Reverse connection prevention circuit, chip and electronic equipment

Abstract

The utility model relates to the field of circuits, and discloses an anti-reverse connection circuit, a chip and electronic equipment. The anti-reverse-connection circuit comprises a one-way conductive element and an instrument board circuit. The instrument board circuit comprises a first P-type triode, an N-type triode, a first end and a second end, a base electrode of the first P-type triode is connected with a collector electrode of the N-type triode, an emitting electrode of the first P-type triode is connected with the first end, an emitting electrode of the N-type triode is connected with the second end, and the first end and the second end are used for being connected with a battery; the one-way conducting element is arranged in the instrument board circuit between the first end and the second end, and the one-way conducting element is used for preventing current from flowing back to the battery through the instrument board circuit when the battery is reversely connected with the first end and the second end.

Description

Technical Field

[0001] The utility model relates to the field of circuits, in particular to an anti-reverse connection circuit, a chip and an electronic device. Background Art

[0002] Generally speaking, the central control screen of a car can be used to display navigation information, the interface for playing music, etc., and the instrument panel includes the tachometer and the speedometer. With the development of smart cars, the central control screen and the instrument panel of the car are gradually integrated to form a dashboard with a larger screen. For example Figure 1 A schematic diagram of a dashboard is shown, and the dashboard can display the speed, code speed and navigation information. In the dashboard circuit, the battery supplies power to the dashboard circuit by connecting the positive electrode of the battery to the first end of the dashboard circuit and the negative electrode of the battery to the second end of the dashboard circuit. The dashboard circuit also includes one or more other chips for implementing various functions. For example, the dashboard circuit may include a storage chip for storing historical navigation information, storing historical music playback records, etc.

[0003] However, if the positive pole of the battery is connected to the second end of the dashboard circuit and the negative pole of the battery is connected to the first end of the dashboard circuit, that is, the battery is connected to the first end and the second end of the dashboard circuit in reverse, the current input to the dashboard circuit will be reversed. On the one hand, it will cause the chip connected to the dashboard circuit to generate negative voltage and damage the chip. On the other hand, it will affect the normal operation of other chips powered by the battery. Utility Model Content

[0004] The embodiments of the utility model provide an anti-reverse connection circuit, a chip and an electronic device, which reduce the influence of the reverse current caused by the reverse connection of the battery on the circuit powered by the battery by setting at least one unidirectional conductive element in the instrument panel circuit and utilizing the unidirectional conductive characteristics of the unidirectional conductive element.

[0005] In the first aspect, the utility model provides an anti-reverse connection circuit, including a unidirectional conductive element and an instrument panel circuit; the instrument panel circuit includes a first P-type transistor, an N-type transistor, a first end and a second end, the base of the first P-type transistor is connected to the collector of the N-type transistor, the emitter of the first P-type transistor is connected to the first end, the emitter of the N-type transistor is connected to the second end, and the first end and the second end are used to be connected to a battery; the unidirectional conductive element is arranged in the instrument panel circuit between the first end and the second end, and the unidirectional conductive element is used to prevent current from flowing back to the battery through the instrument panel circuit when the battery is reversely connected to the first end and the second end.

[0006] In some optional implementations of the first aspect, the unidirectional conductive element includes a first unidirectional conductive element, one end of the first unidirectional conductive element is connected to the first end, and the other end of the first unidirectional conductive element is connected to the emitter of the first P-type transistor.

[0007] In some optional implementations of the first aspect, the unidirectional conductive element includes a second unidirectional conductive element, one end of the second unidirectional conductive element is connected to the base of the first P-type transistor, and the other end of the second unidirectional conductive element is connected to the collector of the N-type transistor.

[0008] In some optional implementations of the first aspect, the unidirectional conductive element includes a third unidirectional conductive element, one end of the third unidirectional conductive element is connected to the second end, and the other end of the third unidirectional conductive element is connected to the emitter of the N-type transistor.

[0009] In some optional implementations of the first aspect, the unidirectional conductive element includes a third unidirectional conductive element, one end of the third unidirectional conductive element is connected to the second end, and the other end of the third unidirectional conductive element is connected to the emitter of the N-type transistor.

[0010] In some optional implementations of the first aspect, the unidirectional conductive element is a second P-type transistor or a diode.

[0011] In a second aspect, the present application provides a chip in which the anti-reverse connection circuit as mentioned in the first aspect is formed.

[0012] In a third aspect, the present application provides an electronic device, comprising the chip mentioned in the second aspect.

[0013] The beneficial effect of the present application is to reduce the influence of the reverse current caused by the reverse connection of the battery on the circuit powered by the battery.

