Discrete

Abstract

The utility model discloses a splitter, which comprises a plastic package body, a frame and a power chip, the frame comprises a base island and a plurality of pins, the base island is arranged in the plastic package body, the surface of one side of the base island is flush with the surface of one side of the plastic package body in a first direction, and the plurality of pins are all positioned on one side of the plastic package body in a second direction; the plurality of pins comprise a first pin and a plurality of second pins, the first pin is located among the plurality of second pins in the third direction, one end of the first pin extends into the plastic package body to be connected with the base island, and the other end of the first pin is connected with one of the plurality of second pins; one end of each second pin extends into the plastic package body and is separated from the base island; the power chip is arranged on the base island. According to the discrete device provided by the embodiment of the utility model, a TO-247-3L frame can be adopted to process the discrete device, so that the discrete device and the TO-247-3L can share a production line, the frequency of die replacement of the production line can be reduced, the utilization rate of equipment is improved, and the production efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of discrete devices, in particular to a discrete device. Background Art

[0002] In the related technology, TO-247 series packages are widely used in practical applications due to their large core area, excellent heat dissipation performance and high mechanical stability. However, in actual production, TO-247-3L and TO-247-2L use special equipment and jigs for core placement, wire bonding, packaging, rib cutting and other processes, which will increase the number of mold changes or jig burden on the production line, reducing the production efficiency of the entire production line. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a discrete device, so that the discrete device and TO-247-3L can share the same production line, thereby reducing the frequency of mold replacement in the production line, improving the utilization rate of the equipment, and greatly improving production efficiency.

[0004] According to the discrete device of the embodiment of the utility model, it includes: a plastic package body; a frame, the frame includes a base island and a plurality of pins, the base island is arranged in the plastic package body, one side surface of the base island is flush with one side surface of the plastic package body in a first direction, and the plurality of pins are all located on one side of the plastic package body in a second direction; wherein the plurality of pins include a first pin and a plurality of second pins, in a third direction the first pin is located between the plurality of second pins, one end of the first pin extends into the plastic package body and is connected to the base island, the other end of the first pin is connected to one of the plurality of second pins, one end of each of the second pins extends into the plastic package body and is spaced apart from the base island, and the first direction, the second direction and the third direction are orthogonal to each other; a power chip, the power chip is arranged on the base island.

[0005] According to the discrete device of the embodiment of the utility model, the first pin is located between the plurality of second pins, and one end of the first pin is inserted into the plastic package body and connected to the base island, the other end of the first pin is connected to one of the plurality of second pins, and one end of each second pin is inserted into the plastic package body and separated from the base island. Therefore, the discrete device can be processed using the TO-247-3L frame, so that the discrete device and TO-247-3L can share the same production line, thereby reducing the frequency of mold replacement in the production line, improving the utilization rate of the equipment, and greatly improving production efficiency.

[0006] According to some embodiments of the present invention, the first pin includes: a first connecting section, the first connecting section extends along the second direction, one end of the first connecting section extends into the plastic package body and is connected to the base island; a second connecting section, the second connecting section extends along the third direction, and both ends of the second connecting section are respectively connected to the first connecting section and one of the multiple second pins.

[0007] According to some embodiments of the present invention, the width of the first connecting segment in the third direction gradually decreases in a direction away from the base island.

[0008] According to some embodiments of the present invention, the width of the first connecting segment in the third direction is W1, and the width of the second connecting segment in the second direction is W2, wherein W1 and W2 satisfy: W1≥W2.

[0009] According to some embodiments of the present invention, a plurality of first grooves are formed on the plastic packaging body, and the plurality of first grooves are respectively located on both sides of the plastic packaging body in the third direction, and a portion of the base island is exposed in the first grooves.

[0010] According to some embodiments of the present invention, a plurality of second grooves are formed on the base island, and the plurality of second grooves are respectively located on both sides of the base island in the third direction, and the second grooves are opposite to the corresponding first grooves in the first direction.

