CN210958164U

CN210958164U - Switch power adapter

Info

Publication number: CN210958164U
Application number: CN201922311745.0U
Authority: CN
Inventors: 莫泽文; 赵近莲; 尹军民
Original assignee: Dongguan Double Electronics Co ltd
Current assignee: Dongguan Double Electronics Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-07-07
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a switching power supply adapter, including AC input module, rectification filter module, high frequency transformer, switch tube, output rectification filter circuit, sampling line, comparison circuit and on-off control circuit, still including output X type filter circuit, AC input module is connected to rectification filter module's input, and high frequency transformer is connected to rectification filter module's output, and high frequency transformer still connects switch tube and output rectification filter circuit respectively, and output rectification filter circuit still connects output X type filter circuit, the utility model relates to a product is applicable to small household appliances, lamps and lanterns, IT class, product power supply such as AV class. The electromagnetic interference/electromagnetic compatibility (EMI/EMC) power supply has the advantages of simple design structure, convenience in batch production, higher efficiency, small self heat productivity of a product, quick heat dissipation, good EMI/EMC effect, stable performance and safety and reliability meeting the safety requirements.

Description

Switch power adapter

Technical Field

The utility model relates to a power adapter technical field specifically is a switching power supply adapter.

Background

The Power adapter (Power adapter) is a Power supply conversion device for small portable electronic equipment and electronic appliances, generally comprises components such as a shell, a transformer, an inductor, a capacitor, a control IC (integrated circuit), a PCB (printed circuit board) and the like, and the working principle of the Power adapter is that alternating current input is converted into direct current output; according to the connection mode, the device can be divided into a wall-inserting type and a desktop type. The intelligent anti-theft device is widely matched with security cameras, set top boxes, routers, light bars, massage instruments and other equipment.

Most of the existing power adapters have complex structures, inconvenient use and unstable performance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a switching power supply adapter to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a switching power supply adapter, includes AC input module, rectification filter module, high frequency transformer, switch tube, output rectification filter circuit, sampling line, comparison circuit and on-off control circuit, still includes output X type filter circuit, AC input module is connected to rectification filter module's input, and high frequency transformer is connected to rectification filter module's output, and high frequency transformer still connects switch tube and output rectification filter circuit respectively, and output rectification filter circuit still connects output X type filter circuit, and output X type filter circuit still connects two output DC interfaces and sampling circuit, and reference voltage module and comparison circuit are still connected respectively to the sampling circuit, and comparison circuit still connects the on-off control circuit, and on-off control circuit still connects the switch tube, and the high frequency transformer is still connected to the switch tube.

As a further aspect of the present invention: the reference voltage module adopts a three-terminal adjustable reference source chip.

As a further aspect of the present invention: the output X-type filter circuit comprises a diode D4, a resistor UR, a capacitor EC3 and a capacitor EC4, the anode of the diode D4 is connected with a resistor R23, a resistor R24 and a high-frequency transformer, the other end of the resistor R23 is connected with the other end of the resistor R24 and a capacitor C5, and the other end of the capacitor C5 is connected with the capacitor EC3, a capacitor EC4, a resistor R31, a reference voltage module and a comparison circuit.

As a further aspect of the present invention: the rectifying and filtering module comprises a rectifier and a filtering capacitor.

As a further aspect of the present invention: the voltage of the alternating current input module is 100-220V alternating current.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model relates to a product is applicable to products power supply such as little household electrical appliances, lamps and lanterns, IT class, AV class. The electromagnetic interference/electromagnetic compatibility (EMI/EMC) power supply has the advantages of simple design structure, convenience in batch production, higher efficiency, small self heat productivity of a product, quick heat dissipation, good EMI/EMC effect, stable performance and safety and reliability meeting the safety requirements.

Drawings

Fig. 1 is an overall block diagram of the present invention.

Fig. 2 is a circuit diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1-2, in an embodiment of the present invention, a switching power adapter includes an ac input module, a rectifying and filtering module, a high frequency transformer, a switching tube, an output rectifying and filtering circuit, a sampling circuit, a comparing circuit, a switch control circuit, and an output X-filter circuit, the input end of the rectification filter module is connected with the alternating current input module, the output end of the rectification filter module is connected with the high-frequency transformer, the high-frequency transformer is further respectively connected with the switch tube and the output rectification filter circuit, the output rectification filter circuit is further connected with the output X-type filter circuit, the output X-type filter circuit is further connected with two output DC interfaces and a sampling circuit, the sampling circuit is further respectively connected with the reference voltage module and the comparison circuit, the comparison circuit is further connected with the switch control circuit, the switch control circuit is further connected with the switch tube, and the switch tube is further connected with the high-frequency transformer.

The utility model relates to a product is applicable to products power supply such as little household electrical appliances, lamps and lanterns, IT class, AV class. The electromagnetic interference/electromagnetic compatibility (EMI/EMC) power supply has the advantages of simple design structure, convenience in batch production, higher efficiency, small self heat productivity of a product, quick heat dissipation, good EMI/EMC effect, stable performance and safety and reliability meeting the safety requirements.

Example 2: on the basis of the embodiment 1, the reference voltage module adopts a three-terminal adjustable reference source chip. The output X-type filter circuit comprises a diode D4, a resistor UR, a capacitor EC3 and a capacitor EC4, the anode of the diode D4 is connected with a resistor R23, a resistor R24 and a high-frequency transformer, the other end of the resistor R23 is connected with the other end of the resistor R24 and a capacitor C5, and the other end of the capacitor C5 is connected with the capacitor EC3, the capacitor EC4, the resistor R31, a reference voltage module and a comparison circuit. The rectifying and filtering module comprises a rectifier and a filtering capacitor. The voltage of the alternating current input module is 100-220V alternating current.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a switching power supply adapter, includes AC input module, rectification filter module, high frequency transformer, switch tube, output rectification filter circuit, sample circuit, comparison circuit and on-off control circuit, its characterized in that still includes output X type filter circuit, AC input module is connected to rectification filter module's input, and high frequency transformer is connected to rectification filter module's output, and high frequency transformer still connects switch tube and output rectification filter circuit respectively, and output rectification filter circuit still connects output X type filter circuit, and output X type filter circuit still connects two output DC interfaces and sample circuit, and reference voltage module and comparison circuit are still connected respectively to the sample circuit, and on-off control circuit still is connected to the comparison circuit, and on-off control circuit still connects the switch tube, and the high frequency transformer is still connected to the switch tube.

2. The adapter as claimed in claim 1, wherein the reference voltage module is a three-terminal adjustable reference source chip.

3. The adapter as claimed in claim 1, wherein the output X-filter line includes a diode D4, a resistor UR, a capacitor EC3 and a capacitor EC4, an anode of the diode D4 is connected to a resistor R23, a resistor R24 and a high frequency transformer, the other end of the resistor R23 is connected to the other end of the resistor R24 and a capacitor C5, and the other end of the capacitor C5 is connected to the capacitor EC3, a capacitor EC4, a resistor R31, a reference voltage module and a comparison line.

4. The switching power adapter as claimed in claim 1, wherein the rectifying and filtering module comprises a rectifier and a filtering capacitor.

5. The adapter as claimed in claim 4, wherein the voltage of the AC input module is 100-220V AC.