[0014] In the embodiment of the present application, a unidirectional conductive element is arranged between the first end and the second end of the instrument panel circuit. When the battery is reversely connected to the first end and the second end of the instrument panel circuit, the unidirectional conductive element can prevent the current from flowing back to the instrument panel circuit through the circuit. In this way, the unidirectional conductive property of the unidirectional conductive element can reduce the impact of the reverse current caused by the reverse connection of the battery on the circuit powered by the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 According to some embodiments of the present application, a schematic diagram of a dashboard is shown;

[0016] Figure 2 According to some embodiments of the present application, a circuit schematic diagram is shown;

[0017] Figure 3 According to some embodiments of the present application, a schematic diagram of a reverse connection circuit is shown;

[0018] Figure 4 According to some embodiments of the present application, a schematic diagram of an anti-reverse connection circuit is shown;

[0019] Figure 5 According to some embodiments of the present application, a schematic diagram of an anti-reverse connection circuit is shown;

[0020] Figure 6 According to some embodiments of the present application, a schematic diagram of an anti-reverse connection circuit is shown;

[0021] Figure 7 According to some embodiments of the present application, a schematic diagram of an anti-reverse connection circuit is shown;

[0022] Figure 8 According to some embodiments of the present application, a schematic diagram of an anti-reverse connection circuit is shown;

[0023] Fig. 9 According to some embodiments of the present application, a schematic diagram of an anti-reverse connection circuit is shown;

[0024] Fig.10 According to some embodiments of the present application, a schematic diagram of an anti-reverse connection circuit is shown.

[0025] Figure numerals: 1-control pin, 10-circuit, 100-battery, 110-instrument panel circuit, 20-anti-reverse connection circuit, 101-positive pole of the battery, 102-negative pole of the battery, 111-first end of the instrument panel circuit, 112-second end of the instrument panel circuit, 121-first P-type transistor 121, 122-N-type transistor, E1-emitter of the first P-type transistor, B1-base of the first P-type transistor, C1-collector of the first P-type transistor, E2-emitter of the N-type transistor, B2-base of the N-type transistor, C2-collector of the N-type transistor, 123-diode (first unidirectional conductive element), 124-diode (second unidirectional conductive element), 125-diode (third unidirectional conductive element). DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0027] like Figure 2 As shown, the circuit 10 may include a battery 100 and a dashboard circuit 110, wherein the battery 100 has a positive electrode 101 and a negative electrode 102, and the dashboard circuit 110 has a first terminal 111 and a second terminal 112. When the positive electrode 101 of the battery 100 is connected to the first terminal 111 of the dashboard circuit 110, and the negative electrode 102 of the battery 100 is connected to the second terminal 112 of the dashboard circuit 110, the battery 100 may supply power to the dashboard circuit 110.

[0028] In some specific examples, the instrument panel circuit 110 has a first P-type transistor 121, an N-type transistor 122 and a control pin 1, wherein the first P-type transistor 121 has an emitter E1, a base B1 and a collector C1, and the N-type transistor 122 has an emitter E2, a base B2 and a collector C2. The emitter E1 of the first P-type transistor 121 is connected to the first end 111 of the instrument panel circuit 110, the base B1 of the first P-type transistor 121 is connected to the collector C2 of the N-type transistor 122, the collector C1 of the first P-type transistor 121 is connected to the second end 112 of the instrument panel circuit 110, the base B2 of the N-type transistor 122 is connected to the control pin 1, and the emitter E2 of the N-type transistor 122 is connected to the second end 112 of the instrument panel circuit 110. Among them, the control pin 1 can be connected to the control chip, and the control pin 1 can be used to control the instrument panel to be in a screen-on state or a screen-off state. For example, the control chip outputs a signal "1" to indicate that the instrument panel is in a screen-on state, and the control chip outputs a signal "0" to indicate that the instrument panel is in a screen-off state.

[0029] In some optional embodiments, the current of the battery 100 flows from the positive electrode 101 through the first terminal 111 of the instrument panel circuit 110 into the instrument panel circuit 110, and the current can be divided into two paths after flowing through the first P-type transistor 121. One path of current flows from the base B1 of the first P-type transistor 121 to the collector C2 of the N-type transistor 122, and then flows from the emitter E2 of the N-type transistor 122 to the second terminal 112 of the instrument panel circuit 110, and then flows into the negative electrode 102 of the battery 100. The other path of current flows from the collector C1 of the first P-type transistor 121 to the second terminal 112 of the instrument panel circuit 110, and then flows into the negative electrode 102 of the battery 100. In this way, the battery 100 completes the supply of power to the instrument panel circuit 110.

