Light-controlled drive circuit, solid-state relay, semiconductor device

Abstract

This invention discloses a light-controlled driving circuit, a solid-state relay, and a semiconductor device. The driving circuit includes a first circuit and a second circuit. The first circuit includes a light-emitting element; the second circuit includes a first connection terminal, a second connection terminal, a light-receiving element, and a switching element. One end of the light-receiving element is connected to the control terminal of the switching element, and the other end of the light-receiving element is connected to the second connection terminal. The first switching terminal of the switching element is connected to the first connection terminal, and the second switching terminal of the switching element is connected to the second connection terminal. The light-controlled driving circuit designed with the above scheme can realize the switching element's conduction or deactivation through light control, effectively overcoming the problem of existing solid-state relay drive control being susceptible to interference.

Description

Technical Field

[0001] This application relates to the field of chip circuits, specifically to a light-controlled driving circuit, a solid-state relay, and a semiconductor device. Background Technology

[0002] Solid-state relays (SSRs) are a new type of contactless switching device composed entirely of solid-state electronic components. Utilizing the switching characteristics of electronic components (such as switching transistors and triacs), they achieve contactless and spark-free connection and disconnection of circuits, hence the name "contactless switch." A solid-state relay is a four-terminal active device, with two terminals as input control terminals and the other two as output control terminals. It provides both amplification and isolation, making it well-suited for driving high-power switching actuators. Compared to electromagnetic relays, it offers higher reliability, is contactless, has a long lifespan, high speed, and is less susceptible to external interference, leading to its widespread application.

[0003] The driving circuit principle in existing solid-state relays is to generate magnetism by energizing the coil to turn the switch on or off. This method has the disadvantages of low isolation and susceptibility to interference. Summary of the Invention

[0004] In view of the above problems, this application provides a light-controlled drive circuit, a solid-state relay, and a semiconductor device to solve the problem that the drive circuit control in existing solid-state relays is susceptible to interference.

[0005] To achieve the above objectives, in a first aspect, this application provides a light-controlled driving circuit, including a first circuit and a second circuit;

[0006] The first circuit includes a light-emitting element, the light-emitting element being turned on or off by a first signal supplied to the first circuit;

[0007] The second circuit includes a first connection terminal (or a third connection terminal), a second connection terminal, a light-receiving element, and a switching element;

[0008] The light-receiving element is used to receive the light emitted by the light-emitting element and perform photoelectric conversion;

[0009] One end of the light-receiving element is connected to the control terminal of the switching element, and the other end of the light-receiving element is connected to the second connection terminal; the first switching terminal of the switching element is connected to the first connection terminal or the third connection terminal, and the second switching terminal of the switching element is connected to the second connection terminal.

[0010] In some embodiments, the light-receiving element is a PVG photovoltaic cell.

[0011] In some embodiments, the light-emitting element is a light-emitting diode.

[0012] In a second aspect, this application also provides a light-controlled driving circuit, including a first circuit and a second circuit;

[0013] The first circuit includes a light-emitting element, the light-emitting element being turned on or off by a first signal supplied to the first circuit;

[0014] The second circuit includes: a first connection terminal, a second connection terminal, a third connection terminal, a light-receiving element group, a first switching element, and a second switching element;

[0015] The light-receiving element group includes a first light-receiving element and a second light-receiving element, which are connected in series. The first light-receiving element and the second light-receiving element are respectively used to receive the light emitted by the light-emitting element and perform photoelectric conversion; the second connection terminal is also connected between the first light-receiving element and the second light-receiving element.

[0016] The first switching element includes a first control terminal, a first switch terminal, and a second switch terminal. The first control terminal is connected to the first light-receiving element, the first switch terminal is connected to the second connection terminal, and the second switch terminal is connected to the first connection terminal.

[0017] The second switching element includes a second control terminal, a third switching terminal, and a fourth switching terminal. The second control terminal is connected to the second light-receiving element, the third switching terminal is connected to the second connection terminal, and the fourth switching terminal is connected to the third connection terminal.

