CN213754050U

CN213754050U - Improved charger

Info

Publication number: CN213754050U
Application number: CN202022698381.9U
Authority: CN
Inventors: 王爱花
Original assignee: Guangdong Mcdodo Industrial Co ltd; Dongguan Baolaipo Communication Technology Co ltd
Current assignee: Guangdong Mcdodo Industrial Co ltd; Dongguan Baolaipo Communication Technology Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-07-20
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses an improved generation charger, including casing, first circuit board, second circuit board, third circuit board and input rectification filter module, the synchronous rectifier module of transformer, feedback output and agreement identification module and PWM control and switch module, the synchronous rectifier module of transformer is connected to PWM control and switch module, and feedback output and agreement identification module pass through opto-coupler connection PWM control and switch module. The utility model discloses a function such as PWM control, agreement discernment, output control of realizing the circuit is cooperated jointly such as PWM control chip, feedback output and agreement recognition module chip, with each part reasonable setting on corresponding circuit board to adopt the opto-coupler to link up, so can be keeping product volume, power density and can obviously the cost under the prerequisite that reaches equal level. And the anti-interference capacitor adopts a patch capacitor, so that automation equipment can be better utilized for assembly, and the assembly efficiency is improved.

Description

Improved charger

Technical Field

The utility model relates to a charger technical field especially relates to an optimize structural layout's charger.

Background

With the improvement of living standard, portable electronic products such as smart phones, tablet computers, media players and the like become one of the necessary products in daily life of people, and the current electronic products generally need to be charged through a charger. The high power and miniaturization of the charger are the future trends, and in order to achieve the purpose, manufacturers in the industry make various innovative designs. For example, there is a charger, which is divided into three parts by a charging circuit, and is respectively disposed on three circuit boards, and the three circuit boards are connected by a connector transformer, so that not only three circuit boards are mutually independent, but also electromagnetic interference between each other is greatly reduced, and simultaneously, by reducing the volume of the product, power and power density are increased. However, the charger has some problems, for example, because a chip with a very high integration level is used as a main control chip, which integrates multiple functions such as PWM control, output control, etc., although the integration level of the circuit is improved and the miniaturization of the product is realized, the cost is greatly increased, and the current market price of such a chip is about four-fold, which increases the cost of the entire charger. Moreover, this kind of present charger adopts to participate in electric capacity and is used for anti-jamming and suppression crest, and this kind of electric capacity need be pegged graft on the circuit board through the manual work when the assembly, then carries out the soldering and fixes, and its assembly efficiency is low, and personnel intensity of labour is big, and the welding is fixed there is the rosin joint risk.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is the defect of prior art, provide an improved generation charger that structural design is more reasonable, assembly operation is more convenient and fast, the cost is lower.

In order to solve the technical problem, the utility model adopts the following technical scheme: an improved charger comprises a shell, a first circuit board, a second circuit board, a third circuit board and circuit modules on the circuit boards, wherein the first circuit board and the third circuit board are arranged in parallel at a certain interval; the circuit module is including input rectification filter module, transformer synchronous rectification module and feedback output and agreement identification module, and transformer synchronous rectification module connects input rectification filter module, its characterized in that: the transformer synchronous rectification circuit also comprises a PWM control and switch module, wherein the PWM control and switch module is connected with the transformer synchronous rectification module; the input rectification filter module, the PWM control and switch module and the transformer synchronous rectification module are arranged on the first circuit board together, the feedback output and protocol identification module is arranged on the third circuit board, the feedback output and protocol identification module is connected with the PWM control and switch module through an optical coupler, and the optical coupler is arranged on the second circuit board.

Furthermore, the device also comprises an anti-interference capacitor which is arranged on the second circuit board; the anti-interference capacitor is a patch capacitor and is connected with the feedback output and protocol identification module. Adopt the paster electric capacity to make anti-interference electric capacity carry out the paster equipment through utilizing automation equipment, need not grafting and welding, can improve the packaging efficiency by a wide margin.