[0030] In some other optional examples, if the battery 100 is reversely connected to the first terminal 111 and the second terminal 112, that is, the positive electrode 101 of the battery 100 is connected to the second terminal 112 of the dashboard circuit 110, and the negative electrode 102 of the battery is connected to the first terminal 111 of the dashboard circuit 110, the current input to the dashboard circuit 110 is reversed. Figure 3 As shown, after the current flows from the positive electrode 101 of the battery 100 to the second terminal 112 of the instrument panel circuit 110, the current can be divided into two paths. One path of current flows from the collector C2 of the N-type transistor 122 to the base B1 of the first P-type transistor 121 and then to the first terminal 111 of the instrument panel circuit 110, and then flows into the battery 100. The other path of current flows from the collector C1 of the first P-type transistor 121 to the emitter E1, then flows to the first terminal 111 of the instrument panel circuit 110, and then flows into the battery 100.

[0031] As mentioned above, the instrument panel circuit 110 also includes one or more chips (not shown). When the battery 100 is reversely connected to the first terminal 111 and the second terminal, the chip connected to the instrument panel circuit 110 generates a negative voltage, which causes damage to the chip, affects the normal operation of the instrument panel circuit 110, and also affects the normal operation of other chips powered by the battery 100. Therefore, if the battery 100 is reversely connected, it will affect the normal operation of the circuit powered by the battery 100, and even damage the circuit powered by the battery 100.

[0032] In order to solve the above problems, the present application provides an anti-reverse connection circuit, in which Figure 2 or Figure 3 In the circuit shown, a unidirectional conductive element is provided between the first terminal 111 and the second terminal 112 of the instrument panel circuit 110. When the battery 100 is reversely connected to the first terminal 111 and the second terminal 112 of the instrument panel circuit 110, the unidirectional conductive element can prevent the current from flowing back to the battery 100 through the circuit. In this way, the unidirectional conductive property of the unidirectional conductive element can reduce the influence of the reverse current caused by the reverse connection of the battery 100 on the circuit powered by the battery 100.

[0033] For example, at least one first unidirectional conductive element 124 may be disposed between the first end 111 of the instrument panel circuit 110 and the emitter E1 of the first P-type transistor 121, at least one second unidirectional conductive element 123 may be disposed between the base B1 of the first P-type transistor 121 and the collector C2 of the N-type transistor 122, and / or at least one third unidirectional conductive element 125 may be disposed between the second end 112 of the instrument panel circuit 110 and the emitter E2 of the N-type transistor 122.

[0034] It can be understood that in some optional examples, the unidirectional conductive element can be a diode with forward conduction and reverse cutoff characteristics. By arranging a diode between the first end 111 and the second end 112 of the instrument panel circuit 110, the forward conduction and reverse cutoff characteristics of the diode can be utilized, and the influence of the reverse current caused by the reverse connection of the battery 100 on the chip connected to the instrument panel circuit 110 and other circuits powered by the battery 100 can be reduced. In addition, since the cost of the diode is relatively low, the manufacturing cost of the instrument panel circuit can be reduced. In some other optional examples, the unidirectional conductive element can also be a second P-type transistor.

[0035] For the convenience of description, the following description takes the case where the unidirectional conductive element in several embodiments is a diode as an example.

[0036] Embodiment 1

[0037] In some specific embodiments, the reverse connection prevention circuit 20 includes a battery 100 and a dashboard circuit 110. Figure 4As shown, the instrument panel circuit 110 has a first P-type transistor 121, an N-type transistor 122, a diode 123 (i.e., the second unidirectional conductive element mentioned above) and a control pin 1. The first P-type transistor 121 has an emitter E1, a base B1 and a collector C1, and the N-type transistor 122 has an emitter E2, a base B2 and a collector C2. The emitter E1 of the first P-type transistor 121 is connected to the first end 111 of the instrument panel circuit 110, the base B1 of the first P-type transistor 121 is connected to the anode of the diode 123, the collector C1 of the first P-type transistor 121 is connected to the second end 112 of the instrument panel circuit 110, the collector C2 of the N-type transistor 122 is connected to the cathode of the diode 123, the base B2 of the N-type transistor 122 is connected to the control pin 1, and the emitter E2 of the N-type transistor 122 is connected to the second end 112 of the instrument panel circuit 110.

[0038] In some specific embodiments, the diode 123 may be one diode or multiple diodes. When the diode 123 is multiple diodes, the diodes in the multiple diodes are connected in parallel and / or in series in a manner that the anode of one diode is connected to the cathode of another diode.

