Rectifier bridge pile with internal jumper piece type and external terminal
By adopting the design of internal chip-hopping external terminals in the rectifier bridge stack, the chip is subject to stress and complicated use by end customers during welding, achieving higher mechanical strength and a wider range of applications.
Patent Information
- Application Number
- CN202421096127.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-20
AI Technical Summary
During the welding process of tunnel furnaces, the chips are subjected to stress due to the expansion and contraction of the frame, and end customers need cumbersome terminal installation processes when using them.
Adopting the design of internal chip jump type external terminals, the rectifier chip is placed on the upper surface of the frame unit, and overlapping is achieved through chip jump, reducing stress during welding, and allowing terminal customers to directly use pins in the form of terminals. Press the wire into the terminal.
It reduces stress during welding, simplifies the use process of end customers, reduces production costs, and improves the mechanical strength and wide application of rectifier bridge stacks.
Smart Images
Figure CN222483376U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of semiconductor components, in particular to an internal jump-chip type rectifier bridge stack with external self-contained terminals. Background Art
[0002] As a commonly used power electronic device, the rectifier bridge is used to convert alternating current into direct current.
[0003] Some existing rectifier bridge stacks place chips on both sides of the lead frame at the same time. However, in this overlapping welding method of the upper and lower pieces, the expansion and contraction of the frame caused by the changes in furnace temperature during the tunnel furnace welding process affects the stress on the chip. At the same time, when using some existing rectifier bridge stacks, end customers need to press the terminals onto the wires first and then press the terminals onto the rectifier bridge pins, which is a cumbersome process. Utility Model Content
[0004] The technical problem to be solved by the utility model is: to provide a rectifier bridge stack with an internal jumper and external terminals, wherein all rectifier chips are placed on the upper surface of a frame unit and are connected by jumpers. During the welding process in a tunnel furnace, the jumpers fall on the surface of the rectifier chips due to natural gravity and are not affected by the stress borne by the chips due to the expansion and contraction of the frame caused by changes in furnace temperature. At the same time, the pins are in the form of terminals, and end customers can directly press the wires into the terminals during use, eliminating the complicated process of first pressing the terminals onto the wires and then pressing the terminals onto the pins of the rectifier bridge.
[0005] The technical solution adopted by the utility model is: an internal jumper type rectifier bridge stack with external terminals, comprising a plastic package shell, a frame unit group consisting of a first frame unit, a second frame unit, a third frame unit and a fourth frame unit, terminals led out from the frame units of the frame unit group, four rectifier chips arranged on the upper surface of the frame units of the frame unit group and four jumpers for overlapping;
[0006] The terminals include a first input terminal and a second input terminal located on one side of the plastic-encapsulated housing and a first output terminal and a second output terminal located on the other side of the plastic-encapsulated housing.
[0007] The first input terminal is led out from the first frame unit, the second input terminal is led out from the second frame unit, the first output terminal is led out from the third frame unit, and the second output terminal is led out from the fourth frame unit;
[0008] The four frame units of the frame unit group are coplanar, and the frame units, rectifier chips and jumper chips form a stacked structure.
[0009] The upper surfaces of the four frame units of the frame unit group are respectively provided with two pads, the upper surfaces of the first frame unit and the second frame unit are respectively provided with a rectifier chip, and the upper surface of the fourth frame unit is provided with two rectifier chips, and the negative pole of the rectifier chip is arranged on the pad.
[0010] The two ends of the first jumper are connected to the positive electrode of the rectifier chip of the first frame unit and a pad of the third frame unit respectively.
[0011] The two ends of the second jumper are respectively connected to a pad of the first frame unit and a rectifier chip of the fourth frame unit.
[0012] The two ends of the third jumper are connected to the positive electrode of the rectifier chip of the second frame unit and another pad of the third frame unit respectively.
[0013] The two ends of the fourth jumper are respectively connected to a pad of the second frame unit and another rectifier chip of the fourth frame unit.
[0014] The first jump sheet, the second jump sheet, the third jump sheet and the fourth jump sheet are arranged in parallel from top to bottom;
[0015] The terminal comprises a horizontal section and extension sections connected to both sides of the horizontal section, and the value range of the angle α generated between the extension section and the horizontal section is 100-120°.
