CN107968574B - Power adapter system and power adapter for home network terminal equipment - Google Patents
Power adapter system and power adapter for home network terminal equipment Download PDFInfo
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- CN107968574B CN107968574B CN201711398102.3A CN201711398102A CN107968574B CN 107968574 B CN107968574 B CN 107968574B CN 201711398102 A CN201711398102 A CN 201711398102A CN 107968574 B CN107968574 B CN 107968574B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a power supply adapter system and a power supply adapter for home network terminal equipment, which solve the problem that most of the users currently have a comprehensive information box in the home and only one power supply jack at the first information point, and the power supply adapter system for home network terminal equipment comprises a power supply, a main circuit, a control circuit and a power supply distribution module which are connected in sequence; the main circuit is connected with the power supply and is used for limiting the impact current input instantly when the power supply is switched on, rectifying and filtering and providing a direct current power supply according to the load requirement; the control circuit is connected with the main circuit and used for stabilizing output and protecting the circuit according to the real-time condition of the circuit; the power distribution module is connected with the main circuit and is used for distributing one path of direct current output into at least three paths of direct current output, and each path of output power is dynamically distributed according to actual use power consumption, so that the purposes of saving equipment investment, ensuring reliable equipment power supply connection and reducing maintenance cost of household networking equipment are achieved.
Description
Technical Field
The invention relates to the field of electronic power supplies, in particular to a power supply adapter system and a power supply adapter for home network terminal equipment.
Background
With the changes of the service and access network of the broadcast television network operator, the demands of the home network terminal equipment are increasing, and in order to develop the bidirectional service, the home networking equipment needs cable television optical receiver equipment, set top box equipment, fiber-to-home data terminal equipment and home broadband router equipment. In order to meet the power supply requirements of home networking equipment, such as cable television optical receiver equipment, set-top box equipment, fiber-to-the-home data terminal equipment and home broadband router equipment, a power supply adapter is required inside the home.
The power adapter in the prior art generally adopts a wall-inserted power adapter, and the wall-inserted power adapter is power supply conversion equipment of small portable electronic equipment and electronic appliances, and generally consists of components such as a shell, a transformer, an inductor, a capacitor, a control IC, a PCB (printed circuit board) and the like, and is widely matched with a set top box, optical fiber to user terminal equipment, home internal communication networking terminal equipment and the like in a connection mode.
However, since the current home networking equipment of the broadcast television operator needs power supply of a plurality of terminal equipment such as cable television optical receiver equipment, set top box equipment, fiber to the home data terminal equipment, home broadband router and the like, the terminal equipment is basically and intensively placed in a comprehensive information box or a first information point of a user home, and each terminal equipment is powered by using a wall-plug type power adapter, at least three power adapters are needed inside the home, and at least three power jacks are needed to be provided at the same time, and the power supply is realized through a power expansion socket.
At present, only one power jack is arranged in a comprehensive information box or a first information access point in a user family, and the power supply requirement of terminal equipment cannot be met. If a power expansion socket is added to each user, hundreds of thousands or even millions of users in a small and medium city can waste tens of millions of cost due to the addition of the power expansion socket.
After the bidirectional service is opened, the stability of equipment and the service is critical, and the addition of a power supply expansion socket at a first information point of a user's home information box or home may cause unstable connection between a terminal equipment adapter and the expansion socket due to the problems of human factors, power supply socket quality and the like, thereby causing interruption of television service and affecting safe broadcasting; meanwhile, the interruption of the bidirectional service can be caused, the user experience is affected, and huge maintenance cost is brought to the broadcast and television operators.
Accordingly, the prior art is in need of improvement.
Disclosure of Invention
The invention aims to provide a power supply adapter system and a power supply adapter for home network terminal equipment, so as to achieve the purposes of saving equipment investment, reliably connecting equipment power supply and reducing maintenance cost of home networking equipment.
The technical aim of the invention is realized by the following technical scheme:
a home network terminal apparatus power adaptation system, comprising: the power supply, the main circuit, the control circuit and the power distribution module;
the power supply is used for connecting with the mains supply;
the main circuit is connected with the power supply and is used for limiting the impact current input instantly when the power supply is switched on, rectifying and filtering and providing a direct current power supply according to the load requirement;
the control circuit is connected with the main circuit and used for stabilizing output and protecting the circuit according to the real-time condition of the circuit;
the power distribution module is connected with the main circuit and is used for distributing one path of direct current output into at least three paths of direct current output, and each path of output power is dynamically distributed according to actual use power consumption.