[0018] In some embodiments, the first switching element includes a first GaN switch, the first GaN switch is an E-MODE type GaN switch, the first control terminal is the gate of the first GaN switch, the first switching terminal is the source of the first GaN switch, and the second switching terminal is the drain of the first GaN switch.

[0019] In some embodiments, the first switching element includes a MOSFET switch group and a first GaN switch;

[0020] The MOSFET switch group includes a MOSFET and a parasitic diode. The parasitic diode is connected in parallel between the source and drain of the MOSFET, and the conduction direction is from the source to the drain of the MOSFET. The source of the MOSFET is connected to the second connection terminal, and the gate of the MOSFET is connected to the first light-receiving element.

[0021] The first GaN switch is a D-MODE type GaN switch. The source of the first GaN switch is connected to the first connection terminal, the gate of the first GaN switch is connected to the second connection terminal, and the drain of the first GaN switch is connected to the drain of the MOS transistor.

[0022] In some embodiments, the second switching element includes a second GaN switch, the second GaN switch being a D-MODE type GaN switch, the second control terminal being the gate of the second GaN switch, the third switching terminal being the source of the second GaN switch, and the fourth switching terminal being the drain of the second GaN switch.

[0023] In some embodiments, there are multiple second circuits, each of which is independently configured and controlled by the same set of control signals, and the first connection terminal and the second connection terminal in the multiple second circuits are simultaneously connected or disconnected.

[0024] The first circuit consists of one unit, and multiple light-receiving element groups in the second circuit are used to receive light emitted by the light-emitting element in the same first circuit and perform photoelectric conversion.

[0025] In a third aspect, this application also provides a solid-state relay, including a housing and a light-controlled drive circuit;

[0026] The light control driving circuit is disposed inside the housing and is the light control driving circuit as described in the first and second aspects of this application.

[0027] In a fourth aspect, this application also provides a semiconductor device, including a solid-state relay and a processor;

[0028] The solid-state relay is the solid-state relay as described in the third aspect;

[0029] The processor is electrically connected to the solid-state relay and is used to send a first signal to the solid-state relay.

[0030] Unlike existing technologies, the above-mentioned technical solution involves a light-controlled driving circuit, a solid-state relay, and a semiconductor device. The driving circuit includes a first circuit and a second circuit. The first circuit includes a light-emitting element; the second circuit includes a first connection terminal, a second connection terminal, a light-receiving element, and a switching element. One end of the light-receiving element is connected to the control terminal of the switching element, and the other end of the light-receiving element is connected to the second connection terminal. The first switching terminal of the switching element is connected to the first connection terminal, and the second switching terminal of the switching element is connected to the second connection terminal. The light-controlled driving circuit designed by the above solution can realize the conduction or shutdown of the switching element through light control, effectively overcoming the problem of easy interference in the driving control of existing solid-state relays.

[0031] The above description of the invention is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0032] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0033] In the accompanying drawings of the instruction manual:

[0034] Figure 1 This is a schematic diagram of the structure of the first type of light-controlled driving circuit according to the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of the second type of light-controlled driving circuit involved in the present invention;

[0036] Figure 3 This is a schematic diagram of the structure of the third type of light-controlled driving circuit involved in the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the fourth type of light-controlled driving circuit involved in the present invention;

[0038] Figure 5 This is a schematic diagram of the structure of the fifth type of light-controlled driving circuit according to the present invention;

[0039] Figure 6 This is a schematic diagram of the structure of the sixth type of light-controlled driving circuit according to the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of a solid-state relay according to another embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the structure of a semiconductor device according to another embodiment of the present invention;

[0042] The reference numerals used in the above figures are explained as follows:

[0043] 1. First circuit;

[0044] 2. Second circuit; 201. Second circuit A; 202. Second circuit B;

[0045] 21. First connection end;

[0046] 22. Second connection end;

[0047] 23. Third connection end;

[0048] 24. Switching elements;

[0049] 241. First GaN switch;

[0050] 242. Second GaN switch;

[0051] 25. Light-receiving element;

[0052] 251. First light-receiving element;

[0053] 252. Second light-receiving element;