[0016] Furthermore, the jumper chip includes a connecting section and a pad welding section and a chip welding section connected to both sides of the connecting section.
[0017] The pad welding section extends downward from the connecting section and is welded to the pad, and the chip welding section extends downward from the connecting section and is welded to the rectifier chip. The contact area between the pad welding section and the pad is 2-4 times the contact area between the chip welding section and the rectifier chip.
[0018] Furthermore, the connection sections of the four jump chips, namely the first jump chip, the second jump chip, the third jump chip and the fourth jump chip, are coplanar.
[0019] Furthermore, the first input terminal is led out from the first frame unit near the rectifier chip, the second input terminal is led out from the second frame unit near the pad, the first output terminal is led out from the third frame unit near the pad connected to the first frame unit, and the second output terminal is led out from the fourth frame unit near the rectifier chip connected to the second frame unit.
[0020] Furthermore, the first input terminal and the first output terminal are symmetrically arranged on both sides of the plastic package housing, and the second input terminal and the second output terminal are symmetrically arranged on both sides of the plastic package housing.
[0021] Furthermore, a boss is provided on an upper surface of the plastic package housing on one side close to the first output terminal and the second output terminal.
[0022] Furthermore, an anti-stretching hole is provided at one end of the terminal lead frame unit, and a limiting column fixedly connected to the plastic package shell is provided in the anti-stretching hole.
[0023] Specifically, the upper and lower end surfaces of the limiting column are connected to the inner wall of the plastic shell.
[0024] Specifically, the limiting column adopts a tubular structure, the upper and lower end surfaces of the plastic shell are connected to form an integrated structure at the limiting column through the limiting column, and the limiting column is arranged flush with the upper and lower end surfaces of the plastic shell.
[0025] Compared with the prior art, the utility model has the following advantages: the rectifier bridge stack of the utility model places all rectifier chips on the upper surface of the frame unit, and the lap connection is achieved through the jumper. During the tunnel furnace welding process, the jumper falls on the surface of the rectifier chip by natural gravity, and is not affected by the stress of the chip caused by the expansion and contraction of the frame caused by the high and low changes in the furnace temperature. The overall layout is more reasonable. Compared with the overlapping welding of the upper and lower pieces in the prior art, the volume of copper materials used is reduced, the stress in the welding process is reduced, the plane space occupied by the device is more reasonable, and it is more conducive to the miniaturization of the product, and the wide application of the product is expanded; at the same time, the pin adopts the terminal form, and the end customer can directly press the wire into the terminal during use, eliminating the complicated process of pressing the terminal on the wire first and then pressing the terminal on the rectifier bridge pin; the colloid surface is provided with a boss, which is convenient for the end customer to identify the polarity during the production of the automated equipment; the frame size design is more reasonable, so the number of rectifier chip sizes that can be packaged by the same group of lead frames is increased, the compatibility is wider, and the production cost is reduced; the external force tensile strength of the terminal is enhanced through the anti-stretching hole, and the stress damage to the rectifier chip caused by external force pulling is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0027] Figure 1 It is a structural schematic diagram of the utility model;
[0028] Figure 2 It is a schematic diagram of the internal structure of the utility model;
[0029] Figure 3 This utility model Figure 2A schematic diagram of the structure from another angle;
[0030] Figure 4 This utility model Figure 1 A schematic diagram of the structure from a second angle;
[0031] Figure 5 This utility model Figure 1 Schematic diagram of the structure from the third angle.
[0032] Numbers in the figure: 1-terminal, 101-horizontal section, 102-extension section, 103-anti-stretching hole, 11-first input terminal, 12-second input terminal, 13-first output terminal, 14-second output terminal, 2-plastic package shell, 21-boss, 3-rectifier chip, 4-jump chip, 41-connection section, 42-pad welding section, 43-chip welding section, 5-first frame unit, 6-second frame unit, 7-third frame unit, 8-fourth frame unit. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] like Figure 1-Figure 5 The rectifier bridge stack with an internal jumper and external self-contained terminals shown in the figure comprises a plastic package housing 2, a frame unit group consisting of a first frame unit 5, a second frame unit 6, a third frame unit 7 and a fourth frame unit 8, terminals 1 drawn from the frame units of the frame unit group, four rectifier chips 3 arranged on the upper surface of the frame units of the frame unit group, and four jumpers 4 for lap connection. All rectifier chips are placed on the upper surface of the frame unit and lap-connected through jumpers. During the tunnel furnace welding process, the jumpers fall on the surface of the rectifier chips by natural gravity, and are not affected by the stress on the chips caused by the expansion and contraction of the frame caused by the change of furnace temperature.