And a secondary filter capacitor is also arranged on the third circuit board and connected to the transformer synchronous rectification module so as to filter the output power supply.

The feedback output and protocol identification module adopts a chip with the model of IP2723TCO, and the 14 th pin, the 15 th pin, the 16 th pin, the 17 th pin and the 22 nd pin of the feedback output and protocol identification module are respectively connected with an output interface JK 1.

The PWM control and switch module comprises a PWM control chip U1 and a switch MOS tube Q1, the model of the PWM control chip U1 is AP8268, and the 4 th pin and the 6 th pin of the PWM control chip U1 are connected with the switch MOS tube Q1; the optical coupler is respectively connected with the No. 2 pin of the PWM control chip U1 and the No. 2 pin, the No. 3 pin, the No. 5 pin and the No. 24 pin of the chip IP2723TCO of the feedback output and protocol identification module.

The input end of the transformer synchronous rectification module is respectively connected with the 4 th pin, the 5 th pin and the 6 th pin of the PWM control chip U1, and the output end of the transformer synchronous rectification module is respectively connected with the 22 nd pin, the 23 rd pin and the 24 th pin of the chip IP2723TCO of the optical coupler, the feedback output and protocol identification module, and is connected with the output interface JK 1.

The utility model discloses a PWM control chip, the PWM control of common cooperation realization circuit such as feedback output and agreement discernment module chip, agreement discernment, functions such as output control, adopt the higher chip of integrated level to change into more dispersed structure in being equivalent to current like product, through with each part reasonable setting on corresponding circuit board, and adopt the opto-coupler to link up, so can be in keeping the product volume, power density reaches under the prerequisite of equal level, the cost of comparatively obvious reduction product, each component total cost after the aforesaid part is about 2 yuan, price about 4 yuan lower half than traditional integrated chip. And anti-interference electric capacity adopts paster electric capacity to independently set up on the second circuit board, can utilize automation equipment to assemble better, be favorable to improving the efficiency of equipment, and prevent to produce the risk of rosin joint.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

fig. 2 is a schematic view of the internal structure of the present invention from another angle;

fig. 3 is a schematic circuit diagram of the present invention.

In the figure, 1 is a first circuit board, 2 is a second circuit board, 3 is a third circuit board, 4 is an input rectifying and filtering module, 5 is a PWM control and switching module, 6 is an optical coupler, 7 is an anti-interference capacitor, 8 is a feedback output and protocol identification module, and 9 is a secondary filter capacitor.

Detailed Description

In this embodiment, referring to fig. 1, fig. 2, and fig. 3, the improved charger includes a housing (not shown), a first circuit board 1, a second circuit board 2, a third circuit board 3, and circuit modules on the circuit boards, where the first circuit board 1 and the third circuit board 3 are arranged in parallel at a certain distance, and the second circuit board 2 is vertically connected between the end-near edge positions of the first circuit board 1 and the third circuit board 3; the circuit module comprises an input rectification filter module 4, a transformer synchronous rectification module and a feedback output and protocol identification module 8, wherein the transformer synchronous rectification module is connected with the input rectification filter module 4; the transformer synchronous rectification circuit also comprises a PWM control and switch module 5, wherein the PWM control and switch module 5 is connected with the transformer synchronous rectification module; the input rectifying and filtering module 4, the PWM control and switch module 5 and the transformer synchronous rectifying module are arranged on the first circuit board 1, the feedback output and protocol identification module 8 is arranged on the third circuit board 3, the feedback output and protocol identification module 8 is connected with the PWM control and switch module 5 through an optical coupler 6 (namely, U2), and the optical coupler 6 is arranged on the second circuit board 2.

The anti-interference capacitor 7 is arranged on the second circuit board 2; the anti-interference capacitor 7 is a patch capacitor and is connected with the feedback output and protocol identification module 8. Adopt the paster electric capacity to make anti-interference electric capacity 7 carry out the paster equipment through utilizing automation equipment, need not grafting and welding, can improve the packaging efficiency by a wide margin.

