CN109361250B

CN109361250B - Charging power supply

Info

Publication number: CN109361250B
Application number: CN201811419734.8A
Authority: CN
Inventors: 杜庆华; 葛颖
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-11-26
Filing date: 2018-11-26
Publication date: 2022-01-11
Anticipated expiration: 2038-11-26
Also published as: CN109361250A

Abstract

The embodiment of the invention discloses a charging power supply, wherein the charging power supply comprises: a connector and a printed circuit board; the printed circuit board comprises at least one pin jack and the connector comprises at least one pin inserted in the pin jack; the pin jack is connected with the capacitor through the wiring and then grounded. The charging power supply provided by the embodiment of the invention can shorten the ESD path length, reduce the path impedance and effectively improve the ESD resistance of the charging power supply.

Description

Charging power supply

Technical Field

The embodiment of the invention relates to the technical field of equipment charging, in particular to a charging power supply.

Background

Along with the increasing use frequency of the mobile terminal by people, the protection requirement of the user on the static charging during traveling is also increased. In order to solve the problem of Electro-Static discharge (ESD) in the industry, one Pin of the USB iron case is grounded to a capacitor. The specific structure is shown in a cross-sectional view of a USB iron shell in fig. 1, wherein Pin2 of 4 fixed pins of the USB iron shell is a grounding Pin, 101 is a grounding capacitor of Pin2 to ground, and other fixed pins are not grounded; the width of the USB iron shell is marked as b, the length of the USB iron shell is marked as a, and the length of the USB Pin Pin is marked as L; because of the uncertainty of the ESD path, the ESD path is roughly divided into five paths; 1. when ESD is introduced into the USB iron shell Pin1 direction for travel charging, the path length from the ESD to the ground is about b + 3L;

2. when ESD is introduced into the USB iron shell Pin2 for charging, the ESD directly passes through Pin2 and C6 to the ground, and the path length is about L;

3. when ESD is introduced into the USB iron shell Pin3 direction for travel charging, the path length is about a + 3L;

4. when ESD is introduced into the USB iron shell Pin4 direction for travel charging, the path length is about a + b + 3L;

5. when the ESD is introduced into the charger from the direction of other places (except the Pin foot) of the USB iron shell, the length of the ESD path is between L and a + b + 3L.

In conclusion, the ESD path length of the structure is between L and a + b +3L, the ESD path is longer, the path resistance is large, and the charging anti-ESD capacity is poor.

Disclosure of Invention

The embodiment of the invention provides a charging power supply, which aims to solve the problems of longer charging ESD path, large path impedance and poor charging ESD resistance in the prior art.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a charging power supply, where the charging power supply includes: a connector and a PCB (Printed Circuit Board); the printed circuit board comprises at least one pin jack and the connector comprises at least one pin inserted in the pin jack; the pin jack is connected with the capacitor through the wiring and then grounded.

In the embodiment of the invention, the pins of the connector of the charging power supply are respectively inserted into the pin jacks of the PCB, and the pin jacks on the PCB are grounded after being connected with the capacitor through the routing, so that the ESD path length can be effectively shortened, the path impedance is reduced, and the ESD resistance of the charging power supply is effectively improved.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

Various advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic cross-sectional view of a conventional USB iron case;

fig. 2 is a schematic structural diagram of a PCB according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a PCB according to a second embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1, a schematic structural diagram of a PCB according to a first embodiment of the present invention is shown.

The charging power supply of the embodiment of the invention comprises: a connector and a PCB; the PCB comprises at least one pin jack and the connector comprises at least one pin embedded in the pin jack; the pin jack is grounded after being connected with the capacitor through the wiring. The number of pins included in the connector is different according to different models, and N can be 3, 4 or 5. In the embodiment of the invention, the connector is used as a USB iron shell, the USB iron shell comprises 4 pins, and the PCB comprises 4 pin jacks.

The four pins of the USB iron shell are respectively: a first pin1, a second pin2, a third pin3, and a fourth pin 4. The first pin, the second pin, the third pin and the fourth pin are sequentially arranged and enclosed to form a rectangular shape. The PCB includes 4 pin jacks for: a first pin receptacle, a second pin receptacle, a third pin receptacle, and a fourth pin receptacle.

As shown in fig. 2, the first pin1 is inserted into the first pin insertion hole, the second pin2 is inserted into the second pin insertion hole, the third pin3 is inserted into the third pin insertion hole, and the fourth pin4 is inserted into the fourth pin insertion hole. The pin receptacles are not shown in fig. 2 because the four pins are each inserted into a pin receptacle of the PCB.

The first pin jack is connected with a first capacitor, namely C61, through a wire and then grounded;

the second pin jack is connected with a second capacitor, namely C62, through a wire and then is grounded;

the third pin jack is connected with a third capacitor, namely C63, through a wire and then grounded;

the fourth pin jack is connected with a fourth capacitor, namely C64, through a trace and then grounded.

