CN208142169U - A kind of rectifier bridge component of the output end with TVS surge protection - Google Patents

Abstract

The utility model provides a rectifier bridge component with TVS surge protection at the output end, which belongs to the field of semiconductor components and includes four diode chips, a TVS chip, a first support, a second support, a third support, a fourth The bracket and jumper are characterized in that the P poles of the first diode chip and the second diode chip face upward and are arranged on the upper surface of the fourth bracket, and the upper surface of the first diode chip is connected with the first bracket. Connected, the upper surface of the second diode chip is connected with the second bracket; the N poles of the third diode chip and the fourth diode chip are facing upward and arranged on the upper surface of the third bracket, the third diode The upper surface of the chip is connected to the first bracket, and the upper surface of the fourth diode chip is connected to the second bracket; the TVS chip is arranged on the fourth bracket, and is connected to the welding position of the jumper through the jumper; the rectifier bridge is connected to the TVS The same body package can avoid the phenomenon of low product yield caused by the collapse of the welding wire.

Description

A rectifier bridge component with TVS surge protection at the output

technical field

The utility model relates to the field of semiconductor components, in particular to a rectifier bridge component with TVS surge protection at the output end.

Background technique

With the development of society, electronic products are becoming more and more sophisticated, and the requirements of electronic products for power supply are also getting higher and higher. When the existing AC power grid is struck by lightning and power equipment starts and stops, instantaneous interference will occur in the power grid, which will damage electronic equipment and circuits. Many electronic components that use direct current are used in electronic products, so it is necessary to add electronic components that convert AC to DC and have a rectification and voltage stabilization structure before connecting to the grid to protect these electronic components. Existing TVS diodes have extremely fast response times (nanoseconds) and relatively high surge absorption capabilities, which can protect subsequent circuit components from transient high-voltage spikes. Generally, TVS diodes are installed in the power input or output modules, and are responsible for protecting all components in the entire circuit. However, welding TVS tubes separately is not only costly, but also takes up a lot of space, which is not conducive to the miniaturization of electronic products.

In response to this problem, the utility model patent application number 201621042098.8 announced an ultra-thin rectifier bridge that filters out transient high-voltage pulses, including a plastic package, four diode chips with the same technical index, a bidirectional TVS tube chip, and four leads. frame; the two-way TVS tube chip is fixed on the first lead frame, and is connected to the third lead frame through wires; the two diode chips are fixed on the second lead frame, and the top surfaces are both P-type, respectively connected to the third lead frame through wires. 1. The third lead frame; the other two diode chips are fixed on the fourth lead frame, and the top surface is N-type, respectively connected to the first and third lead frames by wires; the first and third lead frames are used as AC leads pin, the second and fourth lead frames are used as positive and negative pins respectively. The structure adopts the form of four lead wires overlapping for welding wire layout, and the layout of the rectifier bridge is compact, which is conducive to the development of miniaturization of the PCB board.

Although the above structure solves the problem of large space occupied by the rectifier bridge welding TVS diodes, there are still the following problems: the welding wire process itself has limitations, the production efficiency is relatively low, and the production conditions are relatively harsh, and the leads used are in the plastic packaging process. It is easy to cause the collapse of the welding wire in the process, resulting in low product yield and affecting the quality of the product; the lead wire used is copper wire, and in order to meet the packaging requirements, the fineness of the copper wire used is extremely high, which will inevitably cause The product cost is increased, and the threading operation is cumbersome, and the threading speed is slow, which affects the production efficiency.

Contents of the invention

In order to solve the above problems, the utility model provides a rectifier bridge component with TVS surge protection at the output end with more stable structure, higher production efficiency and lower cost. The phenomenon of low product yield caused by line collapse.

The technical solution adopted by the utility model to solve the technical problem is: a rectifier bridge component with TVS surge protection at the output end, including a first diode chip, a second diode chip, a third diode chip, a fourth diode chip, a TVS chip, a first bracket, a second bracket, a third bracket, a fourth bracket, jumpers, solder paste, and a plastic package, wherein the first bracket, the second bracket , the third bracket, and the end of the fourth bracket are respectively provided with a first pin, a second pin, a third pin, and a fourth pin, and the first pin and the second pin are set as AC pole input ends , the third pin and the fourth pin are set as DC output terminals, and the technical indicators of the first diode chip, the second diode chip, the third diode chip, and the fourth diode chip are the same;

The lower surfaces of the first bracket and the second bracket are each provided with a bump, and the upper surface of the third bracket is provided with two bumps;

The P poles of the first diode chip and the second diode chip face upward, the first diode chip and the second diode chip are all arranged on the upper surface of the fourth bracket, and the first diode chip The upper surface of the diode chip is connected to the bumps on the first bracket, and the upper surface of the second diode chip is connected to the bumps on the second bracket;

