CN205265546U - Power adapter - Google Patents
Power adapter Download PDFInfo
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- CN205265546U CN205265546U CN201521027099.0U CN201521027099U CN205265546U CN 205265546 U CN205265546 U CN 205265546U CN 201521027099 U CN201521027099 U CN 201521027099U CN 205265546 U CN205265546 U CN 205265546U
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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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Abstract
The utility model relates to a power adapter, the purpose is in order to solve the current high problem of the rudimentary stand -by power consumption of power adapter conversion efficiency. The utility model provides a power adapter, including the AC input mouth, the preceding stage protection circuit that concatenates in proper order with the AC input mouth, EMI filter circuit, input rectifier circuit, RCD clamp circuit, the PWM circuit, a power conversion circuit, output Rectifier filter circuit and tributary output port, voltage current feedback modulated circuit and switch tube current control circuit with PWM circuit connection, voltage feedback circuit with power conversion circuit connection, voltage current feedback modulated circuit and switch tube current control circuit and voltage feedback circuit connection. The utility model is suitable for a household electrical appliances power adapter.
Description
Technical field
The utility model relates to power supply adaptor.
Background technology
Switching Power Supply has another name called power supply adaptor, and in a broad sense, every employing semiconductor power switch device, as switching tube, by the high frequency of switching tube being opened and being turn-offed control, becomes the device of another kind of electric energy form to be called switch converter a kind of electric energy Forms Transformation. Taking switch converter as chief component, control regulated output voltage with closed loop is automatic, and in circuit, add the power supply of link of protection to be called Switching Power Supply. Day by day universal along with mobile electronic product, power supply adaptor is by increasingly extensive application, as equipment such as Set Top Box, router, walkman, notebooks. But be subject to the restriction of current electronic devices and components self character and technical merit, when power supply adaptor exists work, starting current is large, and when standby, power consumption is high, the large shortcoming of audio-frequency noise when work, causes its overall performance poor. Meanwhile, the associated mechanisms that the whole world is promoting the ground such as European Union, California, USA to the concern of energy cost rise, environmental protection and energy sustainability releases one after another and reduces the specification of electronic device energy consumption. No matter alternating current input power supplying is freestanding or be integrated in electronic equipment, all can cause certain energy waste; First, the efficiency of power supply can not be 100%, and portion of energy is wasted in the time that power supply heavy load is worked; Secondly,, in the time that load is not used, the power supply that connects AC line can be with the form consumed energy of stand-by power consumption. In addition, increasingly strict to the requirement of power-efficient grade in recent years, meeting CECLever5 has become basic standard. The Energy Efficiency Standard DOELot6 especially of new proposal. In addition, only under full load, the old way of testing efficiency is eliminated. Current new standard has related to the average level of 25%, 50%, 75% and 100% these four points of nominal load. Similarly, the maximum stand-by power consumption that allows is also more and more restricted, and it is the acceptable limit value of low-power power adapter (power output≤49W) that European Union requires stand-by power consumption to be less than 0.3W at present, and the stand-by power consumption standard of new proposal is less than 0.1W especially. So no matter be the sustainable development that maintains the earth for energy-conserving and environment-protective, or in order to reach the standard of energy of various countries, the green power supply adapter that exploitation conversion efficiency is high, stand-by power consumption is low all tool is of great significance and market prospects.
Utility model content
The purpose of this utility model is in order to solve the high problem of the rudimentary stand-by power consumption of existing power supply adapter conversion efficiency.
For achieving the above object, the utility model provides a kind of power supply adaptor, comprises pcb board and is arranged on ac input end mouth, DC output end mouth prime holding circuit, EMI filter circuit, input rectification circuit, RCD clamp circuit, pwm circuit, power conversion circuit, voltage feedback circuit, switching tube current control circuit, feedback of voltage and current modulation circuit and the output rectifier and filter on pcb board;
Described ac input end mouth is connected with prime holding circuit, prime holding circuit is connected with EMI filter circuit, EMI filter circuit is connected with input rectification circuit, input rectification circuit is connected with RCD clamp circuit, RCD clamp circuit is connected with pwm circuit, pwm circuit respectively with feedback of voltage and current modulation circuit, switching tube current control circuit and power conversion circuit connect, power conversion circuit is connected with output rectifier and filter and voltage feedback circuit respectively, output rectifier and filter is connected with DC output end mouth, feedback of voltage and current modulation circuit is connected with switching tube current control circuit and voltage feedback circuit respectively.
Particularly; described prime holding circuit comprises plastic packaging protective tube, insurance resistance and piezo-resistance; described insurance resistance one end is connected with EMI filter circuit; the other end is connected with one end and the live wire of piezo-resistance; the other end of piezo-resistance is connected with one end of plastic packaging protective tube, and the other end of plastic packaging protective tube is connected with zero line.