[0035] The terminal 1 includes a first input terminal 11 and a second input terminal 12 located on one side of the plastic-encapsulated housing 2 and a first output terminal 13 and a second output terminal 14 located on the other side of the plastic-encapsulated housing 2.
[0036] That is, the input terminal and the output terminal are located on both sides of the plastic package housing 2, which has the following advantages:
[0037] It can more effectively utilize the internal space of the equipment, make the circuit layout more reasonable, reduce internal crowding, and help improve the overall performance and stability of the equipment; it can reduce the mutual interference between different signal lines and improve the purity of signal transmission; for some terminals or connectors that generate heat, placing them on both sides of the shell can help dissipate heat and prevent heat accumulation, thereby improving the stability and service life of the equipment; making the equipment easier to maintain and upgrade; it can make the appearance of the equipment more neat and orderly, avoiding the mess caused by all terminals being concentrated in one place.
[0038] The first input terminal 11 is led out from the first frame unit 5, the second input terminal 12 is led out from the second frame unit 6, the first output terminal 13 is led out from the third frame unit 7, and the second output terminal 14 is led out from the fourth frame unit 8;
[0039] The four frame units of the frame unit group are coplanar, and the frame unit, the rectifier chip 3 and the jumper chip 4 form a stacked structure.
[0040] The upper surfaces of the four frame units of the frame unit group are respectively provided with two pads, the upper surfaces of the first frame unit 5 and the second frame unit 6 are respectively provided with a rectifier chip 3, and the upper surface of the fourth frame unit 8 is provided with two rectifier chips 3, and the negative electrode of the rectifier chip 3 is arranged on the pad.
[0041] The two ends of the first jumper 4 are respectively connected to the positive electrode of the rectifier chip 3 of the first frame unit 5 and a pad of the third frame unit 7.
[0042] The two ends of the second jumper 4 are respectively connected to a pad of the first frame unit 5 and a rectifier chip 3 of the fourth frame unit 8.
[0043] The two ends of the third jumper 4 are respectively connected to the positive electrode of the rectifier chip 3 of the second frame unit 6 and another pad of the third frame unit 7.
[0044] The two ends of the fourth jumper 4 are respectively connected to a pad of the second frame unit 6 and another rectifier chip 3 of the fourth frame unit 8.
[0045] The first jumper 4, the second jumper 4, the third jumper 4 and the fourth jumper 4 are arranged in parallel from top to bottom. The four jumpers 4 are arranged in parallel to reduce the inductance inside the rectifier bridge, because the current path is more direct, which is conducive to reducing the magnetic field generated by the AC current when passing through the rectifier bridge, thereby reducing the inductive effect and improving the rectification efficiency. The parallel arrangement of the jumpers can increase its current carrying capacity, because the current can be more evenly distributed on each jumper, reducing the risk of local overheating. Since the current distribution is more even, the heat can also be dissipated more effectively, which helps to improve the heat dissipation effect of the rectifier bridge and improve its service life and stability. The jumpers arranged in parallel are also more stable in mechanics, can better support and fix the diodes, and improve the mechanical strength of the entire rectifier bridge. The jumpers arranged in parallel are easier to realize automated assembly during the production process, improve production efficiency, and reduce labor costs and error rates.
[0046] like Figure 5 As shown, the terminal 1 includes a horizontal section 101 and an extension section 102 connected to both sides of the horizontal section 101. The angle α generated between the extension section 102 and the horizontal section 101 has a value range of 100-120°. The end customer can directly press the wire into the slot formed by the extension section 102 and the horizontal section 101 of the terminal 1 during use, eliminating the complicated process of first pressing the terminal onto the wire and then pressing the terminal onto the rectifier bridge pin. If the angle is too large or too small, an effective slot for placing the wire cannot be formed. The slightly outwardly expanded extension section 102, due to the unique bevel design, can produce a self-locking effect, making the connection more stable, while making the terminal easy to wire, and providing a larger contact area, thereby reducing contact resistance and improving the electrical performance of the connection.
