High-isolation optocoupler device with strong anti-interference capability

Abstract

The utility model discloses a high isolation optocoupler with strong anti-interference capability, which relates to the technical field of optocouplers and comprises a packaging shell made of metal materials, the inner wall of the packaging shell is coated with a layer of wave-absorbing materials, the wave-absorbing materials are ferrite wave-absorbing materials, and the inner wall of the packaging shell is coated with a layer of wave-absorbing materials. A light-emitting diode and a photoelectric detector are arranged on the two sides of the interior of the packaging shell respectively, the light-emitting diode and the photoelectric detector are isolated through a multi-layer isolation structure, and the multi-layer isolation structure comprises a first insulation isolation layer and a second insulation isolation layer; according to the utility model, the metal packaging shell is adopted and the wave-absorbing material is coated, so that external electromagnetic interference can be effectively blocked and absorbed, and the surfaces of the pins are plated with the anti-interference coatings; the arrangement of the optical lens improves the stability of optical signals, a multi-layer isolation structure is adopted between the light-emitting diode and the photoelectric detector, the electrical isolation degree between the light-emitting diode and the photoelectric detector is remarkably improved, and electrical coupling between input and output is reduced.

Description

Technical Field

[0001] This utility model relates to the field of optocoupler technology, specifically a high-isolation optocoupler with strong anti-interference capability. Background Technology

[0002] Optocouplers, as important electronic components, play a crucial role in signal isolation and level conversion. However, existing optocouplers have certain shortcomings in terms of anti-interference capability and isolation. In complex electromagnetic environments, external electromagnetic interference can easily enter the optocoupler through various pathways, affecting its normal operation and leading to a decrease in the accuracy and stability of signal transmission. Furthermore, the internal isolation structure of existing optocouplers is not perfect, resulting in a certain degree of electrical coupling between the input and output, thus reducing the isolation effect.

[0003] Therefore, those skilled in the art have provided a high-isolation optocoupler device with strong anti-interference capability to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a high-isolation optocoupler with strong anti-interference capability to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-isolation optocoupler with strong anti-interference capability includes a package shell made of metal and in the shape of a cuboid. The inner wall of the package shell is coated with a ferrite absorbing material. A light-emitting diode and a photodetector are respectively disposed on both sides inside the package shell. The light-emitting diode and the photodetector are isolated by a multi-layer isolation structure, which consists of a first insulating isolation layer and a second insulating isolation layer.

[0007] As a further embodiment of this utility model: the first insulating layer is made of silicon dioxide and is located on the side of the light-emitting diode close to the photodetector; the second insulating layer is made of silicon nitride and is located on the side of the photodetector close to the light-emitting diode.

[0008] As a further embodiment of this utility model: a first light-transmitting channel and a second light-transmitting channel are respectively formed on the first insulating layer and the second insulating layer, and the first light-transmitting channel, the second light-transmitting channel, the light-emitting diode, and the photodetector are located on the same axis.

[0009] As a further improvement of this utility model: an air isolation layer is formed between the first insulating layer and the second insulating layer, and an optical lens is provided thereon.

[0010] As a further embodiment of this utility model: input pins and output pins are fixedly connected to the outer walls of both sides of the package shell, the input pins are connected to the light-emitting diode, and the output pins are connected to the photodetector.

[0011] As a further improvement of this utility model: the surfaces of the input pin and the output pin are plated with an anti-interference coating, which is a nickel-gold coating, first plated with a layer of nickel as the base layer, and then plated with a layer of gold.

[0012] As a further improvement of this utility model: the top of the encapsulation shell is provided with heat dissipation fins, and the heat dissipation fins are integrally formed with the encapsulation shell.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Strong anti-interference capability: It adopts a metal encapsulation shell and is coated with absorbing material, which can effectively block and absorb external electromagnetic interference, and the pin surface is coated with an anti-interference coating; the setting of optical lens improves the stability of optical signal and reduces the impact of external interference on optical signal.

[0015] 2. High isolation: The light-emitting diode and the photodetector adopt a multi-layer isolation structure, which significantly improves the electrical isolation between them and reduces the electrical coupling between the input and output.

[0016] 3. Good heat dissipation performance: The heat dissipation fins on the top of the package can dissipate the heat generated by the optocoupler during operation in a timely manner, ensuring that the optocoupler operates in a stable temperature environment, thereby improving its reliability and anti-interference ability. Attached Figure Description

[0017] Fig. 1 This is a schematic diagram of the overall structure of a high-isolation optocoupler with strong anti-interference capability.

[0018] Fig. 2 This is a front view of a high-isolation optocoupler device with strong anti-interference capability.

[0019] Fig. 3 This is a schematic diagram of the inner wall structure of the package shell in a high-isolation optocoupler device with strong anti-interference capability.

[0020] In the diagram: 1. Package housing; 2. Heat sink fins; 3. Input pin; 4. Output pin; 5. Nickel-gold coating; 6. Light-emitting diode; 7. Photodetector; 8. First insulating layer; 9. Second insulating layer; 10. First light-transmitting channel; 11. Second light-transmitting channel; 12. Optical lens; 13. Ferrite absorbing material. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Reference Figs. 1-3 This embodiment provides a high-isolation optocoupler device with strong anti-interference capability, including a package shell 1. The package shell 1 is made of metal and has an overall cuboid shape. The metal package shell 1 can form a Faraday cage, effectively blocking external electromagnetic interference and providing a good electromagnetic shielding environment for internal components. The inner wall of the package shell 1 is coated with a layer of absorbing material, which is ferrite absorbing material 13. The absorbing material can absorb residual electromagnetic interference waves entering the package shell 1, further enhancing the anti-interference capability. Light-emitting diodes 6 and photodetectors 7 are respectively arranged on both sides inside the package shell 1. The light-emitting diodes 6 and photodetectors 7 are isolated by a multi-layer isolation structure, which is a first insulating isolation layer 8 and a second insulating isolation layer 9.