Particularly, described output rectifier and filter comprises diode, resistance, the first electric capacity, the second electric capacity and the 3rd electric capacity, after described resistance and the first capacitances in series with diodes in parallel, the positive pole of diode is connected with power conversion circuit, the negative pole of diode is connected with the second electric capacity, the second electric capacity and the 3rd Capacitance parallel connection, the 3rd electric capacity is connected with DC output end mouth.
Preferably, also comprise adapter shell, described pcb board is arranged in adapter shell.
Particularly, described adapter shell is plastic casing.
The beneficial effects of the utility model are: by a kind of power supply adaptor that domestic electric appliance power supply is used of being convenient to is provided, comprise shell and be arranged at the PCB in this shell, limiting in shell, PCB is carried out to rational deployment design, power supply control chip and circuit parameter are carried out to Rational choice. Can reduce greatly the energy consumption of designed product, designed go out its average efficiency of power supply adaptor and stand-by power consumption all far below CECLever5 Energy Efficiency Standard.
Brief description of the drawings
Fig. 1 is the theory diagram of power supply adaptor of the present utility model.
Detailed description of the invention
The utility model is to solve the high problem of the existing power supply rudimentary stand-by power consumption of adapter conversion efficiency, a kind of power supply adaptor is provided, as shown in Figure 1, single out-put supply adapter of the present utility model comprises: prime holding circuit, realizes the protection to late-class circuit under thunderbolt, abnormal large voltage, abnormal large current conditions; EMI filter circuit, shields for electromagnetic interference to external world,, also shields for the electromagnetic interference that self is produced meanwhile; Input rectification circuit, for the AC rectification of input being become to the direct current of pulsation, meanwhile, smoothly this Rectified alternating current, makes it to become pure square wave current; RCD clamp circuit, for absorbing switch transformer leakage inductance spike; Pwm circuit, for the pulsewidth modulation of input voltage, this PWM power switch is realized by a triode; Power conversion circuit. This main circuit will lean on a switch transformer to realize step-down and power conversion, in order to the approximately 300V high pressure after elementary rectifying and wave-filtering is converted to the low pressure of 5.2VDC; Voltage feedback circuit, this scheme adopts former limit feedback, and sampled voltage is the voltage on feedback winding; Switching tube current control circuit. In order to the current signal that flows through switching tube is sampled; Feedback of voltage and current modulation circuit, regulates for the Kai Heguan to switching tube after integrated voltage and current feedback signal; Output rectifier and filter. Realize the fluctuating signal rectification after transformer pressure-reducing and be smoothed to the pure low-voltage 5.2VDC that terminal device needs.
Ac input end mouth is connected with prime holding circuit, prime holding circuit is connected with EMI filter circuit, EMI filter circuit is connected with input rectification circuit, input rectification circuit is connected with RCD clamp circuit, RCD clamp circuit is connected with pwm circuit, pwm circuit respectively with feedback of voltage and current modulation circuit, switching tube current control circuit and power conversion circuit connect, power conversion circuit is connected with output rectifier and filter and voltage feedback circuit respectively, output rectifier and filter is connected with DC output end mouth, feedback of voltage and current modulation circuit is connected with switching tube current control circuit and voltage feedback circuit respectively.
The pwm circuit of single out-put supply adapter of the present utility model is control chip C2174PX8 used, and the control model of C2174 is current source PWM. Chip is mainly selected module composition by CC control module, CV control module, line complementary modulus piece, transient state detection module, time block and PWM/PFM. When normal work, it is the hybrid switch pattern of PWM and PFM; and conventional chip mostly is PWM (pulsewidth modulation) switching mode while normally working; thereby the low-power consumption from chip in the time having solved its normal work with it; simultaneously; built-in chip type input low-voltage protection module, output overcurrent protection module, output over-voltage protection module etc., thereby improved stability and the reliability of system works.
The Π type filter circuit that single out-put supply adapter EMI filter circuit of the present utility model is mainly made up of a rectifier bridge stack and two electric capacity completes. Common mode inductance has the characteristic of two-way high impedance, can effectively suppress the electromagnetic interference that input is introduced.
The input rectification circuit of single out-put supply adapter of the present utility model is designed to whole rectifications that are made up of rectifier bridge stack.
Single out-put supply adapter RCD clamp circuit of the present utility model, is made up of resistance, electric capacity and diode. Carry out absorbing clamp in order to the peak voltage that transformer leakage inductance is produced. Realize the object of protection IC reliably working.
The pwm circuit of single out-put supply adapter of the present utility model is control chip C2174PX8 used.
