CN110994223B

CN110994223B - Burn-in test socket for switching power supply circuit

Info

Publication number: CN110994223B
Application number: CN201911108079.9A
Authority: CN
Inventors: 邓小健; 张立; 吴志军; 胡会献; 王茉; 莫艳图
Original assignee: Beijing Microelectronic Technology Institute; Mxtronics Corp
Current assignee: Beijing Microelectronic Technology Institute; Mxtronics Corp
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2021-08-13
Anticipated expiration: 2039-11-13
Also published as: CN110994223A

Abstract

The invention relates to a burn-in test socket for a switching power supply circuit, belonging to the technical field of improvement of a burn-in test socket structure; the socket comprises a socket lower cover, a socket upper cover, a PCB unit and a circuit module; wherein, the lower cover of the socket is a horizontally placed plate-shaped structure; the PCB unit is of a plate-shaped structure; the PCB unit is fixedly arranged on the upper surface of the lower cover of the socket; the circuit module is placed on the upper surface of the PCB unit; the upper cover of the socket is placed on the upper surface of the PCB unit; the upper cover of the socket clamps the lower cover of the socket; compressing the circuit module to realize the circuit communication between the circuit module and the PCB unit; the invention solves the problem that the output waveform of the switching power supply circuit in the FP packaging form is interfered and influenced when the traditional burn-in test socket is used.

Description

Burn-in test socket for switching power supply circuit

Technical Field

The invention belongs to the technical field of structure improvement of burn-in test sockets and relates to a burn-in test socket for a switching power supply circuit.

Background

In recent years, the integrated circuit industry in China is rapidly developed, and more types of circuits are developed. Among them, a switching power supply circuit refers to a circuit design of a power supply part for supplying power to a power consumption device. The switch power supply circuit can stably output by matching with the inductor, has strict requirements on parasitic parameters between the circuit lead leg and the peripheral inductor, and requires that the peripheral inductor is as close to the circuit lead leg as possible. In order to ensure the product quality, the switch power supply circuit needs to be subjected to aging test examination. When the existing aging test socket in the FP packaging form is used, the circuit lead leg of the socket is firstly contacted with the socket probe, and then the socket probe is contacted with the bonding pad on the PCB, so that a certain distance exists between the inductor near the bonding pad on the PCB and the circuit lead leg, and a large parasitic inductor and a large capacitor are introduced, so that the output waveform of the circuit is interfered and influenced, the required output waveform cannot be achieved, and the switching power supply circuit cannot normally work.

Disclosure of Invention

The technical problem solved by the invention is as follows: the defects in the prior art are overcome, the burn-in test socket for the switching power supply circuit is provided, and the problem that when the switching power supply circuit in the FP packaging mode uses the traditional burn-in test socket, the output waveform of the circuit is interfered and influenced is solved.

The technical scheme of the invention is as follows:

a burn-in test socket for a switching power supply circuit comprises a socket lower cover, a socket upper cover, a PCB unit and a circuit module; wherein, the lower cover of the socket is a horizontally placed plate-shaped structure; the PCB unit is of a plate-shaped structure; the PCB unit is fixedly arranged on the upper surface of the lower cover of the socket; the circuit module is placed on the upper surface of the PCB unit; the upper cover of the socket is placed on the upper surface of the PCB unit; the upper cover of the socket clamps the lower cover of the socket; and compressing the circuit module to realize the circuit communication between the circuit module and the PCB unit.

In the aging test socket for the switching power supply circuit, the upper surface of the lower socket cover is provided with a square groove; the square groove is arranged in the middle of the lower socket cover and corresponds to the PCB unit; the heat dissipation of the top PCB unit is realized; four corners of the upper surface of the lower socket cover are respectively provided with 1 screw hole; the PCB unit is fixedly connected with the lower cover of the socket; the bottom ends of the opposite side walls of the socket lower cover 2 are respectively provided with 1 inclined plane groove; 2 inclined plane grooves are symmetrically arranged; and the section of the inclined plane groove is of a trapezoidal structure.