The power supply adapting system of the home network terminal equipment comprises the following components: the main circuit comprises a rectifying and filtering circuit, an alternating current generating and detecting circuit and a direct current output circuit which are connected in sequence; the alternating current power supply obtains direct current voltage through the rectifying and filtering circuit, one path of the voltage is added to the control circuit through the transformer T1, and the other path of the voltage is reduced to obtain starting voltage to supply power to the power distribution module.
The power supply adapting system of the home network terminal equipment comprises the following components: the rectifying and filtering circuit comprises a rectifying bridge B1 for converting alternating current into direct current, a fourth resistor R4 for overload protection and a first capacitor C1 for filtering, wherein one end of the fourth resistor R4 is connected to the rectifying bridge B1, the other end of the fourth resistor R4 is connected to the alternating current generating and detecting circuit 12, and one end of the first capacitor C1 is connected to the rectifying bridge B1, and the other end of the first capacitor C1 is grounded.
The power supply adapting system of the home network terminal equipment comprises the following components: the ac generating and detecting circuit 12 includes a third capacitor C3 connected to the rectifier bridge B1, and a fifth resistor R5 connected to the third capacitor C3, where one end of the third capacitor C3 is connected to one end of the fourth resistor R4, and the other end is connected to one end of the input terminal of the transformer T1 through the fifth resistor R5.
The power supply adapting system of the home network terminal equipment comprises the following components: the ac generating and detecting circuit 12 further includes a transformer T1, a second capacitor C2, and a third resistor R3 connected in parallel with the second capacitor C2, where one end of the second capacitor C2 and the third resistor R3 are connected in parallel, and the other end of the second capacitor C2 and the third resistor R3 are connected to the first diode D1, and the other end of the second capacitor C2 is connected to one end of the input end of the transformer T1, and the other input end of the transformer T1 is connected to the other end of the first diode D1.
The power supply adapting system of the home network terminal equipment comprises the following components: the dc output circuit 13 includes a second diode D2 and a third diode D3 respectively connected to the output terminal of the transformer T1, where one end of the second diode D2 is connected to one output terminal of the transformer T1, and the other end is connected to the power distribution module 30; one end of the third diode D3 is connected to the other output end of the transformer T1, and the other end is connected to the power distribution module 30; the second diode D2 and the third diode D3 transmit the rectified dc power to the power distribution module 30.
The power supply adapting system of the home network terminal equipment comprises the following components: the power distribution module divides one path of direct current output into three paths of direct current output, a fourth capacitor C4 is connected to the power distribution module 30, and the other end of the fourth capacitor C4 is connected to the common ground terminal of the transformer T1.
The power supply adapting system of the home network terminal equipment comprises the following components: the control circuit 20 includes a switching tube Q1, a base electrode of the switching tube Q1 is connected to one end of the fourth resistor R4, an emitter electrode of the switching tube (Q1) is grounded through the first resistor R1, and a collector electrode C of the switching tube Q1 is connected to one end of the first diode D1.
A power adapter comprising an adapter body, wherein further comprising: the power supply, the main circuit and the control circuit of the home network terminal equipment power supply adapting system are arranged in the adapter body, the adapter body is connected to the power distribution module through a connecting wire, and the power supply is provided with a plug for connecting with mains supply.
The power supply adapter is characterized in that the power supply distribution module is externally connected with at least three paths of direct current output plugs, a self-detection circuit is arranged in the power supply distribution module and used for detecting the required output voltage or current of a load, each path of output is automatically regulated, and each path of output can be automatically adapted to the actual output voltage of 5-12V required to be output by the load.
In summary, the invention has the following beneficial effects: by changing one path of direct current output into three paths of direct current output, the power adapter only needs one power jack, so that the investment of equipment is saved, the power supply connection of the equipment is reliable, and the maintenance cost of household networking equipment is reduced.
Drawings
Fig. 1 is a functional block diagram of an overall power adapter in accordance with an embodiment of the present invention.
Fig. 2 is an overall circuit diagram of the power adapter system in the present embodiment.
Fig. 3 is a schematic diagram of the overall structure of the power adapter according to the embodiment of the present invention.
Fig. 4 is a top view of an adapter body in an embodiment of the present invention.