The power conversion circuit of single out-put supply adapter of the present utility model mainly comprises a switch transformer. Convert rectification direct current out to client required voltage for realizing under PWM controls, simultaneously, when design switch transformer, use safety skeleton (being provided with primary edge and secondary side) but not the mode of secondary fly line, both can carry out isolation to high voltage and low-voltage, make it to meet safety standard, be also easy to produce simultaneously.
The voltage feedback circuit of single out-put supply adapter of the present utility model carries out dividing potential drop by the divider resistance of two series connection to the voltage on feedback winding, voltage on divider resistance is identified by PWM controller and is compared with inner reference voltage, obtains comparative voltage U1 after error amplifier.
The switching tube circuit control circuit of single out-put supply adapter of the present utility model is made up of three parallel resistances, flows through the electric current of switching tube for detection of primary winding.
Claims (5)
1. power supply adaptor, it is characterized in that, comprise pcb board and be arranged on ac input end mouth, DC output end mouth prime holding circuit, EMI filter circuit, input rectification circuit, RCD clamp circuit, pwm circuit, power conversion circuit, voltage feedback circuit, switching tube current control circuit, feedback of voltage and current modulation circuit and the output rectifier and filter on pcb board;
Described ac input end mouth is connected with prime holding circuit, prime holding circuit is connected with EMI filter circuit, EMI filter circuit is connected with input rectification circuit, input rectification circuit is connected with RCD clamp circuit, RCD clamp circuit is connected with pwm circuit, pwm circuit respectively with feedback of voltage and current modulation circuit, switching tube current control circuit and power conversion circuit connect, power conversion circuit is connected with output rectifier and filter and voltage feedback circuit respectively, output rectifier and filter is connected with DC output end mouth, feedback of voltage and current modulation circuit is connected with switching tube current control circuit and voltage feedback circuit respectively.
2. power supply adaptor as claimed in claim 1; it is characterized in that; described prime holding circuit comprises plastic packaging protective tube, insurance resistance and piezo-resistance; described insurance resistance one end is connected with EMI filter circuit; the other end is connected with one end and the live wire of piezo-resistance; the other end of piezo-resistance is connected with one end of plastic packaging protective tube, and the other end of plastic packaging protective tube is connected with zero line.
3. power supply adaptor as claimed in claim 1, it is characterized in that, described output rectifier and filter comprises diode, resistance, the first electric capacity, the second electric capacity and the 3rd electric capacity, after described resistance and the first capacitances in series with diodes in parallel, the positive pole of diode is connected with power conversion circuit, the negative pole of diode is connected with the second electric capacity, the second electric capacity and the 3rd Capacitance parallel connection, and the 3rd electric capacity is connected with DC output end mouth.
4. power supply adaptor as claimed in claim 1, is characterized in that, also comprises adapter shell, and described pcb board is arranged in adapter shell.
5. power supply adaptor as claimed in claim 1, is characterized in that, described adapter shell is plastic casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521027099.0U CN205265546U (en) | 2015-12-10 | 2015-12-10 | Power adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521027099.0U CN205265546U (en) | 2015-12-10 | 2015-12-10 | Power adapter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205265546U true CN205265546U (en) | 2016-05-25 |
Family
ID=56007049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521027099.0U Active CN205265546U (en) | 2015-12-10 | 2015-12-10 | Power adapter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205265546U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783099A (en) * | 2017-03-30 | 2017-05-31 | 深圳创维数字技术有限公司 | A kind of transformer and power supply adaptor |
| CN107968574A (en) * | 2017-12-21 | 2018-04-27 | 广东省广播电视网络股份有限公司 | A kind of home network terminal equipment power adaption system and power supply adaptor |
-
2015
- 2015-12-10 CN CN201521027099.0U patent/CN205265546U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783099A (en) * | 2017-03-30 | 2017-05-31 | 深圳创维数字技术有限公司 | A kind of transformer and power supply adaptor |
| CN107968574A (en) * | 2017-12-21 | 2018-04-27 | 广东省广播电视网络股份有限公司 | A kind of home network terminal equipment power adaption system and power supply adaptor |
| CN107968574B (en) * | 2017-12-21 | 2023-08-29 | 广东省广播电视网络股份有限公司 | Power adapter system and power adapter for home network terminal equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190718 Address after: 621000 Exit Processing Zone 201 Factory Building, 261 Feiyun Avenue East Section, Mianyang High-tech Zone, Sichuan Province Patentee after: Sichuan Hongrui Electrical Co., Ltd. Address before: County 622651 Sichuan city of Mianyang Province Hua Gai Zhen Luo Sheng Jie Sichuan Changhong Electronics Co., Ltd. Patentee before: SICHUAN CHANGHONG ELECTRONIC PARTS CO., LTD. |
|
| TR01 | Transfer of patent right |