[0054] 26. MOSFET switching group;

[0055] 261. MOSFET;

[0056] 262. Parasitic diode;

[0057] 27. Light-emitting element;

[0058] 3. Solid-state relays;

[0059] 31. Shell;

[0060] 32. Light-controlled drive circuit;

[0061] 4. Semiconductor devices;

[0062] 41. Processor. Detailed Implementation

[0063] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0064] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0065] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0066] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0067] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0068] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0069] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0070] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0071] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a mechanical connection, a link, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0072] Please see Figure 1 and Figure 2 As shown, in a first aspect, this application provides a light-controlled driving circuit, including a first circuit 1 and a second circuit 2;

[0073] The first circuit 1 includes a light-emitting element 27, and the light-emitting element 27 is turned on or off by a first signal supplied to the first circuit 1; the second circuit 2 includes a first connection terminal 21 (or a third connection terminal 23), a second connection terminal 22, a light-receiving element 25, and a switching element 24; the light-receiving element 25 is used to receive light emitted by the light-emitting element and perform photoelectric conversion; one end of the light-receiving element 25 is connected to the control terminal of the switching element 24, and the other end of the light-receiving element 25 is connected to the second connection terminal 22; the first switching terminal of the switching element 24 is connected to the first connection terminal 21 or the third connection terminal 23, and the second switching terminal of the switching element 24 is connected to the second connection terminal 22.

[0074] In this embodiment, the switching element 24 can be a D-MODE type GaN switch or an E-MODE type GaN switch.

[0075] like Figure 1 As shown, when the switching element 24 is a D-MODE type GaN switch, the control terminal of the switching element 24 is the gate of the D-MODE type GaN switch, the first switching terminal of the switching element 24 is the source of the switching element 24, the source of the switching element 24 is connected to the third connection terminal 23, and the second switching terminal of the switching element 24 is the drain of the switching element 24.

[0076] like Figure 2 As shown, when the switching element 24 is an E-MODE type GaN switch, the control terminal of the switching element 24 is the gate of the E-MODE type GaN switch, the first switching terminal of the switching element 24 is the drain of the switching element 24, the drain of the switching element 24 is connected to the first connection terminal 21, and the second switching terminal of the switching element 24 is the source of the switching element 24.

[0077] In this embodiment, the first signal can be a low-voltage DC pulse signal. After passing through the light-emitting element 27, the low-voltage DC pulse signal turns on the light-emitting element 27. The light emitted by the light-emitting element 27 undergoes photoelectric conversion through the light-receiving element 25. The converted voltage signal causes the switching element 24 to conduct, that is... Figure 1 The third connection terminal 23 and the second connection terminal 22 are connected or Figure 2 The first connection terminal 21 and the second connection terminal 22 are connected, allowing bidirectional current to flow. When the light-receiving element 25 does not receive a light signal, the switching element 24 is open. Figure 1 The third connection terminal 23 and the second connection terminal 22 are disconnected or Figure 2 The first connection terminal 21 and the second connection terminal 22 are disconnected. In this way, by setting the light-emitting element 27 and the light-receiving element 25, the switching element can be turned on or off by light control, thus improving the anti-interference capability.

[0078] In this embodiment, the light-receiving element 25 is a PVG photovoltaic cell. A photovoltaic cell is a semiconductor device that generates an electromotive force (EMF) under light irradiation. It is a device capable of generating an EMF under light irradiation. The light-receiving element 25 uses a PVG photovoltaic cell, which can directly generate an EMF under external light (such as sunlight), thereby driving the switching element. This eliminates the need for an additional load power supply to drive the GaN power transistor, effectively simplifying the hardware structure and reducing hardware costs.

[0079] In some embodiments, the light-emitting element is a light-emitting diode (LED). In other embodiments, the light-emitting element may also be an electroluminescent element such as an OLED (OrGaNic Light Emitting Diode).

[0080] In the second aspect, such as Figure 3 and Figure 4 As shown, this application also provides a light-controlled driving circuit, including a first circuit 1 and a second circuit 2;

[0081] The first circuit 1 includes a light-emitting element 27, and the light-emitting element 27 is turned on or off by a first signal supplied to the first circuit 1.