The N poles of the third diode chip and the fourth diode chip face upward, and the third diode chip and the fourth diode chip are all arranged on the upper surface of the third support through bumps, and the third and second diode chips are arranged on the upper surface of the third bracket through bumps. The upper surface of the diode chip is connected to the first bracket, and the upper surface of the fourth diode chip is connected to the second bracket;

The fourth bracket is provided with a TVS base island close to the fourth pin, the end of the third bracket away from the third pin is provided with a jumper welding position, the TVS chip is arranged on the TVS base island, and the TVS chip A jumper is provided on the upper surface, one end of the jumper is connected to the TVS chip, and the other end of the jumper is connected to the welding position of the jumper.

Further, a protruding point is provided at one end of the first bracket close to the first pin.

Further, a protruding point is provided at one end of the second bracket close to the second pin.

Further, the first pin, the second pin, the third pin, and the fourth pin are set to be coplanar.

Further, the first pin, the second pin, the third pin, and the fourth pin are all made of copper.

Further, the bumps are set in one of conical, columnar, cuboid or V-shaped cross-sections.

The beneficial effect of the utility model is that the TVS is connected to the output end of the rectifier bridge by adopting a two-piece structure so that it is packaged together with the rectifier bridge, the overall layout is more reasonable, and it is more conducive to the miniaturization of products. Compared with the existing welding wire Process technology, relatively low requirements for production process conditions, relatively simple operation, high production efficiency, low production cost, and at the same time avoid the problem of product yield caused by the collapse of welding wire in the plastic sealing process, which is conducive to improving product quality; four The brackets are all made of copper with a larger cross-section. Compared with similar wire bonding processes, the internal resistance is lower, the power loss is smaller, and the heat dissipation performance is better.

Description of drawings

Fig. 1 is the internal chip circuit connection schematic diagram of the utility model;

Fig. 2 is the top view structural representation of the utility model;

Fig. 3 is a schematic diagram of the internal three-dimensional structure of the plastic package of the present invention;

Fig. 4 is a right view structural representation of the utility model;

Fig. 5 is a structural schematic diagram of four brackets of the present invention.

In the figure: 1. the first diode chip, 2. the second diode chip, 3. the third diode chip, 4. the fourth diode chip, 5. TVS chip, 6. the first bracket, 7. Second bracket, 8. Third bracket, 9. Fourth bracket, 10. Jumper, 11. First pin, 12. Second pin, 13. Third pin, 14. Fourth pin , 15. Plastic package, 16. Bump, 17.TVS base island, 18. Jump piece welding position.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figures 1-5, the utility model discloses a rectifier bridge component with TVS surge protection at the output end, including a first diode chip 1, a second diode chip 2, a third diode chip Tube chip 3, fourth diode chip 4, TVS chip 5, first bracket 6, second bracket 7, third bracket 8, fourth bracket 9, jumper 10, solder paste and plastic package 15, the plastic package The body 8 is set as epoxy resin colloid, and the TVS chip 5 can be any one of unidirectional TVS or bidirectional TVS;

The ends of the first bracket 6, the second bracket 7, the third bracket 8, and the fourth bracket 9 are respectively provided with a first pin 11, a second pin 12, a third pin 13, and a fourth pin 14, The first pin 11 and the second pin 12 are set as AC pole input ends, the third pin 13 and the fourth pin 14 are set as DC output ends, the first diode chip 1, the second two The pole tube chip 2, the third diode chip 3, and the fourth diode chip 4 have the same technical indicators; The bracket 8 and the fourth bracket 9 are arranged coplanarly and side by side at the lower part of the plastic package 15 .

The lower surfaces of the first bracket 6 and the second bracket 7 are all provided with a bump 16, and the first bracket 6 is provided with a bump 16 near the end of the first pin 11, and the second bracket 7 is near the second pin 11. One end of the pin 12 is provided with a bump 16, and the upper surface of the third support 8 is provided with two bumps 16;

The P poles of the first diode chip 1 and the second diode chip 2 face upward, the first diode chip 1 and the second diode chip 2 are both arranged on the upper surface of the fourth support 9, and The upper surface of a diode chip 1 is connected to the bump 16 on the first bracket 6, and the upper surface of the second diode chip 2 is connected to the bump 16 on the second bracket 7;

The N poles of the third diode chip 3 and the fourth diode chip 4 face upward, and the third diode chip 3 and the fourth diode chip 4 are all arranged on the third bracket 8 through bumps 16. On the upper surface, the upper surface of the third diode chip 3 is connected to the first bracket 6, and the upper surface of the fourth diode chip 4 is connected to the second bracket 7;

The fourth bracket 9 is provided with a TVS base island 17 close to the fourth pin 14, and the end of the third bracket 8 away from the third pin 13 is provided with a jumper welding position 18, and the TVS chip 5 is arranged on On the TVS base island 17 , a jumper 10 is arranged on the upper surface of the TVS chip 5 , one end of the jumper 10 is connected to the TVS chip 5 , and the other end of the jumper 10 is connected to the welding position 18 of the jumper.