[0039] When the battery 100 is connected to the first terminal 111 and the second terminal 112 of the instrument panel circuit 110 in reverse connection, that is, the positive electrode 101 of the battery 100 is connected to the second terminal 112 of the instrument panel circuit 110, and the negative electrode 102 of the battery 100 is connected to the first terminal 111 of the instrument panel circuit 110, the diode 123 can prevent the current from flowing through the first P-type transistor 121. In some specific examples, the current flows from the positive electrode 101 of the battery 100 through the second terminal 112 of the instrument panel circuit 110 into the instrument panel circuit 110, and the current can be divided into two paths. One path of current flows from the collector C2 of the N-type transistor 122 to the diode 123. Since the diode 123 has the characteristic of not conducting reverse current, only a very small part of the current or even no current flows to the base B1 of the first P-type transistor 121, and then flows to the first terminal 111 of the instrument panel circuit 110, and then flows into the battery 100. Another current flows to the collector C1 of the first P-type transistor 121. Since the first P-type transistor 121 has the function of not conducting reverse current, only a small part of the current or even no current flows to the first end 111 of the instrument panel circuit 110, and then flows into the battery 100. In this way, the forward conduction and reverse blocking characteristics of the diode are utilized to prevent the reverse current from flowing into the first P-type transistor 121, thereby reducing the impact of the reverse current caused by the reverse connection of the battery 100 on the chip connected to the instrument panel circuit 110 and other circuits powered by the battery 100.

[0040] Embodiment 2

[0041] In some specific examples, the reverse connection prevention circuit 20 includes a battery 100 and a dashboard circuit 110. Figure 5 As shown, the instrument panel circuit 110 has a first P-type transistor 121, an N-type transistor 122, a diode 124 (i.e., the first unidirectional conductive element mentioned above), and a control pin 1. The first P-type transistor 121 has an emitter E1, a base B1, and a collector C1, and the N-type transistor 122 has an emitter E2, a base B2, and a collector C2. The anode of the diode 124 is connected to the first end 111 of the instrument panel circuit 110, the cathode of the diode 124 is connected to the emitter E1 of the first P-type transistor 121, the base B1 of the first P-type transistor 121 is connected to the collector C2 of the N-type transistor 122, the base B2 of the N-type transistor 122 is connected to the control pin 1, and the emitter E2 of the N-type transistor 122 is connected to the second end 112 of the instrument panel circuit 110.

[0042] In some specific examples, the diode 124 may be one diode or multiple diodes. When the diode 124 is multiple diodes, the diodes in the multiple diodes are connected in parallel and / or in series in a manner that the anode of one diode is connected to the cathode of another diode.

[0043] When the battery 100 is reversely connected to the first terminal 111 and the second terminal 112 of the instrument panel circuit 110, that is, the positive electrode 101 of the battery 100 is connected to the second terminal 112 of the instrument panel circuit 110, and the negative electrode 102 of the battery 100 is connected to the first terminal 111 of the instrument panel circuit 110, the diode 124 can prevent the current from flowing back to the battery 100. In some specific examples, the current flows from the positive electrode 101 of the battery 100 through the second terminal 112 of the instrument panel circuit 110 into the instrument panel circuit 110, and the current can be divided into two paths. One path of current flows from the collector C2 of the N-type transistor 122 to the base B1 of the first P-type transistor 121, and then flows to the diode 124. Since the diode 124 has the characteristic of not conducting reverse current, only a very small part of the current or even no current flows to the first terminal 111 of the instrument panel circuit 110, and then flows into the battery 100. Another current flows to the collector C1 of the first P-type transistor 121. Since the first P-type transistor 121 has the function of not conducting reverse current, only a small part of the current or even no current flows to the first terminal 111 of the instrument panel circuit 110, and then flows into the battery 100. In this way, the forward conduction and reverse blocking characteristics of the diode are utilized to prevent the reverse current from flowing into the battery 100, thereby reducing the impact of the reverse current caused by the reverse connection of the battery 100 on the chip connected to the instrument panel circuit 110 and other circuits powered by the battery 100.

[0044] Embodiment 3

[0045] In some specific examples, the reverse connection prevention circuit 20 includes a battery 100 and a dashboard circuit 110. Figure 6 As shown, the instrument panel circuit 110 has a first P-type transistor 121, an N-type transistor 122, a diode 125 (i.e., the third unidirectional conductive element mentioned above), and a control pin 1. The first P-type transistor 121 has an emitter E1, a base B1, and a collector C1, and the N-type transistor 122 has an emitter E2, a base B2, and a collector C2. The first terminal 111 of the instrument panel circuit 110 is connected to the emitter E1 of the first P-type transistor 121, the base B1 of the first P-type transistor 121 is connected to the collector C2 of the N-type transistor 122, the collector C1 of the first P-type transistor 121 is connected to the anode of the diode 125, the base B2 of the N-type transistor 122 is connected to the control pin 1, the emitter E2 of the N-type transistor 122 is connected to the anode of the diode 125, and the cathode of the diode 125 is connected to the second terminal 112 of the instrument panel circuit 110.