[0082] The second circuit 2 includes a first connection terminal 21, a second connection terminal 22, a third connection terminal 23, a light-receiving element group, a first switching element, and a second switching element;

[0083] The first switching element includes a first control terminal, a first switch terminal, and a second switch terminal. The first control terminal is connected to the first light-receiving element, the first switch terminal is connected to the second connection terminal, and the second switch terminal is connected to the first connection terminal.

[0084] The second switching element includes a second control terminal, a third switching terminal, and a fourth switching terminal. The second control terminal is connected to the second light-receiving element, the third switching terminal is connected to the second connection terminal, and the fourth switching terminal is connected to the third connection terminal.

[0085] like Figure 3 As shown, the first switching element includes a MOS transistor switch group 26 and a first GaN switch 241;

[0086] The MOSFET switch group 26 includes a MOSFET 261 and a parasitic diode 262. The parasitic diode 262 is connected in parallel between the source and drain of the MOSFET 261, and the conduction direction is from the source of the MOSFET 261 to the drain of the MOSFET 261. The source of the MOSFET 261 is also connected to the second connection terminal 22, and the gate of the MOSFET 261 is also connected to the first light-receiving element 251.

[0087] The first GaN switch 241 is a D-MODE type GaN switch. The source of the first GaN switch 241 is connected to the first connection terminal, the gate of the first GaN switch 241 is connected to the second connection terminal, and the drain of the first GaN switch 241 is connected to the drain of the MOS transistor.

[0088] like Figure 4 As shown, in some other embodiments, the first switching element includes a first GaN switch 241, the first GaN switch is an E-MODE type GaN switch, the first control terminal is the gate of the first GaN switch 241, the first switching terminal is the source of the first GaN switch 241, and the second switching terminal is the drain of the first GaN switch 241.

[0089] like Figure 3 and Figure 4 As shown, in some embodiments, the second switching element includes a second GaN switch 242, which is a D-MODE type GaN switch. The second control terminal is the gate of the second GaN switch 242, the third switching terminal is the source of the second GaN switch 242, and the fourth switching terminal is the drain of the second GaN switch 242.

[0090] pass Figure 3 and Figure 4The light-controlled driving circuit shown can realize the function of a single-channel double-pole electronic switch. The first signal can be a low-voltage DC pulse signal. After the low-voltage DC pulse signal passes through the light-emitting element 27, the light-emitting element 27 is turned on. The light emitted by the light-emitting element 27 is photoelectrically converted by the first light-receiving element 251 and the second light-receiving element 252, thereby realizing the asynchronous operation of the first GaN switch 241 and the second GaN switch 242.

[0091] Specifically, when the light-emitting element 27 does not supply light signals to the first light-receiving element 251 and the second light-receiving element 252, the second GaN switch 242 is turned on and the first GaN switch 241 is turned off. At this time, the current can flow bidirectionally between the third connection terminal 23 (normally closed node) and the second connection terminal 22 (i.e., common connection terminal), while the first connection terminal 21 (normally open node) and the second connection terminal 22 (i.e., common connection terminal) are in a closed state.

[0092] When the light-emitting element 27 supplies light signals to the first light-receiving element 251 and the second light-receiving element 252, the second GaN switch 242 is turned off and the first GaN switch 241 is turned on. At this time, the current can flow bidirectionally between the first connection terminal 21 (normally open node) and the second connection terminal 22 (i.e., common connection terminal), and the third connection terminal 23 (normally closed node) and the second connection terminal 22 (i.e., common connection terminal) are in the off state.

[0093] like Figure 5 and Figure 6 As shown, in some embodiments, there are multiple second circuits, which are independently configured and controlled by the same set of control signals. The first connection terminals and second connection terminals in the multiple second circuits are simultaneously connected or disconnected. Preferably, there is one first circuit, and the light-receiving element groups in the multiple second circuits are respectively used to receive the light emitted by the light-emitting element in the same first circuit and perform photoelectric conversion.