[0011] According to some embodiments of the present invention, a plurality of second grooves located on the same side of the base island in the third direction are spaced apart along the second direction, and a portion of the surface of the base island in the third direction is recessed toward the central axis of the base island to form the second groove.

[0012] According to some embodiments of the present invention, the inner peripheral wall of each of the second grooves is in an arc shape.

[0013] According to some embodiments of the present invention, the minimum distance between two adjacent second grooves located on the same side of the base island in the third direction in the second direction is L, wherein L satisfies: 2mm≤L≤3mm.

[0014] According to some embodiments of the present invention, the depth of the second groove in the first direction is smaller than the thickness of the base island.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic diagram of a T0-247-3L frame of a discrete device according to an embodiment of the present utility model;

[0018] Figure 2 is a schematic diagram of a frame of a discrete device according to an embodiment of the utility model;

[0019] Figure 3 yes Figure 2 A front view of the frame of the discrete device shown;

[0020] Figure 4 is a schematic diagram of a discrete device frame and a power chip according to an embodiment of the utility model;

[0021] Figure 5 is a schematic diagram of a discrete device according to an embodiment of the utility model;

[0022] Figure 6 A schematic diagram of a frame of a discrete device according to another embodiment of the present invention;

[0023] Figure 7 yes Figure 6 A front view of the frame of the discrete device shown;

[0024] Figure 8 is a schematic diagram of a discrete device frame and a power chip according to another embodiment of the utility model;

[0025] Fig. 9 It is a schematic diagram of a discrete device according to another embodiment of the utility model.

[0026] Reference numerals:

[0027] 100: Discrete device;

[0028] 10: plastic package; 101: first groove; 20: frame; 201: base island; 2011: second groove; 202: pin; 203: first pin; 2031: first connecting section; 2032: second connecting section; 204: second pin; 2041: first sub-pin; 2042: second sub-pin; 2043: groove; 30: power chip; 40: bonding wire. DETAILED DESCRIPTION

[0029] Reference below Figure 1-Figure 9 A discrete device 100 according to an embodiment of the present invention is described.

[0030] like Figure 1-Figure 9As shown, the discrete device 100 according to the embodiment of the present invention includes: a plastic package 10 , a frame 20 and a power chip 30 .

[0031] Specifically, the frame 20 includes a base island 201 and a plurality of pins. In the description of the present utility model, the meaning of "plurality" is two or more. The base island 201 is arranged in the plastic package 10 and is arranged in a first direction (for example, Figure 1 One side surface of the base island 201 is flush with one side surface of the plastic package body 10, and the plurality of pins are located on the plastic package body 10 in the second direction (for example, Figure 1 The plurality of pins include a first pin 203 and a plurality of second pins 204, and in a third direction (for example, Figure 1 The first pin 203 is located between the plurality of second pins 204 in the left-right direction (in the left-right direction), one end of the first pin 203 extends into the plastic package 10 and is connected to the base island 201, the other end of the first pin 203 is connected to one of the plurality of second pins 204, one end of each second pin 204 extends into the plastic package 10 and is spaced apart from the base island 201, and the first direction, the second direction and the third direction are orthogonal to each other. , the power chip 30 is arranged on the base island 201.

[0032] It should be noted that the first direction may be a thickness direction of the frame 20 , the second direction may be a length direction of the frame 20 , and the third direction may be a width direction of the frame 20 .

[0033] For example, in Figure 2-Figure 9 In the example, the shape of the plastic package 10 and the base island 201 is roughly rectangular, and the power chip 30 is arranged in the thickness direction of the base island 201 (for example, Figure 1 The plastic package 10 is wrapped around the periphery of the base island 201 to separate the power chip 30 from the outside and prevent moisture from entering the plastic package 10. Three pins are provided on one side of the length direction of the base island 201, one of the three pins is a first pin 203, and the remaining two pins are second pins 204. The first sub-pin 2041 of the two second pins 204 is located on the left side of the base island 201, and the second sub-pin 2042 of the two second pins 204 is located on the right side of the base island 201. The first pin 203 is located in the middle of the base island 201.