In the burn-in test socket for the switching power supply circuit, the PCB unit comprises a PCB unit main body and 2 rows of contact blocks; the PCB unit main body is of a rectangular plate-shaped structure; a rectangular through hole is formed in the middle of the PCB unit main body; the circuit module is placed through the rectangular through hole; the 2 rows of contact blocks are symmetrically distributed on two sides of the rectangular through hole; and after the contact block is contacted with the circuit module, the circuit module is communicated with the electric connection relationship inside the PCB unit main body.

In the burn-in test socket for the switching power supply circuit, the circuit module comprises a circuit main body and 2 rows of pins; wherein, the circuit main body is a plate-shaped structure; the 2 rows of pins are symmetrically arranged on the side walls of the two ends of the circuit main body; when the circuit module is placed on the upper surface of the PCB unit, the circuit main body is embedded into the rectangular through hole; the pins correspond to the contact blocks one by one; and 2 rows of pins of the circuit module are lapped on the upper surface of the 2 rows of contact blocks.

In the aging test socket for the switching power supply circuit, the socket upper cover comprises 2 fastening pieces, a socket upper cover base body and a sawtooth pressing block; wherein, the socket upper cover seat body is of a cuboid structure; the 2 fastening pieces are symmetrically arranged on two side walls of the socket upper cover seat body; the sawtooth pressing block is arranged at the center of the bottom of the socket upper cover seat body.

In the aging test socket for the switching power supply circuit, the fastening piece rotates around the socket upper cover seat body; and the bottom end of the fastening piece is provided with a barb; the barb position corresponds to the inclined plane groove; when the upper cover of the socket covers the upper surface of the PCB unit; the fastening piece rotates downwards; the barb extends into the inclined plane groove, and the PCB unit is compressed by the upper socket cover and fixedly connected with the upper socket cover and the lower socket cover.

In the aging test socket for the switching power supply circuit, the socket upper cover seat body comprises 2 rotating shafts, 2 spring connecting columns and an upper cover seat body main body; wherein, the main body of the upper cover seat body is of a cuboid structure; the 2 rotating shafts are symmetrically arranged at 2 side walls of the upper cover seat body main body; each rotating shaft is respectively matched with 1 fastening piece in a rotating way; the fastening piece rotates by taking the rotating shaft as the shaft; a rectangular groove is formed in the center of the bottom of the upper cover seat body main body; the 2 spring connecting columns are symmetrically arranged at the bottom of the rectangular groove.

In the aging test socket for the switching power supply circuit, the sawtooth pressing block comprises 2 rows of sawteeth, a sawtooth pressing block main body and 2 sawtooth pressing block springs; wherein the main body of the sawtooth pressing block is of a cuboid structure; 2 rows of saw teeth are symmetrically arranged at the bottom of the saw tooth pressing block main body; and the 2 rows of saw teeth correspond to the 2 rows of pins in position; the 2 sawtooth pressing block springs are symmetrically arranged at the top end of the sawtooth pressing block main body; the sawtooth pressing block main body extends into the rectangular groove; the top end of each sawtooth pressing block spring is respectively butted with 1 spring connecting column.

In the aging test socket for the switching power supply circuit, when the upper cover of the socket is covered on the PCB unit, 2 sawtooth pressing block springs are in a compressed state; under the action of the reset force of the sawtooth pressing block spring, 2 rows of sawteeth press 2 rows of pins on the upper surface of the 2 rows of contact blocks; the pins are in close contact with the contact blocks, so that the circuit module is communicated with the electric connection relationship inside the PCB unit main body.

In the aging test socket for the switching power supply circuit, the sawtooth pressing block main body realizes displacement adjustment in the vertical direction under the elastic force action of the sawtooth pressing block spring; the displacement distance is 0.2-0.5 mm.