[0094] pass Figure 5 and Figure 6 The light-controlled driving circuit shown can realize the function of two double-pole double-throw electronic switches. The first signal can be a low-voltage DC pulse signal. After the low-voltage DC pulse signal passes through the light-emitting element 27, the light-emitting element 27 is turned on. The light emitted by the light-emitting element 27 is photoelectrically converted by the first light-receiving element 251 and the second light-receiving element 252 in the two second circuits, thereby realizing the asynchronous operation of the first GaN switch 241 and the second GaN switch 242 in the two circuits.

[0095] For ease of explanation, Figure 5 or Figure 6The two second circuits are labeled as second circuit A (201) and second circuit B (202). When the light-emitting element 27 does not supply light signals to the first light-receiving element 251 and the second light-receiving element 252 in second circuit A (201) and the first light-receiving element 251 and the second light-receiving element 252 in second circuit B (202), the second GaN switch 242 in second circuit A (201) is turned on and the first GaN switch 241 is turned off. At this time, the current can flow bidirectionally between the third connection terminal 23 (normally closed node) and the second connection terminal 22 (i.e., common connection terminal) in second circuit A (201), and the first connection terminal 21 (normally open node) and the second connection terminal 22 (i.e., common connection terminal) in second circuit A (201) are in the off state. Similarly, in the second circuit B (202), the second GaN switch 242 is turned on and the first GaN switch 241 is turned off. At this time, the current can flow bidirectionally between the third connection terminal 23 (normally closed node) and the second connection terminal 22 (i.e., common connection terminal) in the second circuit B (202), while the first connection terminal 21 (normally open node) and the second connection terminal 22 (i.e., common connection terminal) in the second circuit B (202) are in the off state.

[0096] When the light-emitting element 27 supplies light signals to the first light-receiving element 251 and the second light-receiving element 252 in the second circuit A (201) and the second circuit B (202), the second GaN switch 242 in the second circuit A (201) is turned off and the first GaN switch 241 is turned on. At this time, the current can flow bidirectionally between the first connection terminal 21 (normally open node) and the second connection terminal 22 (i.e., common connection terminal) in the second circuit A (201), and is in a closed state between the third connection terminal 23 (normally closed node) and the second connection terminal 22 (i.e., common connection terminal) in the second circuit A (201). Similarly, the second GaN switch 242 in the second circuit B (202) is open, and the first GaN switch 241 is on. At this time, the current can flow bidirectionally between the first connection terminal 21 (normally open node) and the second connection terminal 22 (i.e., common connection terminal) in the second circuit B (202), and is in a closed state between the third connection terminal 23 (normally closed node) and the second connection terminal 22 (i.e., common connection terminal) in the second circuit B (202).

[0097] In this embodiment, the first light-receiving element 251 and the second light-receiving element 252 are PVG photovoltaic cells. A photovoltaic cell is a semiconductor device that generates an electromotive force (EMF) under light irradiation. It is a device capable of generating an EMF under light irradiation. The first light-receiving element 251 and the second light-receiving element 252 use PVG photovoltaic cells, which can directly generate an EMF under external light (such as sunlight), thereby driving the GaN switch. This eliminates the need for an additional load power supply to drive the GaN power transistor, effectively simplifying the hardware structure and reducing hardware costs.

[0098] In the third aspect, such as Figure 7 As shown, this application also provides a solid-state relay 3, including a housing 31 and a light-controlled driving circuit 32; the light-controlled driving circuit 32 is disposed inside the housing 31 and is the light-controlled driving circuit 32 as described in the first and second aspects of this application.

[0099] Solid-state relays can also be called wireless relays. For example, solid-state relays include PhotoMOS relays that use MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors).

[0100] In the fourth aspect, such as Figure 8 As shown, this application also provides a semiconductor device 4, including a solid-state relay 3 and a processor 41; the solid-state relay 3 is as described in the third aspect; the processor 41 is electrically connected to the solid-state relay 3 and is used to send a first signal to the solid-state relay 3. The processor 41 includes, but is not limited to, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an MCU (Microprocessor Unit), etc. The semiconductor device 4 can be an electronic device, such as a host computer.