[0046] In some specific implementations, the diode 125 includes at least one diode, or may be a plurality of diodes. When the diode 125 is a plurality of diodes, the diodes in the plurality of diodes are connected in parallel and / or in series in a manner that the anode of one diode is connected to the cathode of another diode.

[0047] When the battery 100 is reversely connected to the first terminal 111 and the second terminal 112 of the instrument panel circuit 110, that is, the positive electrode 101 of the battery 100 is connected to the second terminal 112 of the instrument panel circuit 110, and the negative electrode 102 of the battery 100 is connected to the first terminal of the instrument panel circuit 110, the diode 125 can prevent the current from flowing through the N-type transistor 122 and the first P-type transistor 121. In some specific examples, the current flows from the positive electrode 101 of the battery 100 through the second terminal 112 of the instrument panel circuit 110 into the instrument panel circuit 110. Since the diode 125 has the characteristic of non-conducting reverse current, only a very small part of the current or even no current flows to the N-type transistor 122 and the first P-type transistor 121. In this way, the forward conduction and reverse blocking characteristics of the diode are utilized to prevent the reverse current from flowing into the N-type transistor 122 and the first P-type transistor 121, thereby reducing the influence of the reverse current caused by the reverse connection of the battery 100 on the chip connected to the instrument panel circuit 110 and other circuits powered by the battery 100.

[0048] Embodiment 4

[0049] In some specific examples, the reverse connection prevention circuit 20 includes a battery 100 and a dashboard circuit 110. Figure 7As shown, the instrument panel circuit 110 has a first P-type transistor 121, an N-type transistor 122, a diode 124 (i.e., the first unidirectional conductive element mentioned above), a diode 125 (i.e., the third unidirectional conductive element mentioned above), and a control pin 1. The first P-type transistor 121 has an emitter E1, a base B1, and a collector C1, and the N-type transistor 122 has an emitter E2, a base B2, and a collector C2. The first end 111 of the instrument panel circuit 110 is connected to the anode of the diode 124, the cathode of the diode 124 is connected to the emitter E1 of the first P-type transistor 121, the base B1 of the first P-type transistor 121 is connected to the collector C2 of the N-type transistor 122, the collector C1 of the first P-type transistor 121 is connected to the anode of the diode 125, the base B2 of the N-type transistor 122 is connected to the control pin 1, the emitter E2 of the N-type transistor 122 is connected to the anode of the diode 125, and the cathode of the diode 125 is connected to the second end 112 of the instrument panel circuit 110.

[0050] In some specific implementations, the diode 124 may be one diode or multiple diodes. When the diode 124 is multiple diodes, the diodes in the multiple diodes are connected in parallel and / or in series in a manner that the positive electrode of one diode is connected to the negative electrode of another diode. The diode 125 may also be one diode or multiple diodes. When the diode 125 is multiple diodes, the diodes in the multiple diodes are connected in parallel and / or in series in a manner that the positive electrode of one diode is connected to the negative electrode of another diode.

[0051] When the battery 100 is reversely connected to the first terminal 111 and the second terminal 112 of the instrument panel circuit 110, that is, the positive electrode 101 of the battery 100 is connected to the second terminal 112 of the instrument panel circuit 110, and the negative electrode 102 of the battery 100 is connected to the first terminal 111 of the instrument panel circuit 110, the diode 124 blocks the current from flowing back to the battery 100, and the diode 125 blocks the current from flowing through the N-type transistor 122 and the first P-type transistor 121. In some specific examples, the current flows from the positive electrode 101 of the battery 100 through the second terminal 112 of the instrument panel circuit 110 into the instrument panel circuit 110. Since the diode 125 has the characteristic of not conducting reverse current, only a very small part of the current or even no current flows to the N-type transistor 122 and the first P-type transistor 121. Even if a small portion of the current flowing through the N-type transistor 122 flows to the first P-type transistor 121, since the first P-type transistor 121 has the function of not conducting reverse current, and the diode 124 has the characteristic of not conducting reverse current, almost no current flows back to the battery 100. In this way, the forward conduction and reverse blocking characteristics of the diode are utilized to prevent the reverse current from flowing into the N-type transistor 122 and the first P-type transistor 121, and prevent the reverse current from flowing back to the battery, thereby reducing the impact of the reverse current caused by the reverse connection of the battery 100 on the chip connected to the instrument panel circuit 110 and other circuits powered by the battery 100.