Compared with the prior art, the invention has the beneficial effects that:

(1) according to the invention, as the circuit is arranged on the PCB unit, the circuit lead leg is directly contacted with the bonding pad on the PCB, the inductor is arranged near the bonding pad of the PCB, the peripheral inductor is close to the circuit lead leg to the maximum extent, the introduction of an intermediate connector ring joint is avoided, and the output waveform of the circuit is not influenced by interference;

(2) the double-fastening piece is designed on the upper socket cover, when the upper socket cover and the lower socket cover are aligned up and down, the upper socket cover and the lower socket cover are fastened through the double-fastening piece, so that the same pressure of pressing down the circuit leading legs by the sawtooth pressing blocks of the upper socket cover is ensured, the circuit leading legs are uniformly stressed, and the condition that the plating layers of the circuit leading legs are damaged due to non-uniform stress of the upper socket cover is avoided;

(3) the socket lower cover seat body is provided with the sawtooth pressing block which is used for fixing and separating the circuit leading legs, so that the circuit leading legs are in close contact with the contact block on the PCB, and the short circuit condition caused by the short circuit of the adjacent leading legs of the circuit is avoided;

(4) the upper cover of the socket is provided with the elastic sawtooth pressing block, the movable amount of the sawtooth pressing block on the vertical surface in the concave groove in the middle of the upper cover seat body of the socket is 0.2-0.5mm, and the lead legs on two sides of a circuit are stressed when the socket is closed, but the lead leg plating layer of the circuit cannot be damaged by overvoltage.

Drawings

FIG. 1 is a schematic overall view of a test socket according to the present invention;

FIG. 2 is a schematic view of a lower cover of the socket of the present invention;

FIG. 3 is a schematic diagram of a PCB unit of the present invention;

FIG. 4 is a schematic diagram of a circuit module according to the present invention;

FIG. 5 is a schematic view of the upper cover of the socket of the present invention;

FIG. 6 is a schematic view of a fastener of the present invention;

FIG. 7 is a schematic view of the socket cover seat of the present invention;

FIG. 8 is a schematic view of a toothed press block of the present invention.

Detailed Description

The invention is further illustrated by the following examples.

The invention provides a burn-in test socket for a switching power supply circuit, which solves the problem that when the switching power supply circuit in an FP packaging mode uses a traditional burn-in test socket, the output waveform of the circuit is interfered and influenced.

As shown in fig. 1, the burn-in test socket mainly comprises a socket lower cover 1, a socket upper cover 2, a PCB unit 3 and a circuit module 4; wherein, the socket lower cover 1 is a horizontally placed plate-shaped structure; the PCB unit 3 is of a plate-shaped structure; the PCB unit 3 is fixedly arranged on the upper surface of the socket lower cover 1; the circuit module 4 is placed on the upper surface of the PCB unit 3; the socket upper cover 2 is placed on the upper surface of the PCB unit 3; the upper socket cover 2 clamps the lower socket cover 1; and compressing the circuit module 4 to realize the circuit communication between the circuit module 4 and the PCB unit 3.

The structure form of the lower socket cover 1 is shown in fig. 2, and a square groove 11 is formed in the upper surface of the lower socket cover 1; the square groove 11 is arranged in the middle of the socket lower cover 1 and corresponds to the PCB unit 3; the heat dissipation device is used for avoiding components and heat dissipation below the PCB unit 3; four corners of the upper surface of the socket lower cover 1 are respectively provided with 1 screw hole 12; the PCB unit 3 is fixedly connected with the socket lower cover 1; the bottom ends of the opposite side walls of the socket lower cover 12 are respectively provided with 1 inclined plane groove 13; 2 inclined plane grooves 13 are symmetrically arranged; and the section of the inclined plane groove 13 is in a trapezoidal structure.