[0034] Among them, one end of the first pin 203 extending into the plastic package 10 is connected to the base island 201, and the other end of the first pin 203 is connected to the first sub-pin 2041 and is located outside the plastic package 10, and the first sub-pin 2041 and the second sub-pin 2042 are not connected to the base island 201. The power chip 30 is connected to the second sub-pin 2042 through the bonding wire 40. Therefore, the structure of the frame 20 is similar to the structure of the frame 20 of TO-247-3L, which is conducive to processing the frame 20 of the discrete device 100 through the frame 20 of TO-247-3L.

[0035] Specifically, refer to Figure 1 During processing, the power chip 30 can be fixed on the base island 201 of the frame 20 of TO-247-3L by solder paste, and then the power chip 30 and the corresponding pin (i.e., the second sub-pin 2042) are connected by bonding wires 40, and then the plastic encapsulation is performed to form a plastic encapsulation body 10 on the periphery of the base island 201, and finally the frame 20 of TO-247-3L is cut, for example, along Figure 1 The thick solid line in the figure cuts off the lower part of the middle pin and the connecting part of the middle pin and the right pin to obtain the discrete device 100, so that only the cutter position of the rib cutting mold can be replaced, and the frame 20 of TO-247-3L can be used to process the discrete device 100, which reduces the frequency of fixture replacement in the core mounting, wire bonding, and plastic packaging processes, so that the discrete device 100 and TO-247-3L can share the production line, improve the utilization rate of the equipment, and greatly improve production efficiency.

[0036] In addition, by making the back side of the base island 201 flush with one side surface of the plastic package body 10 in the thickness direction, that is, the back side of the base island 201 is in an exposed state, when the discrete device 100 is working, the heat generated by the power chip 30 can be directly transferred to the outside through the back side of the base island 201, so that the thermal resistance of the discrete device 100 is small and the heat dissipation efficiency is high.

[0037] According to the discrete device 100 of the embodiment of the utility model, the first pin 203 is located between the plurality of second pins 204, and one end of the first pin 203 is inserted into the plastic package 10 and connected to the base island 201, and the other end of the first pin 203 is connected to one of the plurality of second pins 204, and one end of each second pin 204 is inserted into the plastic package 10 and is separated from the base island 201. Therefore, the discrete device 100 can be processed using the frame 20 of TO-247-3L, so that the discrete device 100 and TO-247-3L can share the same production line, thereby reducing the frequency of replacing molds in the production line, improving the utilization rate of the equipment, and greatly improving the production efficiency.

[0038] According to some embodiments of the present invention, the first pin 203 includes a first connecting section 2031 and a second connecting section 2032. The first connecting section 2031 extends along the second direction, and one end of the first connecting section 2031 extends into the plastic package body 10 and is connected to the base island 201. The second connecting section 2032 extends along the third direction, and the two ends of the second connecting section 2032 are respectively connected to the first connecting section 2031 and one of the plurality of second pins 204. Figure 2-Figure 9 As shown, in the length direction of the base island 201, the first connecting section 2031 extends in a direction away from the base island 201, the second connecting section 2032 is connected between the first connecting section 2031 and the first sub-pin 2041, and the second connecting section 2032 extends in the width direction of the base island 201, so that the shape of the first pin 203 is L-shaped. Therefore, while ensuring that one of the plurality of second pins 204 is connected to the base island 201, it is convenient to use the TO-247-3L frame 20 to process the discrete device 100, thereby reducing production costs and improving production efficiency.

[0039] Further, refer to Figure 3 , Figure 4 , Figure 7 and Figure 8 , the width of the first connecting segment 2031 in the third direction gradually decreases in the direction away from the base island 201. That is, in the second direction, the width of the end of the first connecting segment 2031 adjacent to the base island 201 is larger, and the width of the end of the first connecting segment 2031 away from the base island 201 is smaller. In this way, the connection area between the first connecting segment 2031 and the base island 201 can be increased, so that the connection reliability between the base island 201 and the first connecting segment 2031 can be ensured.

