裝置 S1…第一控制信號 S2…第二控制信號 Vin…直流電源 100…DC power transmission circuit 1...input side 11…First input terminal 12...Second input terminal 2…output side 21…upright 22…negative terminal 3…First switch assembly 4…Second switch assembly 5…Third switch assembly 6…Fourth switch assembly 200…external power supply 300…Load device S1...first control signal S2…second control signal Vin…DC power supply

本發明的其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中： 圖1是一方塊圖，示例性地說明本發明實施例的一種直流電源傳輸電路以及一外部電源和一負載裝置； 圖2是一電路圖，示例性地說明該實施例； 圖3是一等效電路圖，說明該實施例與該外部電源的一種連接方式；及 圖4是一等效電路圖，說明該實施例與該外部電源的另一種連接方式。 Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a block diagram schematically illustrating a DC power transmission circuit, an external power supply and a load device according to an embodiment of the present invention; Figure 2 is a circuit diagram illustrating this embodiment; Figure 3 is an equivalent circuit diagram illustrating a connection method between the embodiment and the external power supply; and FIG. 4 is an equivalent circuit diagram illustrating another connection method between the embodiment and the external power supply.

100…直流電源傳輸電路 1…輸入側 11…第一輸入端 12…第二輸入端 2…輸出側 21…正端 22…負端 3…第一開關組件 4…第二開關組件 5…第三開關組件 6…第四開關組件 200…外部電源 300…負載裝置 100…DC power transmission circuit 1...input side 11…First input terminal 12...Second input terminal 2…output side 21…upright 22…negative terminal 3…First switch assembly 4…Second switch assembly 5…Third switch assembly 6…Fourth switch assembly 200…external power supply 300…Load device

Claims (3)

一種直流電源傳輸電路，用於傳輸來自一外部電源的直流電源，並包含： 一輸入側，適於電連接該外部電源以接收該直流電源並具有一第一輸入端和一第二輸入端； 一輸出側，用於輸出該直流電源並具有一正端和一負端； 一第一開關組件，電連接在該輸入側的該第一輸入端與該輸出側的該正端之間，具有一耦接該輸入側的該第二輸入端的第一控制端，並回應於在該第一控制端接收的一第一控制信號而導通或關斷； 一第二開關組件，電連接在該輸入側的該第二輸入端與該輸出側的該正端之間，具有一耦接該輸入側的該第二輸入端的第二控制端，並回應於在該第二控制端接收的該第一控制信號而關斷或導通； 一第三開關組件，電連接在該輸入側的該第一輸入端與該輸出側的該負端之間，具有一耦接該輸入側的該第一輸入端的第三控制端，並回應於在該第三控制端接收的一第二控制信號而關斷或導通；及 一第四開關組件，電連接在該輸入側的該第二輸入端與該輸出側的該負端之間，具有一耦接該輸入側的該第一輸入端的第四控制端，並回應於在該第四控制端接收的該第二控制信號而導通或關斷； 其中，當該輸入側的該第一輸入端和該第二輸入端分別耦接該外部電源的一正極和一負極時，該第一、四開關組件導通而該第二、三開關組件關斷，以致該輸入側的該第一輸入端經由導通的該第一開關組件電連接該輸出側的該正端並且該輸入側的該第二輸入端經由導通的該第四開關組件電連接該輸出側的該負端；及 其中，當該輸入側的該第一輸入端和該第二輸入端分別耦接該外部電源的該負極和該正極時，該第二、三開關組件導通而該第一、四開關組件關斷，以致該輸入側的該第一輸入端經由導通的該第三開關組件電連接該輸出側的該負端並且該輸入側的該第二輸入端經由導通的該第二開關組件電連接該輸出側的該正端。 A DC power transmission circuit for transmitting DC power from an external power source and comprising: An input side is adapted to be electrically connected to the external power source to receive the DC power source and has a first input end and a second input end; An output side is used to output the DC power supply and has a positive terminal and a negative terminal; A first switch component is electrically connected between the first input terminal of the input side and the positive terminal of the output side, has a first control terminal coupled to the second input terminal of the input side, and responds to A first control signal received at the first control terminal is turned on or off; A second switch component is electrically connected between the second input terminal of the input side and the positive terminal of the output side, has a second control terminal coupled to the second input terminal of the input side, and responds to The first control signal received at the second control terminal is turned off or on; A third switch component is electrically connected between the first input terminal of the input side and the negative terminal of the output side, has a third control terminal coupled to the first input terminal of the input side, and responds to A second control signal is received at the third control terminal to turn off or on; and A fourth switch component is electrically connected between the second input terminal of the input side and the negative terminal of the output side, has a fourth control terminal coupled to the first input terminal of the input side, and responds to The second control signal received at the fourth control terminal is turned on or off; Wherein, when the first input terminal and the second input terminal of the input side are respectively coupled to a positive pole and a negative pole of the external power supply, the first and fourth switching components are turned on and the second and third switching components are turned off. , so that the first input terminal of the input side is electrically connected to the positive terminal of the output side via the conductive first switch component and the second input terminal of the input side is electrically connected to the output via the conductive fourth switch component. the negative terminal of the side; and Wherein, when the first input terminal and the second input terminal of the input side are respectively coupled to the negative pole and the positive pole of the external power supply, the second and third switching components are turned on and the first and fourth switching components are turned off. , so that the first input terminal of the input side is electrically connected to the negative terminal of the output side via the conductive third switch component and the second input terminal of the input side is electrically connected to the output via the conductive second switch component The positive end of the side. 如請求項1所述的直流電源傳輸電路，其中，該第一開關組件在功能及操作上相同於該第三開關組件，且該第二開關組件在功能及操作上相同於該第四開關組件。The DC power transmission circuit of claim 1, wherein the first switch component is functionally and operationally identical to the third switch component, and the second switch component is functionally and operationally identical to the fourth switch component . 如請求項2所述的直流電源傳輸電路，其中，該第一、三開關組件其中每一者包含一PMOS電晶體，且該第二、四開關組件其中每一者包含一NMOS電晶體。The DC power transmission circuit of claim 2, wherein each of the first and third switch components includes a PMOS transistor, and each of the second and fourth switch components includes an NMOS transistor.
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