Fig. 5 is a bottom view of an adapter body in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
As shown in fig. 1, fig. 1 is a functional block diagram of the whole power adapter in this embodiment, and the power adapter for home network terminal equipment in this embodiment includes an adapter body 40 and a power distribution module 30 that are sequentially connected. In this embodiment, the adapter body 40 converts ac mains supply into 5-12V voltage, as shown in fig. 1, and in this preferred embodiment converts the input 220V ac voltage into 12V DC voltage, the total output current is 2A, and the three paths of DC12V output are divided by the power distribution module 30 for illustration, as shown in fig. 1, as described in detail below.
As shown in fig. 2, fig. 2 is an overall circuit diagram of the power adapter system in the present embodiment, which includes a power supply 50, a main circuit 10, a control circuit 20, and a power distribution module 30. Wherein the power supply 50, the main circuit 10 and the control circuit 20 are disposed in the adapter body 40 and connected to the power distribution module 30 through a connection line, thereby forming the power adapter according to the embodiment of fig. 1 of the present invention. In the embodiment of the present invention, the power distribution module 30 may be externally connected with at least three dc output plugs, and preferably, each output may be set to be automatically adapted to the actual output voltage of 5-12V required to be output by the load. That is, the power distribution module 30 can detect the required output voltage or current of the load first, and automatically adjust each output path, so that the use is convenient for the user. The power distribution module is internally provided with a self-detection circuit for detecting the required output voltage or current of the load, each path of output is automatically regulated, and each path of output can be automatically adapted to the actual output voltage of 5-12V required by the load. Specific examples are as follows:
the power supply 50 is provided with a plug for connection to mains, for example 220V mains.
The main circuit 10 is connected with the power supply, and is used for limiting the impact current input instantly when the power supply is turned on, filtering noise waves existing in the power grid and preventing noise waves generated by the power grid from being fed back to the power grid, directly rectifying the power grid alternating current into smoother direct current, and providing stable and reliable direct current according to the load requirement.
The control circuit 20 is connected to the main circuit, and is used for stabilizing output and protecting the circuit according to the real-time condition of the circuit.
The power distribution module 30 is connected with the main circuit 10, and is configured to distribute one path of DC12V/2A output into three paths of DC12V direct current output, where each path of output power can be dynamically distributed according to actually used power consumption, so as to improve the utilization rate of the power consumption, and the total power consumption does not exceed 24W.
The main circuit 10 comprises a rectifying and filtering circuit 11, an alternating current generating and detecting circuit 12 and a direct current output circuit 13 which are connected in sequence; the ac power supply 220V is subjected to the rectifying and filtering circuit 11 to obtain a dc voltage 12V, one path of the dc voltage is applied to the control circuit 20 through the transformer T1, and the other path of the dc voltage is reduced to obtain a starting voltage for supplying power to the power distribution module 30.
As shown in fig. 2, the rectifying and filtering circuit 11 includes a rectifying bridge B1 for converting ac power into dc power, a fourth resistor R4 for overload protection, and a first capacitor C1 for filtering, where one end of the fourth resistor R4 is connected to the rectifying bridge B1, the other end is connected to the ac generating and detecting circuit 12, and one end of the first capacitor C1 is connected to the rectifying bridge B1, and the other end is grounded.
The ac generating and detecting circuit 12 includes a third capacitor C3 connected to the rectifier bridge B1, and a fifth resistor R5 connected to the third capacitor C3, where one end of the third capacitor C3 is connected to one end of the fourth resistor R4, and the other end is connected to one end of the input terminal of the transformer T1 through the fifth resistor R5.
As shown in fig. 2, the ac generating and detecting circuit 12 further includes a transformer T1, a second capacitor C2, and a third resistor R3 connected in parallel with the second capacitor C2, wherein one end of the second capacitor C2 is connected to the first diode D1 after being connected in parallel with the third resistor R3, the other end of the second capacitor C2 is connected to one end of the input end of the transformer T1, and the other input end of the transformer T1 is connected to the other end of the first diode D1.
The dc output circuit 13 includes a second diode D2 and a third diode D3 respectively connected to the output terminal of the transformer T1, where one end of the second diode D2 is connected to one output terminal of the transformer T1, and the other end is connected to the power distribution module 30; one end of the third diode D3 is connected to the other output end of the transformer T1, and the other end is connected to the power distribution module 30; the second diode D2 and the third diode D3 transmit the rectified dc power to the power distribution module 30.
The power distribution module 30 is an integrated circuit and includes a control IC, the power distribution module 30 divides one path of dc output into at least three paths of dc output, as shown in fig. 2, the power distribution module 30 is connected with a fourth capacitor C4, and the other end of the fourth capacitor C4 is connected to a common ground terminal of the transformer T1.