In the utility model, solder paste welding is used to fix the chip and the support.

The first pins 11, the second pins 12, the third pins 13, and the fourth pins 14 described in the utility model are set to be coplanar, and the four pins are respectively connected to the brackets in a stepped structure. Four bending parts are formed, and the four pins are exposed outside the plastic package 15 to form a flat pin structure.

The first pin 11 , the second pin 12 , the third pin 13 and the fourth pin 14 described in the utility model are all made of copper.

The protruding points 16 described in this embodiment are set in a column shape, and the protruding points 16 may also be set in a conical shape, a rectangular parallelepiped, or a V-shaped cross section.

A two-piece structure is used to connect TVS to the output end of the rectifier bridge so that it is packaged with the rectifier bridge as a whole. The overall layout is more reasonable and more conducive to the miniaturization of products. Compared with the existing wire bonding technology, the production process requirements are relatively relatively Low, relatively simple operation, high production efficiency, low production cost, and at the same time avoid the problem of product yield caused by the collapse of welding wire in the plastic packaging process, which is conducive to improving product quality; the four brackets are all made of copper with large cross-section , Compared with similar wire bonding process, the internal resistance is lower, the power loss is smaller, and the heat dissipation performance is better.

Claims (6)

1. A rectifier bridge component with TVS surge protection at the output, including a first diode chip (1), a second diode chip (2), a third diode chip (3), a fourth diode chip Diode chip (4), TVS chip (5), first bracket (6), second bracket (7), third bracket (8), fourth bracket (9), jumper (10), solder paste And the plastic package (15), characterized in that the ends of the first bracket (6), the second bracket (7), the third bracket (8), and the fourth bracket (9) are respectively provided with first pins ( 11), the second pin (12), the third pin (13), the fourth pin (14), the first pin (11) and the second pin (12) are set as AC pole input terminals , the third pin (13) and the fourth pin (14) are set as DC output ends, the first diode chip (1), the second diode chip (2), the third diode chip (3) The technical indicators of the fourth diode chip (4) are the same; The lower surfaces of the first bracket (6) and the second bracket (7) are each provided with a convex point (16), and the upper surface of the third bracket (8) is provided with two convex points (16); The P poles of the first diode chip (1) and the second diode chip (2) face upward, and the first diode chip (1) and the second diode chip (2) are both arranged at the second The upper surface of the four brackets (9), the upper surface of the first diode chip (1) is connected with the bump (16) on the first bracket (6), and the upper surface of the second diode chip (2) is connected with the bump (16) on the first bracket (6). The bumps (16) on the second bracket (7) are connected; The N poles of the third diode chip (3) and the fourth diode chip (4) face upward, and the third diode chip (3) and the fourth diode chip (4) pass through bumps (16) is arranged on the upper surface of the third support (8), the upper surface of the third diode chip (3) is connected with the first support (6), and the upper surface of the fourth diode chip (4) is connected with the first support (6). Two brackets (7) are connected; The fourth bracket (9) is provided with a TVS base island (17) close to the fourth pin (14), and the end of the third bracket (8) far away from the third pin (13) is provided with jumper welding bit (18), the TVS chip (5) is set on the TVS base island (17), the upper surface of the TVS chip (5) is provided with a jumper (10), and one end of the jumper (10) is connected to the TVS chip (5) , the other end of the jumper (10) is connected to the welding position (18) of the jumper. 2. The rectifier bridge component with TVS surge protection at the output end according to claim 1, characterized in that, the end of the first bracket (6) close to the first pin (11) is provided with a bump (16 ). 3. The rectifier bridge component with TVS surge protection at the output end according to claim 1, characterized in that, the end of the second bracket (7) close to the second pin (12) is provided with a bump (16 ). 4. The rectifier bridge component with TVS surge protection at the output end according to claim 1, characterized in that, the first pin (11), the second pin (12), the third pin (13 ), the fourth pin (14) is set to be coplanar. 5. The rectifier bridge component with TVS surge protection at the output end according to claim 1, characterized in that the first pin (11), the second pin (12), the third pin (13 ), the fourth pin (14) are made of copper. 6. The rectifier bridge component with TVS surge protection at the output end according to any one of claims 1-5, characterized in that, the bumps (16) are set in a conical, columnar, cuboid or cross section It is one of the V shapes.