CN206211631U - A kind of constant voltage charging circuit - Google Patents
A kind of constant voltage charging circuit Download PDFInfo
- Publication number
- CN206211631U CN206211631U CN201621266523.1U CN201621266523U CN206211631U CN 206211631 U CN206211631 U CN 206211631U CN 201621266523 U CN201621266523 U CN 201621266523U CN 206211631 U CN206211631 U CN 206211631U
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- Prior art keywords
- circuit
- constant voltage
- voltage charging
- secondary coil
- switch element
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- 238000010280 constant potential charging Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 239000004065 semiconductor Substances 0.000 claims description 18
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000007600 charging Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model proposes a kind of constant voltage charging circuit, including：Transformer, including primary coil and secondary coil for connecing output loading for connecing DC source, the earth terminal of primary coil passes sequentially through switch element, regulation resistance eutral grounding, mu balanced circuit, including a control end, the control end is connected with the control pin of switch element, break-make for controlling switch element and the size of current for flowing through；Load, including multiple USB interfaces in parallel；Feedback circuit, is connected with secondary coil, the voltage signal of detection secondary coil output, and voltage signal is fed back into mu balanced circuit.The utility model can realize constant pressure, constant current output, while the use number of USB need not be limited, circuit is simple, easy to use.
Description
Technical field
The utility model is related to charging circuit, more particularly to a kind of constant voltage charging circuit.
Background technology
With smart mobile phone, panel computer and portable power source etc. are widely used, and many mouthfuls of USB Power Adapters are in recent years
Using widely.In traditional power adaptor field, popular is the charging modes of constant voltage.In simple terms,
No matter what kind of the state for being battery is, cell voltage is low or height, and charger can be held with an invariable voltage
It is continuous to charge, regardless of equipment state, how much current all forced charges can be born.
This charging modes USB voltage requests substantially not good at managing, as long as can fill, the usability of circuit is poor, into
This height.
The content of the invention
The utility model proposes a kind of simple constant voltage charging circuit of circuit to solve prior art.
The utility model discloses a kind of constant voltage charging circuit, including：
Transformer, including for connecing the primary coil and secondary coil for connecing output loading of DC source, primary coil
Earth terminal pass sequentially through switch element, regulation resistance eutral grounding,
Mu balanced circuit, including a control end, the control end is connected with the control pin of switch element, for controlling switch
The break-make of element and the size of current for flowing through；
Load, including multiple USB interfaces in parallel；
Feedback circuit, is connected with secondary coil, the voltage signal of detection secondary coil output, and voltage signal is fed back to
Mu balanced circuit.
Further, the input of primary coil is connected with rectification circuit.
Preferably, primary coil is connected by filter circuit with rectification circuit.
It is highly preferred that rectification circuit is connected with EMC circuits.
Further, the feedback circuit includes illuminating circuit, and illuminating circuit is in parallel with load；The feedback circuit includes
One processor, processor includes a feedback end and described control end, and feedback end is connected with light receiving circuit, and light receiving circuit connects
The optical signal of optical circuit is received and dispatched, and generates a current signal to feedback end, processor leads to according to the current signal for receiving feedback
Cross the potential of the control pin of control end controlling switch element.
Further, switch element is metal-oxide-semiconductor.
Further, transformer also includes secondary secondary coil, and secondary secondary coil is powered to processor.
Further, also including current regulating circuit, current regulating circuit includes being arranged on secondary coil output end and bearing
Middle metal-oxide-semiconductor between load and control IC, controls IC chip for model mp6902,2 test sides of control IC respectively with
The D poles of middle metal-oxide-semiconductor and S poles connect, and control a control end of IC to be connected with the G poles of middle metal-oxide-semiconductor.
Preferably, middle metal-oxide-semiconductor is parallel with median filter circuit.
The effect that the utility model patent is obtained：Constant pressure, constant current output can be realized, while the use of USB need not be limited
Number, circuit is simple, easy to use.
Brief description of the drawings
Fig. 1 is according to a basic circuit diagram of the present utility model.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
Refer to Fig. 1, a kind of constant voltage charging circuit, including：
Transformer, including for connecing the primary coil and secondary coil for connecing output loading of DC source, primary coil
Earth terminal pass sequentially through switch element, regulation resistance eutral grounding,
Mu balanced circuit, including a control end, the control end is connected with the control pin of switch element, for controlling switch
The break-make of element and the size of current for flowing through；
Load, including multiple USB interfaces in parallel；
Feedback circuit, is connected with secondary coil, the voltage signal of detection secondary coil output, and voltage signal is fed back to
Mu balanced circuit.
In the technical program, main break-make and size of current by mu balanced circuit control primary coil, break-make can make
The electric current of primary coil must be flowed through for square wave, corresponding square wave current can be produced in secondary coil；Secondly, opened by control
The size of current of element is closed, and then plays the voltage of control primary coil, the secondary coil fed back according to feedback circuit exports electricity
Pressure signal, and then the voltage of primary coil is controlled, the voltage for reaching secondary coil output is constant pressure.It is primary in specific setting
Coil can connect civil power by rectification circuit, it is also possible to directly connect the dc sources such as battery, rechargeable battery.
Further, the input of primary coil is connected with rectification circuit.
Preferably, primary coil is connected by filter circuit with rectification circuit.
In use, general civil power is used as power supply, therefore is designed with rectification circuit, in order that power good is obtained,
Therefore it is provided with filter circuit；For filtering the clutter in electric current.
It is highly preferred that rectification circuit is connected with EMC circuits.