As shown in fig. 2, the control circuit 20 includes a switching tube Q1, a base electrode of the switching tube Q1 is connected to one end of a fourth resistor R4, an emitter electrode of the switching tube Q1 is grounded through the first resistor R1, and a collector electrode of the switching tube Q1 is connected to one end of a first diode D1.
The working principle of the embodiment of the invention is as follows: the 220V alternating voltage is rectified and filtered to obtain 300V direct voltage, one path of the voltage is added to the switching tube Q1 through the transformer T1, the other path of the voltage is reduced to obtain starting voltage to supply power to the power distribution module 30, and the starting voltage generates 5V reference voltage output from an IC reference voltage generator inside the power distribution module 30. The output current generates an induced voltage on the transformer T1, and the induced voltage generated by the magnetic core coupled to the leg winding is rectified and filtered by the second diode D2, the third diode D3 and the fourth capacitor C4 to obtain a 12V direct-current voltage output.
In order to ensure stable output voltage, the output voltage of the output end 12V is subjected to error sampling, the sampled voltage is compared and amplified by the control circuit 20, and the width of output pulse is changed by an internal integrated circuit of the control circuit 20, so that the switching time of the switching tube Q1 is changed, and the purpose of adjusting the output voltage is achieved. After such a feedback control process, the output voltage is finally stabilized at 12V.
The circuit is also provided with an overvoltage and overcurrent protection circuit: the induced voltage of the transformer T1 is rectified and filtered to obtain a voltage, which is sent to the power distribution module 30 to maintain the normal operation of the power distribution module 30, where the 300V voltage is reduced and supplied as a starting voltage.
When the output voltage is raised due to a certain reason, the voltage of the power distribution module 30 will also be raised, when the voltage is raised to above 22V, the diode will breakdown reversely, so that the voltage of the overcurrent protection end of the power distribution module 30 is raised to above lV, at this time, the internal IC of the power distribution module 30 will output a pulse which is turned off, so that the circuit stops working, and the purpose of overvoltage protection is achieved.
When the current of the switching tube Q1 is excessively large for some reason, the voltage of two ends of the overcurrent sampling resistor connected with the S electrode of the switching tube Q1 is increased, and when the voltage is increased to enable the voltage of the overcurrent protection end of the power distribution module 30 to be higher than 1V, the output of the power distribution module 30 is cut off to play a role of overcurrent protection. The resistor and the capacitor connected with the D pole of the switching tube Q1 form a peak absorption loop, and peak induction pulse generated on the winding of the switching tube Q1 in the cut-off period T1 is absorbed, so that the switching tube Q1 is prevented from being broken down.
As shown in fig. 3 to 5, the power plug 42 is mounted on the adapter body 40 and the LED lamp 41 is embedded in the power plug, the high-temperature-resistant fireproof flame-retardant material is used as the material of the outer shell of the adapter body 40, and the PC+ABS plastic is adopted as the outer shell of the power plug, so that the power plug has excellent molding processability, good fluidity, high strength, easy processing of the material, good processing dimensional stability and surface gloss, easy coating and coloring, and can also perform secondary processing performances such as metal spraying, electroplating, welding, bonding and the like.
The invention adopts one path of AC 220V input, only needs one power jack, and solves the problems that most of users currently have comprehensive information boxes in families and only one power jack at the first information point.
The extension power strip does not need to be additionally increased, equipment investment is saved, and the three-way DC12 output is adopted for output, so that the equipment power supply connection is reliable, the reliability of power supply of the household terminal equipment is provided, and the maintenance cost of household networking equipment is reduced.
The power distribution module 30 is divided into three paths of DC12V output, so that the power distribution module is small in design volume and attractive in inserting and placing, and each path of output power can be dynamically distributed according to the actual power consumption, so that the power consumption utilization rate is improved.