[0047] like Figure 3 As shown, the jumper 4 includes a connecting section 41 and a pad welding section 42 and a chip welding section 43 connected to both sides of the connecting section 41.
[0048] The pad welding section 42 extends downward from the connecting section 41 and is welded to the pad, and the chip welding section 43 extends downward from the connecting section 41 and is welded to the rectifier chip 3; when extended, the pad welding section 42 and the chip welding section 43 present a "Z"-shaped structure, and a chamfered structure is adopted at the corners. On the one hand, it will not cause an increase in product thickness, and on the other hand, it increases flexibility, improves heat dissipation performance, and is more mechanically stable. At the same time, it can shorten the current path and reduce the inductance generated when the AC current passes through the jumper, thereby improving the rectification efficiency.
[0049] The contact area between the pad welding section 42 and the pad is 2-4 times the contact area between the chip welding section 43 and the rectifier chip 3. Adjusting the contact area between the jumper and the pad and the rectifier chip can optimize the current distribution, reduce the risk of local overheating, and improve the overall current carrying capacity and system stability.
[0050] The connecting sections 41 of the four jump plates 4 are coplanar.
[0051] The first input terminal 11 is led out from the first frame unit 5 near the rectifier chip 3, the second input terminal 12 is led out from the second frame unit 6 near the pad, the first output terminal 13 is led out from the third frame unit 7 near the pad connected to the first frame unit 5, and the second output terminal 14 is led out from the fourth frame unit 8 near the rectifier chip 3 connected to the second frame unit 6.
[0052] The first input terminal 11 and the first output terminal 13 are symmetrically arranged on both sides of the plastic package housing 2 , and the second input terminal 12 and the second output terminal 14 are symmetrically arranged on both sides of the plastic package housing 2 .
[0053] A boss 21 is provided on the upper surface of the plastic package housing 2 on one side close to the first output terminal 13 and the second output terminal 14 , so as to facilitate polarity identification during production by the terminal customer's automated equipment.
[0054] One end of the terminal 1 leading out of the frame unit is provided with an anti-stretching hole 103, and a limiting column fixedly connected to the plastic package housing 2 is provided in the anti-stretching hole 103. The anti-stretching hole enhances the external tensile strength of the terminal and reduces the stress damage to the rectifier chip caused by external force pulling.
[0055] The upper and lower end surfaces of the limiting column are connected to the inner wall of the plastic housing 2. The limiting column is integrally formed with the plastic housing 2 during injection molding.
[0056] The preparation of the rectifier bridge stack includes the following steps:
[0057] Rectifier bridge positioning: First, place the rectifier bridge at the predetermined position in the injection mold;
[0058] Injection molding: Next, with the mold closed, molten plastic is injected into the mold. The plastic forms a shell around the rectifier bridge, sealing it inside;
[0059] Curing: After the plastic is injected into the mold, it needs to remain closed for a period of time so that the plastic can fully cure and form a strong shell;
[0060] Demolding: After the plastic is solidified, open the mold and take out the plastic package with the encapsulated rectifier bridge;
[0061] Post-processing: Perform some post-processing operations, such as removing burrs or flash, to ensure that the plastic package has good appearance and dimensional accuracy.
[0062] Through the above process, the rectifier bridge is encapsulated in the plastic shell, forming a protective barrier to prevent external factors such as moisture, vibration, etc. from damaging the rectifier bridge and improve its electrical performance and mechanical strength.
[0063] Ordinary AC power is input from the first frame unit 5 and the second frame unit 6, respectively, and outputs "-" DC power to the third frame unit 7 and "+" DC power to the fourth frame unit 8. When in use, the customer presses the AC wire into the first input terminal 11 and the second input terminal 12 of the AC input end, and presses the DC wire into the first output terminal 13 and the second output terminal 14 to achieve the purpose of converting AC power into DC power.