[0040] According to some embodiments of the present invention, Figure 3 As shown, the width of the first connecting segment 2031 in the third direction is W1, and the width of the second connecting segment 2032 in the second direction is W2, wherein W1 and W2 satisfy: W1≥W2. When W1<W2, since the width of the first connecting segment 2031 is small, the connection area between the first connecting segment 2031 and the base island 201 will be reduced, thereby affecting the connection reliability between the first connecting segment 2031 and the base island 201. Therefore, by making the width of the first connecting segment 2031 in the third direction greater than the width of the second connecting segment 2032 in the second direction, while ensuring the connection reliability between the first connecting segment 2031 and the base island 201, the material usage of the frame 20 can be reduced, thereby reducing the cost.

[0041] According to some embodiments of the present invention, a plurality of first grooves 101 are formed on the plastic package body 10, and the plurality of first grooves 101 are respectively located on both sides of the plastic package body 10 in the third direction, and a portion of the base island 201 is exposed in the first grooves 101. Figure 5 and Fig. 9 In the example, first grooves 101 are formed on both sides of the plastic package body 10 in the width direction, and part of the surface of the plastic package body 10 in the width direction is recessed inward to form the first grooves 101, and the side of each first groove 101 away from the pin in the length direction of the plastic package body 10 is spaced from the upper edge of the plastic package body 10. During plastic packaging, the mold passes through the two first grooves 101 and stops against the base island 201 to ensure the stability of the frame 20 during plastic packaging and prevent glue overflow from the back of the plastic package body 10.

[0042] Furthermore, a plurality of second grooves 2011 are formed on the base island 201, and the plurality of second grooves 2011 are respectively located on both sides of the base island 201 in the third direction, and the second grooves 2011 are opposite to the corresponding first grooves 101 in the first direction. Figure 6-Figure 9 As shown, two second grooves 2011 are respectively formed on both sides of the base island 201 in the width direction, so that the edge of the base island 201 exposed at the first groove 101 is wavy. During plastic sealing, the second grooves 2011 have a guiding function, which is beneficial to the flow of the plastic sealing material, so that the plastic sealing material and the base island 201 are more closely combined, thereby improving the connection reliability between the base island 201 and the plastic sealing body 10.

[0043] Figure 6 Four second grooves 2011 are shown for illustrative purposes, but after reading the technical solution of the present application, ordinary technicians can obviously understand that the solution can be applied to technical solutions with other numbers of second grooves 2011, which also falls within the protection scope of the present utility model.

[0044] Furthermore, refer to Figure 6-Figure 9 , a plurality of second grooves 2011 located on the same side of the base island 201 in the third direction are spaced apart along the second direction, and a portion of the surface of the base island 201 in the third direction is recessed in a direction toward the central axis of the base island 201 to form the second groove 2011. For example, two second grooves 2011 are formed on one side in the width direction of the base island 201, and the two second grooves 2011 are spaced apart in the length direction of the base island 201, and each second groove 2011 is formed by recessing a portion of the surface of the base island 201 in the width direction toward the center of the base island 201. Therefore, the second grooves 2011 have a simple structure and are easy to process.

[0045] In some optional embodiments, the inner circumferential wall of each second groove 2011 is in an arc shape.

[0046] According to some embodiments of the present invention, Figure 6As shown, the minimum distance between two adjacent second grooves 2011 located on the same side of the base island 201 in the third direction in the second direction is L, where L satisfies: 2mm≤L≤3mm. When L<2mm, the minimum distance between two adjacent second grooves 2011 is small, which is inconvenient to process; when L>3mm, the minimum distance between two adjacent second grooves 2011 is large, and due to the limited size of the first groove 101, the number of second grooves 2011 in the first groove 101 is small, which will affect the flow of the molding compound to a certain extent. Therefore, by making L satisfy 2mm≤L≤3mm, on the one hand, it is beneficial to the processing of the second groove 2011; on the other hand, in the limited space of the first groove 101, it can be ensured that all the second grooves 2011 are located in the second groove 2011, which is beneficial to the flow of the molding compound, thereby improving the connection reliability between the molding body 10 and the base island 201.