[0024] Example 2

[0025] Reference Figs. 1-3 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that the first insulating layer 8 is made of silicon dioxide and is located on the side of the light-emitting diode 6 near the photodetector 7, which can effectively block the direct transmission of electrical signals. The second insulating layer 9 is made of silicon nitride and is located on the side of the photodetector 7 near the light-emitting diode 6. Together with the first insulating layer 8, it significantly improves the electrical isolation between the light-emitting diode 6 and the photodetector 7.

[0026] Furthermore, a first light-transmitting channel 10 and a second light-transmitting channel 11 are respectively formed on the first insulating isolation layer 8 and the second insulating isolation layer 9. The first light-transmitting channel 10, the second light-transmitting channel 11, the light-emitting diode 6, and the photodetector 7 are located on the same axis. An air isolation layer is formed between the first insulating isolation layer 8 and the second insulating isolation layer 9. The air isolation layer has good insulation performance, which further enhances the isolation effect. An optical lens 12 is provided in the air isolation layer. The optical lens 12 can accurately focus the light emitted by the light-emitting diode 6 onto the photodetector 7, improve the light transmission efficiency and stability, reduce the scattering and reflection of the light signal, and reduce the influence of external interference on the light signal. By setting the light-emitting diode 6 and the photodetector 7 coaxially and making the optical lens 12 and the light-transmitting channels of each insulating isolation layer on the same axis, it can ensure that the light propagates in a straight line along the axis, minimize the scattering and loss of light during transmission, improve the transmission efficiency of light from the light-emitting diode 6 to the photodetector 7, and thus improve the performance of the optocoupler.

[0027] Furthermore, input pins 3 and output pins 4 are fixedly connected to the outer walls of both sides of the package housing 1. The input pins 3 are connected to the light-emitting diode 6, and the output pins 4 are connected to the photodetector 7. The surfaces of the input pins 3 and the output pins 4 are coated with an anti-interference coating. The anti-interference coating is a nickel-gold coating 5, in which a layer of nickel is first plated as the base layer, and then a layer of gold is plated on top. The anti-interference coating can reduce the electromagnetic coupling between the pins and the external environment and improve the anti-interference capability of the pins.

[0028] Furthermore, the top of the packaging shell 1 is provided with heat dissipation fins 2, which are integrally formed with the packaging shell 1. This increases the heat dissipation area, dissipates the heat generated by the optocoupler during operation in a timely manner, ensures that the optocoupler operates in a stable temperature environment, and improves its reliability and anti-interference ability.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-isolation optocoupler with strong anti-interference capability, comprising a package housing (1), characterized in that, The encapsulation shell (1) is made of metal and has a rectangular shape. The inner wall of the encapsulation shell (1) is coated with a layer of absorbing material, which is ferrite absorbing material (13). Light-emitting diodes (6) and photodetectors (7) are respectively arranged on both sides inside the encapsulation shell (1). The light-emitting diodes (6) and photodetectors (7) are isolated by a multi-layer isolation structure, which is a first insulating isolation layer (8) and a second insulating isolation layer (9).

2. The high-isolation optocoupler with strong anti-interference capability according to claim 1, characterized in that, The first insulating layer (8) is made of silicon dioxide and is located on the side of the light-emitting diode (6) close to the photodetector (7). The second insulating layer (9) is made of silicon nitride and is located on the side of the photodetector (7) close to the light-emitting diode (6).

3. The high-isolation optocoupler with strong anti-interference capability according to claim 2, characterized in that, The first insulating layer (8) and the second insulating layer (9) are respectively provided with a first light-transmitting channel (10) and a second light-transmitting channel (11). The first light-transmitting channel (10), the second light-transmitting channel (11), the light-emitting diode (6), and the photodetector (7) are located on the same axis.

4. The high-isolation optocoupler with strong anti-interference capability according to claim 3, characterized in that, An air isolation layer is formed between the first insulating layer (8) and the second insulating layer (9), and an optical lens (12) is provided thereon.

5. The high-isolation optocoupler with strong anti-interference capability according to claim 1, characterized in that, The two outer walls of the encapsulation shell (1) are respectively fixedly connected to an input pin (3) and an output pin (4). The input pin (3) is connected to a light-emitting diode (6), and the output pin (4) is connected to a photodetector (7).

6. The high-isolation optocoupler with strong anti-interference capability according to claim 5, characterized in that, The surfaces of the input pin (3) and the output pin (4) are plated with an anti-interference coating, which is a nickel-gold coating (5), first a layer of nickel is plated as the bottom layer, and then a layer of gold is plated on top.

7. The high-isolation optocoupler with strong anti-interference capability according to claim 1, characterized in that, The top of the encapsulation shell (1) is provided with heat dissipation fins (2), and the heat dissipation fins (2) are integrally formed with the encapsulation shell (1).

Images