CN215529420U

CN215529420U - Double-output power module and circuit board thereof

Info

Publication number: CN215529420U
Application number: CN202121376378.3U
Authority: CN
Inventors: 不公告发明人
Original assignee: Mornsun Guangzhou Science and Technology Ltd
Current assignee: Mornsun Guangzhou Science and Technology Ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-01-14
Anticipated expiration: 2031-06-21

Abstract

The utility model provides a double-output power module and a circuit board thereof, wherein the power module has two outputs which are simultaneously established and can supply power for a rear-stage main power and control loop, pin terminals of the double-output are combined and processed, pin pads are arranged on the same pin terminal, and a groove is formed between the two pin pads from the outer end to the inner end, so that the volume of each output pin occupying the board can be reduced, the structural strength of the pins can be enhanced, the pins can be prevented from passing through a furnace and being connected with tin, and the output short circuit is not caused; meanwhile, the pin terminal of the switching power supply module adopts a golden finger and is integrated with the circuit board, and the original secondary side distance is shortened while the safety distance of a plurality of safety certification standards is met through the design of the transformer framework, so that the small size of a product is realized, and the automatic production can be realized.

Description

Double-output power module and circuit board thereof

Technical Field

The utility model relates to a switching power supply module structure, in particular to a double-output power supply module and a circuit board thereof.

Background

The power supply module is a power supply device which can be directly attached to a printed circuit board, is characterized by supplying power to a special integrated circuit, a processor, a memory and a digital or analog load, and is widely applied to occasions with strict requirements on volume, such as industrial control, electric instruments and meters, smart homes and the like.

The switch power supply module can be divided into two categories of AC/DC and DC/DC, the DC/DC converter is modularized, the design technology and the production process are mature and standardized at home and abroad, but the modularization of the AC/DC converter causes the problem of complex technology and process manufacturing in the modularization process due to the characteristics of the AC/DC converter. At present, the AC/DC power supply module on the market is difficult to consider both volume performance and price, and is difficult to realize full-automatic production in process.

In the existing double-output power supply, an output pin adopts a structure that one pin terminal bears one bonding pad, namely, the output end of a double-output product is provided with four terminals. Due to the limitation of the welding process, the distance between the output pin terminals is larger, so that the product volume is increased and the power density is low.

SUMMERY OF THE UTILITY MODEL

In view of the above, the main objective of the present invention is to provide an open-board dual-output miniaturized low-power AC/DC bare board power module, which has the advantages of reduced size of the power module, increased power integration density, optimized performance, improved process, and reduced cost, and has the advantages of dual-purpose AC/DC, wide input voltage range, high efficiency, high reliability, low power consumption, safe isolation, and two-way load carrying, and can be used with peripheral circuits according to the requirements, flexibly applied, and meeting the market requirements.

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

the utility model provides a circuit board, is applicable to dual output ACDC power module which characterized in that: the circuit board comprises a PCB and a golden finger protruding from the lower end of the PCB, and the golden finger is used as a pin terminal of the circuit board;

the pin terminals comprise two groups, one group is used as an input pin terminal, the other group is used as a dual-output pin terminal, the dual-output pin terminal comprises four pin bonding pads, the pin bonding pads are pairwise arranged on one pin terminal, and the distance between the two pin bonding pads in one pair is smaller than the distance between each pair of pin bonding pads.

Preferably, the distance between two of the pair of pin pads is less than 2.5 mm.

Preferably, the distance between two of the pair of pin pads is less than 1 mm.

Preferably, the distance between two of the pair of pin pads is 0.8 mm.

Preferably, a groove is formed between two paired pin bonding pads in the pin terminal with double-output from the outer end to the inner end.

Preferably, the groove formed between the two paired pin pads has a depth less than or equal to the length of the gold finger.

Preferably, the number of the pin pads of the dual-output is three, every two pin pads are arranged on one pin terminal in pairs, and a single pin pad is arranged on the other pin terminal; or three pin pads are all disposed on the same pin terminal.

A double-output power module is an open-board power module directly formed by any circuit board.

Preferably, when the product power of the dual-output power supply module is 10W, the total length of the pin terminal is less than 35 mm; when the product power of the double-output power supply module is 5W, the total length of the pin terminal is smaller than 31 mm.

Preferably, when the product power of the dual-output power supply module is 10W, the overall length of the pin terminal is 33.5 mm; when the product power of the double-output power supply module is 5W, the total length of the pin terminal is 29.54 mm.

Due to the application of the technical scheme, the utility model has the beneficial effects that:

(1) by adopting the golden finger scheme, the pin terminals and the circuit board are integrated, a bonding pad of the pin terminals is not required to be added, the positions of the pin terminals can be adjusted at will, the safety requirements are met, the module volume is greatly reduced, the process is simplified, and the cost is reduced;

(2) the pin terminals of the two-way output are combined, the pin bonding pads are arranged on the same pin terminal, and a groove is formed between the two pin bonding pads from the outer end to the inner end, so that the area of each output pin in a plate body is reduced by 25%, and the output is expanded to N paths of output, namely N × 25%, the structural strength of the pin can be enhanced, the pin is prevented from passing through a furnace and being connected with tin, and meanwhile, the output short circuit is not caused;

(3) by using the utility model, the power module is manufactured by a double-sided pasting plate process, and the transformer does not need to wrap the magnetic core by additional adhesive tape, so that automatic production can be realized, and the manufacturing cost is greatly reduced.

Drawings

FIG. 1 is a perspective view of a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a circuit board according to a first embodiment of the present invention;

fig. 3 is a perspective view of a second embodiment of the present invention.

