CN214626822U

CN214626822U - Universal adapter

Info

Publication number: CN214626822U
Application number: CN202120709044.7U
Authority: CN
Inventors: 魏居魁; 薛伟民; 王震
Original assignee: Powerland Technology Inc
Current assignee: Powerland Technology Inc
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-11-05
Anticipated expiration: 2031-04-07

Abstract

The utility model discloses a general type adapter is applicable to different input voltage grades, including power circuit, input voltage detection module, control module, input voltage detection module detects power circuit's input voltage, and to control module output input voltage detection value, control module basis the input voltage detection value calculates power circuit's rated power to broadcast to power consumption terminal rated power. The utility model discloses a general type adapter can automatically regulated adapter rated power, avoids the adapter to transship.

Description

Universal adapter

Technical Field

The present invention relates to power management of electronic devices, and more particularly to a universal adapter for adapting to different voltage environments for civil use.

Background

At present, civil voltages in various countries of the world can be divided into three types: 100V, 110V-130V and 220-230V. Universal adapters need to be able to accommodate different domestic voltages. The adapter is a constant power output, for example, 12V/5A output, and has an input current of 0.6A in a commercial voltage environment of 100V and an input current of 0.27A in a commercial voltage environment of 220V. In order to achieve the general purpose of the adapter and to be suitable for domestic voltage in different countries, the adapter is designed according to the maximum value of the input current, for example, the input current is designed according to 0.6A instead of 0.27A. This makes the universal adapter more bulky and costly than an adapter that can only accommodate a single input voltage.

SUMMERY OF THE UTILITY MODEL

The utility model provides a general type adapter is applicable to the voltage environment of different countries, can effectively avoid the adapter to transship overheated.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a universal adapter comprises a power circuit, an input voltage detection module and a control module, wherein the input voltage detection module detects input voltage of the power circuit and outputs an input voltage detection value to the control module, and the control module calculates rated power of the power circuit according to the input voltage detection value and broadcasts the rated power to a power utilization terminal.

In an embodiment of the present invention, the input voltage detection value and the database of the rated power of the power circuit are stored in the control module, and the control module searches for the corresponding rated power of the power circuit according to the input voltage detection value.

In an embodiment of the present invention, the power consumption terminal requests the adapter to provide power not greater than the rated power according to the rated power.

In an embodiment of the present invention, the input voltage detection value is a dc average value of the input voltage.

In an embodiment of the present invention, the power circuit includes an AC-DC rectifying module and a DC-DC converting module, and the AC-DC rectifying module and the DC-DC converting module are connected in series.

In an embodiment of the present invention, the input voltage detection module is connected in parallel with an output end of the AC-DC rectification module.

In an embodiment of the present invention, the DC-DC conversion module includes an isolation transformer.

In an embodiment of the present invention, the topology of the DC-DC conversion module is a flyback converter.

In an embodiment of the present invention, the input voltage detection module includes an auxiliary winding, a diode, a resistor, and a capacitor, the resistor and the capacitor are connected in parallel and then connected in series with the diode and the auxiliary winding, the auxiliary winding is coupled with the magnetic core of the isolation transformer to sense the output voltage of the AC-DC rectification module, the voltage at both ends of the capacitor is the input voltage detection value, the positive pole of the capacitor is connected with the control module.

In an embodiment of the present invention, the control module compares the input voltage detection value with a first setting value, the input voltage detection value is greater than the first setting value, the control module sets the rated power as a first rated value, the input voltage detection value is not greater than the first setting value, and the control module sets the rated power as a second rated value.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a block diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of an embodiment of the present invention.

Detailed Description

In order to make the purpose and technical solution of the embodiments of the present invention clearer, the following description will clearly and completely describe the technical solution of the embodiments of the present invention by combining the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

The terms "first," "second," "third," and the like (if any) in this disclosure are used to distinguish between similar elements and not necessarily to describe a particular order or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the subject matter described herein are, for example, capable of operation in other sequences than those illustrated or otherwise described herein. Further, wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.

The embodiment of the utility model provides a described power consumption terminal can include smart mobile phone, panel computer, palm computer, notebook computer, mobile internet equipment or wearable equipment etc. and above-mentioned power consumption terminal is the example only, and is not exhaustive, contains but not limited to above-mentioned terminal.

As shown in fig. 1, the adapter 11 is connected to the power consumption terminal 12 through a charging data line, and the adapter 11 supplies power to the power consumption terminal 12. The adapter 11 includes a power circuit 111, an input voltage detection module 112 and a control module 113, the input voltage detection module 112 detects an input voltage of the power circuit 111 and inputs an obtained input voltage detection value Vs to the control module 113, and the control module 113 calculates a rated power P1 of the power circuit 111 according to the input voltage detection value Vs and transmits the rated power P1 to the power consumption terminal 12 through a charging data line. The power consumption terminal 12 selects the smaller of the rated power P1 and the power consumption power P2 thereof as the working power P3 of the power circuit, and sends the working power P3 to the control module 113, and the control module 113 controls the power circuit 113 to output the power according to the working power P3, and supplies power to the power consumption terminal through a charging data line.