[0101] This invention discloses a light-controlled driving circuit, a solid-state relay, and a semiconductor device. The driving circuit includes a first circuit and a second circuit. The first circuit includes a light-emitting element; the second circuit includes a first connection terminal, a second connection terminal, a light-receiving element, and a switching element. One end of the light-receiving element is connected to the control terminal of the switching element, and the other end of the light-receiving element is connected to the second connection terminal. The first switching terminal of the switching element is connected to the first connection terminal, and the second switching terminal of the switching element is connected to the second connection terminal. The light-controlled driving circuit designed with the above scheme can realize the switching element's conduction or deactivation through light control, effectively overcoming the problem of existing solid-state relay drive control being susceptible to interference.

[0102] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A light-controlled driving circuit, characterized in that, include: A first circuit includes a light-emitting element, the light-emitting element being turned on or off by a first signal supplied to the first circuit; The second circuit includes: First connecting end, second connecting end, and third connecting end; A light-receiving element group includes a first light-receiving element and a second light-receiving element connected in series. The first light-receiving element and the second light-receiving element are respectively used to receive light emitted by the light-emitting element and perform photoelectric conversion. The second connection terminal is also connected between the first light-receiving element and the second light-receiving element. A first switching element includes a first control terminal, a first switch terminal and a second switch terminal. The first control terminal is connected to the first light-receiving element, the first switch terminal is connected to the second connection terminal, and the second switch terminal is connected to the first connection terminal. The second switching element includes a second control terminal, a third switching terminal, and a fourth switching terminal. The second control terminal is connected to the second light-receiving element, the third switching terminal is connected to the second connection terminal, and the fourth switching terminal is connected to the third connection terminal. The first switching element includes a first GaN switch, which is an E-MODE type GaN switch. The first control terminal is the gate of the first GaN switch, the first switching terminal is the source of the first GaN switch, and the second switching terminal is the drain of the first GaN switch. The first light-receiving element is a PVG photovoltaic cell, which is used to directly generate an electromotive force under sunlight to drive the first GaN switch to work. The second light-receiving element is a PVG photovoltaic cell, which is used to directly generate an electromotive force under sunlight to drive the second GaN switch to work.

2. The light-controlled driving circuit as described in claim 1, characterized in that, The first switching element includes: A MOSFET switch group includes a MOSFET and a parasitic diode. The parasitic diode is connected in parallel between the source and drain of the MOSFET, and the conduction direction is from the source to the drain of the MOSFET. The source of the MOSFET is connected to the second connection terminal, and the gate of the MOSFET is connected to the first light-receiving element. The first GaN switch is a D-MODE type GaN switch. The source of the first GaN switch is connected to the first connection terminal, the gate of the first GaN switch is connected to the second connection terminal, and the drain of the first GaN switch is connected to the drain of the MOS transistor.

3. The light-controlled driving circuit as described in claim 1, characterized in that, The second switching element includes a second GaN switch, which is a D-MODE type GaN switch. The second control terminal is the gate of the second GaN switch, the third switching terminal is the source of the second GaN switch, and the fourth switching terminal is the drain of the second GaN switch.

4. The light-controlled driving circuit as described in claim 1, characterized in that, There are multiple second circuits, each independently configured and controlled by the same set of control signals, and the first connection terminal and the second connection terminal in the multiple second circuits are simultaneously connected or disconnected. The first circuit consists of one unit, and multiple light-receiving element groups in the second circuit are used to receive light emitted by the light-emitting element in the same first circuit and perform photoelectric conversion.

5. The light-controlled driving circuit as described in claim 1, characterized in that, The light-emitting element is a light-emitting diode.

6. A solid-state relay, characterized in that, include; case; A light-controlled driving circuit is disposed within the housing and is the light-controlled driving circuit as described in any one of claims 1 to 5.

7. A semiconductor device, characterized in that, include: The solid-state relay is the solid-state relay as described in claim 6; The processor, electrically connected to the solid-state relay, is used to send a first signal to the solid-state relay.

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