As shown in fig. 3, the PCB unit 3 includes a

PCB unit body

34 and 2 rows of contact pads 32; the PCB unit body 34 has a rectangular plate-shaped structure; and the middle part of the PCB unit main body 34 is provided with a rectangular through hole 31; the placement of the circuit module 4 is realized through the rectangular through hole 31; the 2 rows of contact blocks 32 are symmetrically distributed on two sides of the rectangular through hole 31; the contact pads 32 are brought into contact with the circuit module 4 to communicate the electrical connection between the circuit module 4 and the inside of the PCB unit body 34. The contact blocks 32 are zigzag, and two rows are arranged in parallel at two sides of the rectangular through hole 31 and correspond to the pins 42 at two ends of the circuit module 4 one by one. The PCB unit body 34 has completed the relevant electrical connection inside, and the components are soldered to the back of the PCB unit body 34.

As shown in fig. 4, the circuit module 4 includes a

circuit body

41 and 2 rows of pins 42; wherein, the circuit main body 41 is a plate-shaped structure; the 2 rows of pins 42 are symmetrically arranged on the side walls of two ends of the circuit body 41; when the circuit module 4 is placed on the upper surface of the PCB unit 3, the circuit main body 41 is embedded in the rectangular through hole 31; and the pins 42 correspond to the contact blocks 32 one to one; the 2 rows of pins 42 of circuit module 4 overlap the upper surfaces of the 2 rows of contact blocks 32.

As shown in fig. 5, the socket upper cover 2 includes 2 fastening members 21, a socket upper cover seat body 22, and a saw-tooth pressing piece 23; wherein, the socket upper cover seat body 22 is a cuboid structure; the 2 fastening pieces 21 are symmetrically arranged at two side walls of the socket upper cover seat body 22; the sawtooth pressing block 23 is arranged at the center of the bottom of the socket upper cover seat body 22. As shown in fig. 6, the fastening member 21 is rotated around the socket upper cover body 22; and the bottom end of the fastening piece 21 is provided with a barb 211; the barb 211 corresponds to the inclined groove 13 in position; when the socket upper cover 2 covers the upper surface of the PCB unit 3; the clasp 21 is rotated downward; the barb 211 extends into the inclined plane groove 13, so that the PCB unit 3 is pressed by the socket upper cover 2 and the socket upper cover 2 is fixedly connected with the socket lower cover 1. As shown in fig. 7, the socket upper cover housing 22 includes 2

rotation shafts

221, 2 spring connection posts 223, and an upper cover housing main body 224; wherein, the upper cover seat body 224 is a cuboid structure; the 2 rotation shafts 221 are symmetrically arranged at the 2 side walls of the upper cover seat body 224; each rotating shaft 221 is respectively matched with 1 fastening piece 21 in a rotating way; the fastening piece 21 is rotated by taking the rotating shaft 221 as an axis; a rectangular groove 222 is formed in the center of the bottom of the upper cover seat body 224; the 2 spring connecting columns 223 are symmetrically arranged at the bottom of the rectangular groove 222; as shown in fig. 8, the saw tooth pressing piece 23 includes 2 rows of saw teeth 231, a saw tooth pressing piece

main body

232, and 2 saw tooth pressing piece springs 233; wherein, the sawtooth pressing block main body 232 is a cuboid structure; the 2 rows of saw teeth 231 are symmetrically arranged at the bottom of the saw tooth pressing block main body 232; and 2 rows of saw teeth 231 correspond to 2 rows of pins 42 in position; the 2 sawtooth press block springs 233 are symmetrically arranged at the top end of the sawtooth press block main body 232; the sawtooth press block main body 232 extends into the rectangular groove 222; the top end of each sawtooth pressing block spring 233 is respectively butted with 1 spring connecting column 223. The sawtooth pressing block main body 232 realizes displacement adjustment in the vertical direction under the elastic force action of the sawtooth pressing block spring 233; the displacement distance is 0.2-0.5 mm; and ensures that when the socket is closed, the pins 42 on both sides of the circuit are stressed, but the plating of the pins 42 cannot be damaged by overvoltage.