As shown in fig. 2, the power circuit 211 includes an AC-DC rectifying module 2111 formed by D1-D4 and a DC-DC converting module 2112, the AC-DC rectifying module 2111 rectifies AC power and provides the rectified AC power to the DC-DC converting module 2112, and the DC-DC converting module 2112 outputs electric energy suitable for the electric terminals 12, such as working power P3. In the present embodiment, the DC-DC conversion module 2112 uses a flyback conversion topology as an example, but the present invention is not limited thereto.

The input voltage detection module 212 comprises a winding N3, the output end of the winding N3 is connected in series with a diode D7 and then connected in parallel with a capacitor C4, the diode D7 rectifies the output current of the winding N3 and then charges a capacitor C4, the voltage of the positive electrode of the capacitor C4 is the input voltage detection value Vsens, and a resistor R2 is connected in parallel with a capacitor C4 and provides a discharge loop for the capacitor C4. The winding N3 is coupled to the transformer T1 in the DC-DC conversion module, and since the primary winding N1 of the transformer T1 is AC-coupled to the alternating current, the winding N3 is AC-coupled to the alternating current, and when the voltage level of the alternating current AC changes, for example, the alternating current AC changes from 220V to 110V in different domestic power environments. The input voltage sense Vsens changes accordingly from 0.5V to 0.25V, for example.

The control module 213 includes a driving module 2131 and a digital control module 2132, when the digital control module 2132 is powered on, the power consumption terminal is not loaded, that is, the adapter outputs in an idle state, the digital control module 2132 calculates and converts the obtained input voltage detection value Vsens into the rated power P1, and broadcasts the rated power P1 to the power consumption terminal 22 through the output module 23 by using the PD protocol. The output module 23 is also a terminal of the charging data line. The process of calculating the rated power P1 using the input voltage detection value Vsens may be implemented using a calculation formula, or implemented using a look-up table, or implemented by comparing with a reference value, for example: the digital control module 2132 compares the input voltage detection value Vsens with a first set value Vset, the input voltage detection value Vsens is greater than the first set value Vset, the rated power P1 is set to a first rated value by the digital control module 2132, the input voltage detection value Vsens is not greater than the first set value Vset, and the rated power P1 is set to a second rated value by the digital control module 2132.

The power management module (not shown in the figure) in the electric terminal 22 selects the smaller of the rated power P1 and the power consumption power P2 of the electric terminal 22 as the working power P3 of the power circuit, and sends the working power P3 to the digital control module 2132, the digital control module 2132 sends a driving signal to the driving module 2131 according to the working power P3, and the driving module 2131 controls the on and off of the switch Q1, so that the DC-DC conversion module 2112 outputs the working power P3, and supplies power to the electric terminal 22 through the charging data line.

The output voltage, the current information and the closed-loop control of the DC-DC conversion module 2112 are all implemented in a digital control module 2132, the digital control module 2132 supplies the output of the PI loop to a primary side driver module 2131 through an optocoupler (not shown in the figure), and the driver module 2131 can be implemented by a PWM control chip NCP1342 of the armeni (manufacturer). The digital control module 2132 may be implemented by an english integrated core (manufacturer) PD protocol chip IP 2726S.

The design scheme of the utility model provides a general type adapter can initiatively adapt to different national input voltage scope, avoids the device waste that the design rating through unlimited increase circuit caused.

Although the present invention has been described with reference to the above embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention.

Claims

1. A universal adapter is characterized by comprising a power circuit, an input voltage detection module and a control module, wherein the input voltage detection module detects input voltage of the power circuit and outputs an input voltage detection value to the control module, and the control module calculates rated power of the power circuit according to the input voltage detection value and broadcasts the rated power to a power consumption terminal.

2. The universal adapter as claimed in claim 1, wherein the control module stores a database of the input voltage detection values and the power ratings of the power circuits, and the control module searches the corresponding power ratings of the power circuits according to the input voltage detection values.

3. A universal adapter according to claim 2, wherein said powered terminal requests said adapter to provide power no greater than said power rating based on said power rating.

4. The universal adapter as claimed in claim 1, wherein said input voltage detection value is a dc average value of the input voltage.

5. A universal adapter as recited in claim 1, wherein said power circuit comprises an AC-DC rectifying module and a DC-DC converting module, said AC-DC rectifying module and said DC-DC converting module being connected in series.

6. The universal adapter as recited in claim 5 wherein said input voltage detection module is connected in parallel with an output of said AC-DC rectification module.

7. The universal adapter as recited in claim 5, wherein said DC-DC conversion module comprises an isolation transformer.

8. The universal adapter as recited in claim 7, wherein the topology of said DC-DC conversion module is a flyback converter.

9. The universal adapter as claimed in claim 7, wherein the input voltage detection module comprises an auxiliary winding, a diode, a resistor and a capacitor, the resistor and the capacitor are connected in series with the diode and the auxiliary winding after being connected in parallel, the auxiliary winding is coupled to the magnetic core of the isolation transformer to sense the output voltage of the AC-DC rectification module, the voltage across the capacitor is the input voltage detection value, and the positive electrode of the capacitor is connected to the control module.

10. The universal adapter as claimed in claim 2, wherein the control module compares the sensed input voltage value with a first set point, the sensed input voltage value being greater than the first set point, the control module sets the power rating to a first set point, the sensed input voltage value being not greater than the first set point, and the control module sets the power rating to a second set point.