[0047] According to some embodiments of the present invention, Figure 6 and Figure 7 As shown, in the first direction, the depth of the second groove 2011 is less than the thickness of the base island 201. That is, in the first direction, the second groove 2011 does not penetrate the base island 201. During plastic packaging, the mold can pass through the first groove 101 and the second groove 2011 and stop against the base island 201, ensuring the stability of the frame 20 during plastic packaging and preventing glue overflow from the back of the plastic packaging body 10.

[0048] In some optional embodiments, a plurality of grooves 2043 are formed on the second pin 204, and the plurality of grooves 2043 are located in the plastic package body 10 and spaced apart along the length direction of the base island 201, and each groove 2043 extends along the width direction of the base island 201. Figure 1-Figure 9 , two grooves 2043 are formed on each second pin 204, the two grooves 2043 are arranged adjacent to one end of the second pin 204 extending into the plastic package body 10, and the two grooves 2043 are evenly spaced apart along the length direction of the second pin 204. During plastic packaging, the plastic packaging material can fill a plurality of grooves 2043, thereby increasing the connection reliability between the second pin 204 and the plastic package body 10. Optionally, the cross-section of the groove 2043 may be in a V-shape, but is not limited thereto.

[0049] Other structures and operations of the separator 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0050] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0053] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A discrete device, characterized in that: include: Plastic sealing body; A frame, the frame comprising a base island and a plurality of pins, the base island being arranged in the plastic package, a surface of one side of the base island in a first direction being flush with a surface of one side of the plastic package, and the plurality of pins being located on one side of the plastic package in a second direction; The plurality of pins include a first pin and a plurality of second pins, the first pin is located between the plurality of second pins in the third direction, one end of the first pin extends into the plastic package body and is connected to the base island, the other end of the first pin is connected to one of the plurality of second pins, one end of each of the second pins extends into the plastic package body and is spaced apart from the base island, and the first direction, the second direction and the third direction are orthogonal to each other; A power chip is arranged on the base island.

2. The discrete device according to claim 1, characterized in that: The first pin comprises: A first connecting section, the first connecting section extending along the second direction, one end of the first connecting section extending into the plastic package body and connected to the base island; A second connecting section, wherein the second connecting section extends along the third direction, and two ends of the second connecting section are respectively connected to the first connecting section and one of the plurality of second pins.

3. The discrete device according to claim 2, characterized in that: The width of the first connecting section in the third direction gradually decreases in a direction away from the base island.

4. The discrete device according to claim 2, characterized in that: The width of the first connecting segment in the third direction is W1, and the width of the second connecting segment in the second direction is W2, wherein W1 and W2 satisfy: W1≥W2.

5. The discrete device according to any one of claims 1 to 4, characterized in that: A plurality of first grooves are formed on the plastic packaging body, and the plurality of first grooves are respectively located on both sides of the plastic packaging body in the third direction, and a portion of the base island is exposed in the first grooves.

6. The discrete device according to claim 5, characterized in that: A plurality of second grooves are formed on the base island, and the plurality of second grooves are respectively located at two sides of the base island in the third direction, and the second grooves are opposite to the corresponding first grooves in the first direction.

7. The discrete device according to claim 6, characterized in that: A plurality of second grooves located on the same side of the base island in the third direction are spaced apart along the second direction, and a portion of the surface of the base island in the third direction is recessed toward the central axis of the base island to form the second groove.

8. The discrete device according to claim 6, characterized in that: The inner peripheral wall of each of the second grooves is in an arc shape.

9. The discrete device according to claim 6, characterized in that: The minimum distance between two adjacent second grooves located on the same side of the base island in the third direction in the second direction is L, wherein L satisfies: 2mm≤L≤3mm.

10. The discrete device according to claim 6, characterized in that: A depth of the second groove in the first direction is smaller than a thickness of the base island.

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