The invention designs 2 fastening pieces 21; when the socket lower cover 1 and the socket upper cover 2 are aligned up and down, the socket upper cover 2 and the socket lower cover 1 are fastened together by the double fastening pieces 21, the pressure that the pins 42 are pressed down by the sawtooth pressing blocks 23 of the socket upper cover 2 is ensured to be the same, the stress of the pins 42 is uniform, and the occurrence of the condition that the plating layers of the pins 42 are damaged due to the uneven stress of the socket upper cover 2 is avoided.

When the socket upper cover 2 is covered on the PCB unit 3, the 2 saw tooth pressing block springs 233 are in a compressed state; under the reset acting force of the sawtooth pressing block spring 233, the 2 rows of sawteeth 231 press the 2 rows of pins 42 on the upper surface of the 2 rows of contact blocks 32; the pins 42 are in intimate contact with the contact blocks 32 to effect electrical communication between the circuit module 4 and the interior of the PCB unit body 34.

The operation process of the invention is as follows:

the PCB unit 3 is placed on the socket lower cover 1 and fixed by the screw holes 12. And then the circuit module 4 is placed on the rectangular through hole 31, the circuit module 4 is moved up and down and left and right, and the circuit module 4 is adjusted, so that the pins 42 of the circuit module 4 correspond to the contact blocks 32 one by one. And finally, the socket upper cover 2 is taken up, the fastening pieces 21 at the two ends of the socket upper cover 2 are pressed down by the double fingers, the fastening pieces 21 are opened for a certain angle, the socket lower cover 1 and the socket upper cover 2 are adjusted, when the saw teeth 231 correspond to the guide legs 42 of the circuit module 4 one by one, the socket lower cover 1 is moved down until the barbs 211 reach the inclined plane grooves 13, the double fingers pressing the fastening pieces 21 at the two ends of the socket upper cover 2 are released, and the socket is closed.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.

Claims

1. The utility model provides a burn-in test socket for switching power supply class circuit which characterized in that: the socket comprises a socket lower cover (1), a socket upper cover (2), a PCB unit (3) and a circuit module (4); wherein, the socket lower cover (1) is a horizontally placed plate-shaped structure; the PCB unit (3) is of a plate-shaped structure; the PCB unit (3) is fixedly arranged on the upper surface of the socket lower cover (1); the circuit module (4) is placed on the upper surface of the PCB unit (3); the socket upper cover (2) is placed on the upper surface of the PCB unit (3); the upper socket cover (2) clamps the lower socket cover (1); the circuit module (4) is compressed, and the circuit communication between the circuit module (4) and the PCB unit (3) is realized;

the upper surface of the socket lower cover (1) is provided with a square groove (11); the square groove (11) is arranged in the middle of the socket lower cover (1) and corresponds to the PCB unit (3); the heat dissipation of the top PCB unit (3) is realized; four corners of the upper surface of the socket lower cover (1) are respectively provided with 1 screw hole (12); the fixed connection between the PCB unit (3) and the socket lower cover (1) is realized; the bottom ends of the opposite side walls of the socket lower cover (1)2 are respectively provided with 1 inclined plane groove (13); 2 inclined plane grooves (13) are symmetrically arranged; the section of the inclined plane groove (13) is of a trapezoidal structure;

the PCB unit (3) comprises a PCB unit main body (34) and 2 rows of contact blocks (32); the PCB unit main body (34) is of a rectangular plate-shaped structure; a rectangular through hole (31) is formed in the middle of the PCB unit main body (34); the circuit module (4) is placed through the rectangular through hole (31); the 2 rows of contact blocks (32) are symmetrically distributed on two sides of the rectangular through hole (31); after the contact block (32) is contacted with the circuit module (4), the circuit module (4) is communicated with the electrical connection relationship inside the PCB unit main body (34).