[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A rectifier bridge stack with internal jumper and external terminals, characterized in that: It comprises a plastic-encapsulated housing (2), a frame unit group consisting of a first frame unit (5), a second frame unit (6), a third frame unit (7) and a fourth frame unit (8), terminals (1) led out from the frame units of the frame unit group, four rectifier chips (3) arranged on the upper surfaces of the frame units of the frame unit group, and four jumper chips (4) for overlapping; The terminal (1) comprises a first input terminal (11) and a second input terminal (12) located on one side of the plastic-encapsulated housing (2), and a first output terminal (13) and a second output terminal (14) located on the other side of the plastic-encapsulated housing (2). The first input terminal (11) is led out from the first frame unit (5), the second input terminal (12) is led out from the second frame unit (6), the first output terminal (13) is led out from the third frame unit (7), and the second output terminal (14) is led out from the fourth frame unit (8); The four frame units of the frame unit group are coplanar, and the frame units, the rectifier chip (3) and the jumper chip (4) form a stacked structure. The upper surfaces of the four frame units of the frame unit group are each provided with two welding pads, the upper surfaces of the first frame unit (5) and the second frame unit (6) are each arranged with a rectifier chip (3), and the upper surface of the fourth frame unit (8) is arranged with two rectifier chips (3), and the negative poles of the rectifier chips (3) are arranged on the welding pads.
2. The internal jumper type rectifier bridge stack with external terminals according to claim 1, characterized in that: The two ends of the first jumper (4) are respectively connected to the positive electrode of the rectifier chip (3) of the first frame unit (5) and a pad of the third frame unit (7). Two ends of the second jumper (4) are respectively connected to a pad of the first frame unit (5) and a rectifier chip (3) of the fourth frame unit (8), The two ends of the third jumper (4) are respectively connected to the positive electrode of the rectifier chip (3) of the second frame unit (6) and another pad of the third frame unit (7). Two ends of the fourth jumper (4) are respectively connected to a pad of the second frame unit (6) and another rectifier chip (3) of the fourth frame unit (8), The first jump plate (4), the second jump plate (4), the third jump plate (4) and the fourth jump plate (4) are arranged in parallel in sequence from top to bottom.
3. The internal jumper type rectifier bridge stack with external terminals according to claim 1, characterized in that: The jumper (4) comprises a connecting section (41) and a pad welding section (42) and a chip welding section (43) connected to both sides of the connecting section (41). The pad welding section (42) extends downward from the connecting section (41) and is welded to the pad, and the chip welding section (43) extends downward from the connecting section (41) and is welded to the rectifier chip (3), and the contact area between the pad welding section (42) and the pad is 2-4 times the contact area between the chip welding section (43) and the rectifier chip (3).
4. The internal jump chip type rectifier bridge stack with external terminals according to claim 3, characterized in that: The connecting sections (41) of the four jump pieces (4) are coplanar.
5. The internal jumper type rectifier bridge stack with external terminals according to claim 1, characterized in that: The terminal (1) comprises a horizontal section (101) and an extension section (102) connected to both sides of the horizontal section (101); the value range of the angle α generated between the extension section (102) and the horizontal section (101) is 100-120°.
6. The internal jumper type rectifier bridge stack with external terminals according to claim 1, characterized in that: The first input terminal (11) is led out from a position of the first frame unit (5) close to the rectifier chip (3), the second input terminal (12) is led out from a position of the second frame unit (6) close to the pad, the first output terminal (13) is led out from a position of the third frame unit (7) close to the pad connected to the first frame unit (5), and the second output terminal (14) is led out from a position of the fourth frame unit (8) close to the rectifier chip (3) connected to the second frame unit (6).
7. The internal jump chip type rectifier bridge stack with external terminals according to claim 1, characterized in that: The first input terminal (11) and the first output terminal (13) are symmetrically arranged on both sides of the plastic-encapsulated housing (2), and the second input terminal (12) and the second output terminal (14) are symmetrically arranged on both sides of the plastic-encapsulated housing (2).
8. The internal jumper type rectifier bridge stack with external terminals according to claim 1, characterized in that: A boss (21) is provided on the upper surface of the plastic-encapsulated housing (2) on one side close to the first output terminal (13) and the second output terminal (14).
9. The internal jumper type rectifier bridge stack with external terminals according to claim 1, characterized in that: An anti-stretching hole (103) is provided at one end of the terminal (1) leading out of the frame unit, and a limiting column fixedly connected to the plastic-sealed housing (2) is provided in the anti-stretching hole (103).