And a secondary filter capacitor 9 is further arranged on the third circuit board 3, and the secondary filter capacitor 9 is connected in the transformer synchronous rectification module to filter the output power supply.

The feedback output and protocol identification module 8 adopts a chip with the model of IP2723TCO, and the 14 th pin, the 15 th pin, the 16 th pin, the 17 th pin and the 22 nd pin of the module are respectively connected with an output interface JK 1.

The PWM control and switch module 5 comprises a PWM control chip U1 and a switch MOS tube Q1, the model of the PWM control chip U1 is AP8268, and the 4 th pin and the 6 th pin of the PWM control chip U1 are connected with the switch MOS tube Q1; the optocoupler U2 is respectively connected with the 2 nd pin of the PWM control chip U1 and the 2 nd, 3 rd, 5 th and 24 th pins of the chip IP2723TCO of the feedback output and protocol identification module.

The input end of the transformer synchronous rectification module is respectively connected with the 4 th pin, the 5 th pin and the 6 th pin of the PWM control chip U1, and the output end of the transformer synchronous rectification module is respectively connected with the optocoupler U2, the 22 nd pin, the 23 rd pin and the 24 th pin of the chip IP2723TCO of the feedback output and protocol identification module 8, and is connected with the output interface JK 1.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, i.e. the present invention is intended to cover all equivalent variations and modifications within the scope of the present invention.

Claims

1. An improved charger comprises a shell, a first circuit board, a second circuit board, a third circuit board and circuit modules on the circuit boards, wherein the first circuit board and the third circuit board are arranged in parallel at a certain interval; the circuit module is including input rectification filter module, transformer synchronous rectification module and feedback output and agreement identification module, and transformer synchronous rectification module connects input rectification filter module, its characterized in that: the transformer synchronous rectification circuit also comprises a PWM control and switch module, wherein the PWM control and switch module is connected with the transformer synchronous rectification module; the input rectification filter module, the PWM control and switch module and the transformer synchronous rectification module are arranged on the first circuit board together, the feedback output and protocol identification module is arranged on the third circuit board, the feedback output and protocol identification module is connected with the PWM control and switch module through an optical coupler, and the optical coupler is arranged on the second circuit board.

2. The improved charger according to claim 1, wherein: the anti-interference capacitor is arranged on the second circuit board; the anti-interference capacitor is a patch capacitor and is connected with the feedback output and protocol identification module.

3. The improved charger according to claim 1, wherein: and a secondary filter capacitor is also arranged on the third circuit board and connected to the transformer synchronous rectification module.

4. The improved charger according to claim 1, wherein: the feedback output and protocol identification module adopts a chip with the model of IP2723TCO, and the 14 th pin, the 15 th pin, the 16 th pin, the 17 th pin and the 22 nd pin of the feedback output and protocol identification module are respectively connected with an output interface JK 1.

5. The improved charger according to claim 4, wherein: the PWM control and switch module comprises a PWM control chip U1 and a switch MOS tube Q1, the model of the PWM control chip U1 is AP8268, and the 4 th pin and the 6 th pin of the PWM control chip U1 are connected with the switch MOS tube Q1; the optical coupler is respectively connected with the No. 2 pin of the PWM control chip U1 and the No. 2 pin, the No. 3 pin, the No. 5 pin and the No. 24 pin of the chip IP2723TCO of the feedback output and protocol identification module.

6. The improved charger according to claim 5, wherein: the input end of the transformer synchronous rectification module is respectively connected with the 4 th pin, the 5 th pin and the 6 th pin of the PWM control chip U1, and the output end of the transformer synchronous rectification module is respectively connected with the 22 nd pin, the 23 rd pin and the 24 th pin of the chip IP2723TCO of the optical coupler, the feedback output and protocol identification module, and is connected with the output interface JK 1.