2. A burn-in test socket for a switching power supply type circuit according to claim 1, wherein: the circuit module (4) comprises a circuit body (41) and 2 rows of pins (42); wherein, the circuit main body (41) is a plate-shaped structure; the 2 rows of pins (42) are symmetrically arranged on the side walls of two ends of the circuit main body (41); when the circuit module (4) is placed on the upper surface of the PCB unit (3), the circuit main body (41) is embedded into the rectangular through hole (31); the pins (42) correspond to the contact blocks (32) one by one; and 2 rows of pins (42) of the circuit module (4) are lapped on the upper surface of the 2 rows of contact blocks (32).

3. A burn-in test socket for a switching power supply type circuit according to claim 2, wherein: the socket upper cover (2) comprises 2 fastening pieces (21), a socket upper cover seat body (22) and a sawtooth pressing block (23); wherein, the socket upper cover seat body (22) is of a cuboid structure; the 2 fastening pieces (21) are symmetrically arranged on two side walls of the socket upper cover seat body (22); the sawtooth pressing block (23) is arranged at the center of the bottom of the socket upper cover seat body (22).

4. A burn-in test socket for switching power supply type circuits according to claim 3, wherein: the fastening piece (21) rotates around the socket upper cover seat body (22); the bottom end of the fastening piece (21) is provided with a barb (211); the barb (211) corresponds to the inclined plane groove (13); when the upper socket cover (2) covers the upper surface of the PCB unit (3); the fastening piece (21) rotates downwards; the barb (211) extends into the inclined plane groove (13) to realize the compression of the upper socket cover (2) on the PCB unit (3) and the fixed connection of the upper socket cover (2) and the lower socket cover (1).

5. The burn-in test socket for switching power supply type circuits according to claim 4, wherein: the socket upper cover seat body (22) comprises 2 rotating shafts (221), 2 spring connecting columns (223) and an upper cover seat body (224); wherein, the upper cover seat body main body (224) is of a cuboid structure; the 2 rotating shafts (221) are symmetrically arranged at 2 side walls of the upper cover seat body main body (224); each rotating shaft (221) is respectively matched with 1 fastening piece (21) in a rotating way; the fastening piece (21) rotates around the rotating shaft (221); a rectangular groove (222) is formed in the center of the bottom of the upper cover seat body (224); the 2 spring connecting columns (223) are symmetrically arranged at the bottom of the rectangular groove (222).

6. A burn-in test socket for switching power supply type circuits according to claim 5, wherein: the sawtooth pressing block (23) comprises 2 rows of sawteeth (231), a sawtooth pressing block main body (232) and 2 sawtooth pressing block springs (233); wherein the sawtooth pressing block main body (232) is of a cuboid structure; the 2 rows of sawteeth (231) are symmetrically arranged at the bottom of the sawteeth pressing block main body (232); and the 2 rows of saw teeth (231) correspond to the 2 rows of pins (42); the 2 sawtooth pressing block springs (233) are symmetrically arranged at the top end of the sawtooth pressing block main body (232); the sawtooth pressing block main body (232) extends into the rectangular groove (222); the top end of each sawtooth pressing block spring (233) is respectively butted with 1 spring connecting column (223).

7. The burn-in test socket for switching power supply type circuits according to claim 6, wherein: when the socket upper cover (2) covers the PCB unit (3), the 2 sawtooth pressing block springs (233) are in a compressed state; under the reset acting force of the sawtooth pressing block spring (233), 2 rows of sawteeth (231) press 2 rows of pins (42) on the upper surface of the 2 rows of contact blocks (32); the pins (42) are in close contact with the contact blocks (32) to realize the communication of the circuit module (4) and the electrical connection relationship inside the PCB unit main body (34).

8. The burn-in test socket for switching power supply type circuits of claim 7, wherein: the sawtooth pressing block main body (232) realizes displacement adjustment in the vertical direction under the elastic force action of the sawtooth pressing block spring (233); the displacement distance is 0.2-0.5 mm.