Detailed Description

First embodiment

Fig. 1 is a product structure diagram of a first embodiment of the utility model, and a dual output power module includes a circuit board 10, and electronic components 20 and a transformer 30 are disposed on the circuit board 10 to implement a complete electrical function.

The circuit board 10 uses a special board, the creepage distance between the primary pad and the secondary pad on the bottom surface is 5.2mm, and the creepage distance between the primary pad and the secondary pad on the top surface is 8.2 mm. The upper surface of the secondary side base of the transformer 30 is provided with a boss 31 and a baffle 32, and the baffle 32 of the transformer is parallel to one side of the pin plate frame and is 0.6mm away from the pin plate frame.

As shown in fig. 2, the circuit board 10 includes a PCB 11 and a gold finger 12 protruding from a lower end of the PCB, the gold finger 12 is used as a pin terminal of the circuit board, the number of the pin terminals is six, four pins on the left are input pin terminals, two pins on the right are output pin terminals, wherein the pin terminal 1 and the pin terminal 2 are used for inputting a power supply, the pin terminal 3 and the pin terminal 4 are used for externally connecting a filter electrolytic capacitor, the pin terminal 5 is a main output, and the pin terminal 6 is an auxiliary output and is used for supplying power to two loads.

Be equipped with two pin pads 120 on pin terminal 5 and the pin terminal 6 (not shown in fig. 1, 3), it is positive respectively to export, export is negative, the interval between two pin pads in pin terminal 5 and the pin terminal 6 sets up to 0.8mm, and set up recess 121 from the outer end to the inner between two pin pads, the setting of recess 121 can strengthen pin terminal's structural strength and can not arouse the short circuit, can also prevent that the pin from crossing stove even tin, the groove depth is less than or equal to golden finger length, the groove 121 groove depth sets up to 1mm in this embodiment.

The product power of the dual-output power module is 10W, the distance between the positive output and the negative output of each path of pin terminals of the dual-output is reduced to 0.8mm from 2.54mm through the combination processing of the output pin terminals, and the total length of the product pin terminals is reduced to 33.5mm from 36.98mm, so that the whole volume of the power module is reduced by 10%. The overall length of the pin terminals is the distance between the leftmost pin terminal 1 and the rightmost pin terminal 6.

At present when the volume of power electronic products increasingly pursues high power density, miniaturization, this embodiment makes the whole volume of dual output power module reduce 10%, has solved golden finger scheme easily fracture or the pad problem that drops simultaneously, satisfies authentication safety and regulation requirement, and manufacturing process is simplified, material and manufacturing cost descend.

Second embodiment

Fig. 3 is a product structure diagram of a second embodiment of the utility model, and a dual output power module includes a circuit board 10, and electronic components 20 and a transformer 30 are disposed on the circuit board 10 to implement a complete electrical function.

The circuit board 10 uses a special board, the creepage distance between the primary pad and the secondary pad on the bottom surface is 5mm, and the creepage distance between the primary pad and the secondary pad on the top surface is 7.8 mm. The upper surface of the secondary side base of the transformer 30 is provided with a baffle 32 and a retaining wall 33, and the baffle 32 of the transformer is parallel to one side of the pin plate frame and is 0.3mm away from the plate frame.

The present embodiment differs from the first embodiment in that: the product power of this embodiment dual output power module is 5W, through handling the output pin terminal combination, the distance between every positive and negative output of the pin terminal of dual output reduces to 0.8mm by 2.54mm, the overall length of product pin terminal reduces to 29.54mm by 33.02mm before, thereby make power module's whole volume reduce 10%, the easy fracture of golden finger scheme or pad problem that drops has been solved simultaneously, satisfy authentication ann rule requirement, and manufacturing process simplifies, material and manufacturing cost descend.

The above are merely preferred embodiments of the present invention, and those skilled in the art to which the present invention pertains may make variations and modifications of the above-described embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The utility model provides a circuit board, is applicable to dual output ACDC power module which characterized in that: the circuit board comprises a PCB and a golden finger protruding from the lower end of the PCB, and the golden finger is used as a pin terminal of the circuit board;

2. The circuit board of claim 1, wherein: the distance between two pin bonding pads in the pair of pin bonding pads is less than 2.5 mm.

3. The circuit board of claim 1, wherein: the distance between two pin bonding pads in the pair of pin bonding pads is less than 1 mm.

4. The circuit board of claim 1, wherein: the distance between two pin bonding pads in the pair of pin bonding pads is 0.8 mm.

5. The circuit board of claim 1, wherein: grooves are formed between two paired pin bonding pads in the pin terminals of the two-way output from the outer end to the inner end.

6. The circuit board of claim 5, wherein: and the groove depth of the groove formed between the two paired pin bonding pads is less than or equal to the length of the golden finger.

7. The circuit board of claim 1, wherein: the number of the pin bonding pads of the double-path output is three, every two pin bonding pads are arranged on one pin terminal in pairs, and a single pin bonding pad is arranged on the other pin terminal; or three pin pads are all disposed on the same pin terminal.

8. A kind of double-output power module, characterized by: is an open-plate power module directly constituted by the circuit board of any one of claims 1 to 7.

9. The dual output power module of claim 8, wherein: when the product power of the double-output power supply module is 10W, the total length of the pin terminal is less than 35 mm; when the product power of the double-output power supply module is 5W, the total length of the pin terminal is smaller than 31 mm.

10. The dual output power module of claim 8, wherein: when the product power of the double-output power supply module is 10W, the total length of the pin terminal is 33.5 mm; when the product power of the double-output power supply module is 5W, the total length of the pin terminal is 29.54 mm.