After the four pin jacks are respectively connected with the capacitors through the wires, the four pins are embedded in the pin jacks, and correspondingly, the four pins are also connected with the corresponding capacitors through the bottom wires of the PCB and then grounded. Preferably, the trace is a copper foil trace, and the first capacitor, the second capacitor, the third capacitor and the fourth capacitor are SMD (Surface Mounted Devices) capacitors.

In the charging power supply with the above structure, the ESD paths can be roughly classified into the following two types:

when ESD comes from four pin directions, the ESD path length in each direction is about L, since each pin is grounded through a capacitor, where L is the pin length.

When ESD does not come from the direction of four pins, the ESD path length is certainly about a/2+ L at most, wherein L is the pin length, and a is the distance from the first pin to the fourth pin, namely the length of the USB iron shell.

According to the charging power supply provided by the embodiment of the invention, the 4 pins of the connector of the charging power supply are respectively inserted into the 4 pin jacks of the PCB, and the 4 pin jacks on the PCB are respectively connected with different capacitors through wiring and then grounded, so that the length of an ESD path can be controlled between L and a/2+ L, compared with the prior art, the length of the ESD path can be effectively shortened, the path impedance is reduced, and the anti-ESD capacity of the charging power supply is effectively improved.

Example two

Referring to fig. 3, a charging power supply according to a second embodiment of the present invention includes: a USB iron shell and a PCB; the USB iron shell comprises 4 pins, the PCB comprises 4 pin jacks, and the 4 pins of the USB iron shell are respectively inserted into the 4 pin jacks of the PCB.

As shown in fig. 3, the first pin1 is inserted into the first pin insertion hole, the second pin2 is inserted into the second pin insertion hole, the third pin is inserted into the third pin insertion hole, and the fourth pin is inserted into the fourth pin insertion hole. Since the four pins are each inserted into a pin receptacle of the PCB, respectively, the pin receptacles are not shown in fig. 3, but only four pins are shown.

The first pin jack, the second pin jack, the third pin jack and the fourth pin jack are electrically connected through the wire, and the wire is grounded through a fifth capacitor, namely C6.

Specifically, the electrical connections of the traces between the pin jacks are shown in fig. 3, the first pin jack is electrically connected to the third pin jack through a first trace 301, the second pin jack is electrically connected to the fourth pin jack through a second trace 302, and the first trace 301 is electrically connected to the second trace 302 in a crossing manner. The intersection point of the first trace 301 and the second trace 302 is connected to the fifth capacitor C6 through the third trace 303 and then grounded.

After the four pin jacks are respectively connected with the fifth capacitor through the wires, because the four pins are embedded in the pin jacks, the four pins are correspondingly connected with the fifth capacitor through the bottom layer wires of the PCB and then grounded. Preferably, the traces are copper foil traces, and the fifth capacitors are SMD capacitors. The charging power supply provided by the embodiment of the invention only needs to be added with one capacitor, and compared with the first embodiment in which four capacitors are needed, the hardware cost can be saved.

when ESD comes from four pin directions, the ESD path length in each direction is about L + c because each pin is grounded through a capacitor, wherein L is the pin length, and c is the distance from each pin to the fifth capacitor.

When ESD does not come from the direction of four pins, the ESD path length must be about a/2+ L + c at maximum, wherein L is the pin length, a is the distance from the first pin to the fourth pin, and c is the distance from each pin to the second capacitor.

According to the charging power supply provided by the embodiment of the invention, the 4 pins of the connector of the charging power supply are respectively inserted into the 4 pin jacks of the PCB, and the 4 pin jacks on the PCB are respectively connected with different capacitors through wiring and then grounded, so that the path length of the ESD can be controlled between L + c and a/2+ L + c, compared with the prior art, the path length of the ESD can be effectively shortened, the path impedance is reduced, and the anti-ESD capacity of the charging power supply is effectively improved.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A charging power supply, comprising: a connector and a printed circuit board;

the printed circuit board comprises at least one pin jack and the connector comprises at least one pin inserted in the pin jack;

the pin jack is connected with the capacitor through a wire and then grounded;

the printed circuit board comprises four pin jacks which are respectively as follows: a first pin jack, a second pin jack, a third pin jack, and a fourth pin jack;

the first pin jack, the second pin jack, the third pin jack and the fourth pin jack are electrically connected through wiring; the first pin jack is electrically connected with the third pin jack through a first wire, the second pin jack is electrically connected with the fourth pin jack through a second wire, and the first wire is electrically connected with the second wire in a crossed manner;

and the intersection point of the first wire and the second wire is connected with the capacitor through a third wire and then grounded.

2. The charging power supply of claim 1, wherein the connector is a USB iron case;

the USB iron shell comprises four pins which are respectively: a first pin, a second pin, a third pin and a fourth pin;

the first pin, the second pin, the third pin and the fourth pin are sequentially arranged and enclosed to form a rectangular shape;

the first pin is inserted in the first pin insertion hole, the second pin is inserted in the second pin insertion hole, the third pin is inserted in the third pin insertion hole, and the fourth pin is inserted in the fourth pin insertion hole.

3. The charging power supply of claim 1, wherein the traces are copper foil traces.

4. The charging power supply of claim 1, wherein the capacitor is an SMD capacitor.