In summary, the invention has the following beneficial effects: by changing one path of direct current output into three paths of direct current output, the power adapter only needs one power jack, so that the investment of equipment is saved, the power supply connection of the equipment is reliable, and the maintenance cost of household networking equipment is reduced.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (4)
1. A home network terminal apparatus power adaptation system, comprising: the power supply, the main circuit, the control circuit and the power distribution module;
the power supply is used for connecting with the mains supply;
the main circuit is connected with the power supply and is used for limiting the impact current input instantly when the power supply is switched on, rectifying and filtering and providing a direct current power supply according to the load requirement;
the control circuit is connected with the main circuit and used for stabilizing output and protecting the circuit according to the real-time condition of the circuit;
the power supply distribution module is connected with the main circuit and is used for distributing one path of direct current output into at least three paths of direct current output, and each path of output power is dynamically distributed according to actual use power consumption;
the main circuit comprises a rectifying and filtering circuit, an alternating current generating and detecting circuit and a direct current output circuit which are connected in sequence; the alternating current power supply obtains direct current voltage through a rectifying and filtering circuit, one path of the voltage is added to the control circuit through a transformer (T1), and the other path of the voltage is reduced to obtain starting voltage for supplying power to the power distribution module;
the rectifying and filtering circuit comprises a rectifying bridge (B1) for converting alternating current into direct current, a fourth resistor (R4) for overload protection and a first capacitor (C1) for filtering, wherein one end of the fourth resistor (R4) is connected to the rectifying bridge (B1), the other end of the fourth resistor is connected to the alternating current generating and detecting circuit (12), and one end of the first capacitor (C1) is connected to the rectifying bridge (B1) while the other end of the fourth resistor is grounded;
the alternating current generating and detecting circuit (12) comprises a third capacitor (C3) connected to the rectifier bridge (B1) and a fifth resistor (R5) connected with the third capacitor (C3), one end of the third capacitor (C3) is connected with one end of a fourth resistor (R4), and the other end of the third capacitor is connected with one end of an input end of the transformer (T1) through the fifth resistor (R5);
the alternating current generating and detecting circuit (12) further comprises a transformer (T1), a second capacitor (C2) and a third resistor (R3) connected in parallel with the second capacitor (C2), wherein one end of the second capacitor (C2) is connected with the first diode (D1) after being connected with the third resistor (R3) in parallel, the other end of the second capacitor is connected with one end of the input end of the transformer (T1), and the other input end of the transformer (T1) is connected with the other end of the first diode (D1);
the direct current output circuit (13) comprises a second diode (D2) and a third diode (D3) which are respectively connected with the output end of the transformer (T1), one end of the second diode (D2) is connected with one output end of the transformer (T1), and the other end of the second diode is connected to the power distribution module (30); one end of the third diode (D3) is connected with the other output end of the transformer (T1), and the other end of the third diode is connected to the power distribution module (30); the second diode (D2) and the third diode (D3) transmit the rectified direct current to the power distribution module (30);
the power distribution module divides one path of direct current output into three paths of direct current output, a fourth capacitor (C4) is connected to the power distribution module (30), and the other end of the fourth capacitor (C4) is connected to the common grounding end of the transformer (T1);
the control circuit (20) comprises a switching tube (Q1), wherein a base electrode of the switching tube (Q1) is connected with one end of a fourth resistor (R4), an emitting electrode of the switching tube (Q1) is grounded through the first resistor (R1), and a collecting electrode (C) of the switching tube (Q1) is connected with one end of a first diode (D1).
2. The power adapting system of home network terminal equipment according to claim 1, wherein each output of the power distribution module is set to automatically adapt to an actual output voltage of 5-12V required to be output by the load; the power distribution module can detect the voltage or current required to be output by the load first and automatically adjust each path of output; the power distribution module is internally provided with a self-detection circuit for detecting the required output voltage or current of the load, each path of output is automatically regulated, and each path of output can be automatically adapted to the actual output voltage of 5-12V required by the load.
3. A power adapter comprising an adapter body, characterized by further comprising: a home network terminal apparatus power adapting system according to any one of claims 1-2, wherein the power supply, the main circuit, and the control circuit of the home network terminal apparatus power adapting system are provided in the adapter body, the adapter body is connected to the power distribution module by a connection line, and the power supply is provided with a plug for connecting to a commercial power.
4. A power adapter according to claim 3, wherein the power distribution module is externally connected with at least three paths of direct current output plugs, a self-detection circuit is arranged in the power distribution module and used for detecting the required output voltage or current of the load, each path of output is automatically regulated, and each path of output can be automatically adapted to the actual output voltage of 5-12V required by the load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711398102.3A CN107968574B (en) | 2017-12-21 | 2017-12-21 | Power adapter system and power adapter for home network terminal equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711398102.3A CN107968574B (en) | 2017-12-21 | 2017-12-21 | Power adapter system and power adapter for home network terminal equipment |
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| CN107968574A CN107968574A (en) | 2018-04-27 |
| CN107968574B true CN107968574B (en) | 2023-08-29 |
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