Further, the feedback circuit includes illuminating circuit, and illuminating circuit is in parallel with load；The feedback circuit includes
One processor, processor includes a feedback end and described control end, and feedback end is connected with light receiving circuit, and light receiving circuit connects
The optical signal of optical circuit is received and dispatched, and generates a current signal to feedback end, processor leads to according to the current signal for receiving feedback
Cross the potential of the control pin of control end controlling switch element.
Illuminating circuit can use prior art, the optical signal of illuminating circuit pass proportional to the output voltage of secondary coil
System, and then the current signal relation proportional to output voltage of feedback is caused, after processor acquisition output voltage related data, control
Switch element processed improves or reduces the voltage of primary coil, and the output voltage for reaching guarantee secondary coil is constant pressure.Illuminating circuit,
Light receiving circuit can be available circuit.Light receiving circuit includes a photo detector, can change physics according to the power of light
Characteristic, such as resistance, capacitance.
Further, switch element is metal-oxide-semiconductor.
Certainly, switch element can also be triode.The G poles of metal-oxide-semiconductor are connected with a feedback end signal of processor.
Further, transformer also includes secondary secondary coil, and secondary secondary coil is powered to processor.
Processor can certainly be powered using other dc source, to reduce circuit, here using extra setting
One secondary secondary coil, the output end of secondary secondary coil is connected by diode with the power end of processor.
Further, also including current regulating circuit, current regulating circuit includes being arranged on secondary coil output end and bearing
Middle metal-oxide-semiconductor between load and control IC, controls IC chip for model mp6902,2 test sides of control IC respectively with
The D poles of middle metal-oxide-semiconductor and S poles connect, and control a control end of IC to be connected with the G poles of middle metal-oxide-semiconductor.
The both end voltage that control IC passes through metal-oxide-semiconductor in the middle of detection switch element, the size of current that acquisition is flowed through, and by control
The switching frequency of metal-oxide-semiconductor in the middle of switch element processed, reaches and controls its average current size.Preferably, during middle metal-oxide-semiconductor is parallel with
Between filter circuit.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model
Protection domain within.
Claims (9)
1. a kind of constant voltage charging circuit, it is characterised in that：Including：
Transformer, including for connecing the primary coil and secondary coil for connecing output loading of DC source, primary coil connects
Ground terminal passes sequentially through switch element, regulation resistance eutral grounding,
Mu balanced circuit, including a control end, the control end is connected with the control pin of switch element, for controlling switch element
Break-make and the size of current that flows through；
Load, including multiple USB interfaces in parallel；
Feedback circuit, is connected with secondary coil, the voltage signal of detection secondary coil output, and voltage signal is fed back into voltage stabilizing
Circuit.
2. a kind of constant voltage charging circuit according to claim 1, it is characterised in that：The input of primary coil is connected with whole
Current circuit.
3. a kind of constant voltage charging circuit according to claim 2, it is characterised in that：Primary coil by filter circuit with it is whole
Current circuit is connected.
4. a kind of constant voltage charging circuit according to Claims 2 or 3, it is characterised in that：Rectification circuit is connected with EMC electricity
Road.
5. a kind of constant voltage charging circuit according to claim 1, it is characterised in that：The feedback circuit includes luminous electricity
Road, illuminating circuit is in parallel with load；The feedback circuit includes a processor, and processor includes a feedback end and described
Control end, feedback end is connected with light receiving circuit, and light receiving circuit receives the optical signal of illuminating circuit, and one current signal of generation is given
Feedback end, the current signal that processor feeds back according to reception, by the potential of the control pin of control end controlling switch element.
6. a kind of constant voltage charging circuit according to claim 1, it is characterised in that：Switch element is metal-oxide-semiconductor.
7. a kind of constant voltage charging circuit according to claim 1, it is characterised in that：Transformer also includes secondary secondary coil,
Secondary secondary coil is powered to processor.
8. a kind of constant voltage charging circuit according to claim 1, it is characterised in that：Also include current regulating circuit, electric current
Regulation circuit includes middle the metal-oxide-semiconductor being arranged between secondary coil output end and load and controls IC, controls the IC chip to be
Model mp6902, controls 2 test sides of IC to be connected with the D poles and S poles of middle metal-oxide-semiconductor respectively, a control of control IC
Hold and be connected with the G poles of middle metal-oxide-semiconductor.
9. a kind of constant voltage charging circuit according to claim 8, it is characterised in that：Middle metal-oxide-semiconductor is parallel with median filter
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621266523.1U CN206211631U (en) | 2016-11-24 | 2016-11-24 | A kind of constant voltage charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621266523.1U CN206211631U (en) | 2016-11-24 | 2016-11-24 | A kind of constant voltage charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206211631U true CN206211631U (en) | 2017-05-31 |
Family
ID=58747355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621266523.1U Active CN206211631U (en) | 2016-11-24 | 2016-11-24 | A kind of constant voltage charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206211631U (en) |
-
2016
- 2016-11-24 CN CN201621266523.1U patent/CN206211631U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190419 Address after: 528400 One of the 3rd Floors of Block B, 82 Yingfu Second Road, Port Town, Zhongshan City, Guangdong Province Patentee after: ZHONGSHAN XICHUANG ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 528400 Zhongxin Camphor Villa 51-03, Huashi Road, Zhongshan Port Town, Guangdong Province Patentee before: Liang Hanlin |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231208 Address after: No. 30-2 Minxin Street, Xiaolan Town, Zhongshan City, Guangdong Province, 528400 Patentee after: Zhongshan Aoshidun Electrical Appliances Co.,Ltd. Address before: 528400 One of the 3rd Floors of Block B, 82 Yingfu Second Road, Port Town, Zhongshan City, Guangdong Province Patentee before: ZHONGSHAN XICHUANG ELECTRONIC TECHNOLOGY Co.,Ltd. |