[0052] Embodiment 5

[0053] The reverse connection prevention circuit 20 includes a battery 100 and a dashboard circuit 110. Figure 8 As shown, the instrument panel circuit 110 has a first P-type transistor 121, an N-type transistor 122, a diode 123 (i.e., the second unidirectional conductive element mentioned above), a diode 124 (i.e., the first unidirectional conductive element mentioned above), a diode 125 (i.e., the third unidirectional conductive element mentioned above), and a control pin 1. The first P-type transistor 121 has an emitter E1, a base B1, and a collector C1, and the N-type transistor 122 has an emitter E2, a base B2, and a collector C2. The first end 111 of the instrument panel circuit 110 is connected to the anode of the diode 124, the cathode of the diode 124 is connected to the emitter E1 of the first P-type transistor 121, the base B1 of the first P-type transistor 121 is connected to the anode of the diode 123, the collector C1 of the first P-type transistor 121 is connected to the anode of the diode 125, the cathode of the diode 123 is connected to the collector C2 of the N-type transistor 122, the emitter E2 of the N-type transistor 122 is connected to the anode of the diode 125, the base B2 of the N-type transistor 122 is connected to the control pin 1, and the cathode of the diode 125 is connected to the second end 112 of the instrument panel circuit 110.

[0054] In some specific implementations, diode 123 may be a diode or a plurality of diodes. When diode 123 is a plurality of diodes, the diodes in the plurality of diodes are connected in parallel and / or in series in a manner that the positive electrode of one diode is connected to the negative electrode of another diode. Diode 124 may be a diode or a plurality of diodes. When diode 124 is a plurality of diodes, the diodes in the plurality of diodes are connected in parallel and / or in series in a manner that the positive electrode of one diode is connected to the negative electrode of another diode. Diode 125 may also be a diode or a plurality of diodes. When diode 125 is a plurality of diodes, the diodes in the plurality of diodes are connected in parallel and / or in series in a manner that the positive electrode of one diode is connected to the negative electrode of another diode.

[0055] When the battery 100 is reversely connected to the first terminal 111 and the second terminal 112 of the instrument panel circuit 110, that is, the positive electrode 101 of the battery 100 is connected to the second terminal 112 of the instrument panel circuit 110, and the negative electrode 102 of the battery 100 is connected to the first terminal 111 of the instrument panel circuit 110, the diode 125 blocks the current from flowing through the N-type transistor 122 and the first P-type transistor 121, the diode 123 blocks the current from flowing through the first P-type transistor 121, and the diode 124 blocks the current from flowing back to the battery 100. In some specific implementations, the current flows from the positive electrode 101 of the battery 100 through the second terminal 112 of the instrument panel circuit 110 into the instrument panel circuit 110. Since the diode 125 has the characteristic of not conducting reverse current, only a very small part of the current or even no current flows to the N-type transistor 122 and the first P-type transistor 121. Even if a very small part of the current flowing through the N-type transistor 122 flows to the diode 123, since the diode 123 has the characteristic of non-conducting reverse current, only a small amount of current or even no current flows to the first P-type transistor 121. Even if a very small part of the current flows through the first P-type transistor 121, since the first P-type transistor 121 has the function of non-conducting reverse current, only a small amount of current finally flows to the diode 124. Since the diode 124 has the characteristic of non-conducting reverse current, almost no current finally flows back to the battery 100. In this way, the forward conduction and reverse cutoff characteristics of the diode are utilized to prevent the reverse current from flowing into the N-type transistor 122, the reverse current from flowing into the first P-type transistor 121, and the reverse current from flowing back to the battery 100, thereby reducing the impact of the reverse current caused by the reverse connection of the battery 100 on the chip connected to the instrument panel circuit 110 and other circuits powered by the battery 100.

[0056] Embodiment 6

[0057] The reverse connection prevention circuit 20 includes a battery 100 and a dashboard circuit 110. Fig. 9As shown, the instrument panel circuit 110 has a first P-type transistor 121, an N-type transistor 122, a diode 123, a diode 124 and a control pin 1, wherein the first P-type transistor 121 has an emitter E1, a base B1 and a collector C1, and the N-type transistor 122 has an emitter E2, a base B2 and a collector C2. The first end 111 of the instrument panel circuit 110 is connected to the anode of the diode 124, the emitter E1 of the first P-type transistor 121 is connected to the cathode of the diode 124, the base B1 of the first P-type transistor 121 is connected to the anode of the diode 123, the collector C1 of the first P-type transistor 121 is connected to the second end 112 of the instrument panel circuit 110, the cathode of the diode 123 is connected to the collector C2 of the N-type transistor 122, the base B2 of the N-type transistor 122 is connected to the control pin 1, and the emitter E2 of the N-type transistor 122 is connected to the second end 112 of the instrument panel circuit 110.

[0058] In some specific implementations, the diode 123 may be one diode or multiple diodes. When the diode 123 is multiple diodes, the diodes in the multiple diodes are connected in parallel and / or in series in a manner that the positive electrode of one diode is connected to the negative electrode of another diode. The diode 124 may be one diode or multiple diodes. When the diode 124 is multiple diodes, the diodes in the multiple diodes are connected in parallel and / or in series in a manner that the positive electrode of one diode is connected to the negative electrode of another diode.

[0059] When the battery 100 is reversely connected to the first terminal 111 and the second terminal 112 of the instrument panel circuit 110, that is, the positive electrode 101 of the battery 100 is connected to the second terminal 112 of the instrument panel circuit 110, and the negative electrode 102 of the battery 100 is connected to the first terminal 111 of the instrument panel circuit 110, the diode 123 blocks the current from flowing through the first P-type transistor 121, and the diode 124 blocks the current from flowing back to the battery 100. In some specific implementations, the current flows from the positive electrode 101 of the battery 100 through the second terminal 112 of the instrument panel circuit 110 into the instrument panel circuit 110, and the current can be divided into two paths. One path of current flows from the collector C2 of the N-type transistor 122 to the diode 123. Since the diode 123 has the characteristic of non-conducting reverse current, only a very small part of the current or even no current flows to the first P-type transistor. Even if a very small part of the current flows to the first P-type transistor 121, since the diode 124 has the characteristic of non-conducting reverse current, almost no current flows to the battery 100. In this way, the forward conduction and reverse blocking characteristics of the diode are utilized to prevent the reverse current from flowing into the first P-type transistor 121 and to prevent the reverse current from flowing back to the battery 100, thereby reducing the impact of the reverse current caused by the reverse connection of the battery 100 on the chips connected to the instrument panel circuit 110 and other circuits powered by the battery 100.

[0060] Embodiment 7

[0061] The reverse connection prevention circuit 20 includes a battery 100 and a dashboard circuit 110. Fig.10 As shown, the instrument panel circuit 110 has a first P-type transistor 121, an N-type transistor 122, a diode 123 (i.e., the second unidirectional conductive element mentioned above), a diode 125 (i.e., the third unidirectional conductive element mentioned above), and a control pin 1. The first P-type transistor 121 has an emitter E1, a base B1, and a collector C1, and the N-type transistor 122 has an emitter E2, a base B2, and a collector C2. The first end 111 of the instrument panel circuit 110 is connected to the emitter E1 of the first P-type transistor 121, the base B1 of the first P-type transistor 121 is connected to the anode of the diode 123, the collector C1 of the first P-type transistor 121 is connected to the anode of the diode 125, the cathode of the diode 123 is connected to the collector C2 of the N-type transistor 122, the emitter E2 of the N-type transistor 122 is connected to the anode of the diode 125, the base B2 of the N-type transistor 122 is connected to the control pin 1, and the cathode of the diode 125 is connected to the second end 112 of the instrument panel circuit 110.

[0062] In some specific implementations, the diode 123 may be one diode or multiple diodes. When the diode 123 is multiple diodes, the diodes in the multiple diodes are connected in parallel and / or in series in a manner that the positive electrode of one diode is connected to the negative electrode of another diode. When the diode 125 is multiple diodes, the diodes in the multiple diodes are connected in parallel and / or in series in a manner that the positive electrode of one diode is connected to the negative electrode of another diode.

[0063] When the battery 100 is reversely connected to the first terminal 111 and the second terminal 112 of the instrument panel circuit 110, that is, the positive electrode 101 of the battery 100 is connected to the second terminal 112 of the instrument panel circuit 110, and the negative electrode 102 of the battery 100 is connected to the first terminal 111 of the instrument panel circuit 110, the diode 125 blocks the current from flowing through the N-type transistor 122 and the first P-type transistor 121, and the diode 123 blocks the current from flowing through the first P-type transistor 121, thereby blocking the current from flowing back to the battery 100. In some specific implementations, the current flows from the positive electrode 101 of the battery 100 through the second terminal 112 of the instrument panel circuit 110 into the instrument panel circuit 110. Since the diode 125 has the characteristic of not conducting reverse current, only a very small part of the current or even no current flows to the N-type transistor 122 and the first P-type transistor 121. Even if a small part of the current flowing through the N-type transistor 122 flows to the diode 123, since the diode 123 has the characteristic of not conducting reverse current, almost no current flows back to the battery 100. In this way, the forward conduction and reverse blocking characteristics of the diode are utilized to prevent the reverse current from flowing into the N-type transistor 122, prevent the reverse current from flowing into the first P-type transistor 121, and prevent the reverse current from flowing back to the battery 100, thereby reducing the impact of the reverse current caused by the reverse connection of the battery 100 on the chip connected to the instrument panel circuit 110 and other circuits powered by the battery 100.

[0064] Therefore, by providing a unidirectional conductive element between the first terminal 111 and the second terminal 112 of the instrument panel circuit 110, when the battery is reversely connected to the first terminal 111 and the second terminal 112 of the instrument panel circuit 110, the unidirectional conductive element can prevent the current from flowing back to the battery 100 via the instrument panel circuit. In this way, by utilizing the unidirectional conductive property of the unidirectional conductive element, the influence of the reverse current caused by the reverse connection of the battery 100 on the circuit powered by the battery 100 can be reduced. In addition, since the cost of the diode is relatively low, the manufacturing cost of the instrument panel circuit can be reduced.

[0065] The present application embodiment provides a chip, wherein a Figure 4-Figure 10 Any of the circuits shown.

[0066] This embodiment is a chip implementation method corresponding to the above circuit embodiment. This embodiment can be implemented in conjunction with the anti-reverse connection circuit implementation method. The relevant technical details mentioned in the circuit implementation method are still valid in this embodiment. In order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the circuit implementation method.

[0067] An embodiment of the present application provides an electronic device, which may include the above-mentioned chip.

[0068] This embodiment is an electronic device implementation corresponding to the above circuit embodiment, and this embodiment can be implemented in conjunction with the anti-reverse connection circuit implementation. The relevant technical details mentioned in the circuit implementation are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the circuit implementation.

[0069] The electronic device mentioned in the present application is introduced below. It can be understood that the electronic device can be any electronic device including the above-mentioned anti-reverse connection circuit. But not limited to: mobile phones (including foldable screen mobile phones and straight-screen mobile phones), tablet computers, desktop computers, handheld computers, notebook computers, ultra-mobile personal computers (UMPC), netbooks, personal digital assistants (personal digital assistants), tablet computers (portable android devices, PAD), personal digital assistants (personal digital assistants, PDA), handheld devices with wireless communication functions, computing devices, vehicle-mounted devices or wearable devices, virtual reality (virtual reality, VR) terminal devices, augmented reality (augmented reality, AR) terminal devices, wireless terminals in industrial control (industrial control), wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and other mobile terminals or fixed terminals, power banks and other electronic devices with data transmission synchronization requirements.

[0070] It should be noted that in the examples and description of this patent, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0071] Although the present application has been illustrated and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present application.

Claims

1. A reverse connection protection circuit, characterized in that: including unidirectional conductive elements and instrument panel circuits; The instrument panel circuit includes a first P-type transistor, an N-type transistor, a first end, and a second end, wherein the base of the first P-type transistor is connected to the collector of the N-type transistor, the emitter of the first P-type transistor is connected to the first end, the emitter of the N-type transistor is connected to the second end, and the first end and the second end are used to be connected to a battery; The one-way conductive element is disposed in the instrument panel circuit between the first end and the second end, and is used to prevent current from flowing back to the battery through the instrument panel circuit when the battery is reversely connected to the first end and the second end.

2. The circuit according to claim 1, characterized in that The unidirectional conductive element includes a first unidirectional conductive element, one end of the first unidirectional conductive element is connected to the first end, and the other end of the first unidirectional conductive element is connected to the emitter of the first P-type transistor.

3. The circuit according to claim 1, characterized in that The unidirectional conductive element comprises a second unidirectional conductive element, one end of the second unidirectional conductive element is connected to the base of the first P-type transistor, and the other end of the second unidirectional conductive element is connected to the collector of the N-type transistor.

4. The circuit according to claim 2, characterized in that The unidirectional conductive element comprises a second unidirectional conductive element, one end of the second unidirectional conductive element is connected to the base of the first P-type transistor, and the other end of the second unidirectional conductive element is connected to the collector of the N-type transistor.

5. The circuit according to claim 1, characterized in that The unidirectional conductive element comprises a third unidirectional conductive element, one end of the third unidirectional conductive element is connected to the second end, and the other end of the third unidirectional conductive element is connected to the emitter of the N-type transistor.

6. The circuit according to claim 2, characterized in that The unidirectional conductive element comprises a third unidirectional conductive element, one end of the third unidirectional conductive element is connected to the second end, and the other end of the third unidirectional conductive element is connected to the emitter of the N-type transistor.

7. The circuit according to claim 3, characterized in that The unidirectional conductive element comprises a third unidirectional conductive element, one end of the third unidirectional conductive element is connected to the second end, and the other end of the third unidirectional conductive element is connected to the emitter of the N-type transistor.

8. The circuit according to claim 4, characterized in that The unidirectional conductive element comprises a third unidirectional conductive element, one end of the third unidirectional conductive element is connected to the second end, and the other end of the third unidirectional conductive element is connected to the emitter of the N-type transistor.

9. The circuit according to any one of claims 1 to 8, characterized in that: The unidirectional conductive element is a second P-type transistor or a diode.

10. A chip, characterized in that: The chip is formed with an anti-reverse connection circuit as described in any one of claims 1 to 9.

11. An electronic device, characterized in that: Comprising the chip as claimed in claim 10.

Images