CN108282004A - A kind of power circuit of phone charger - Google Patents
A kind of power circuit of phone charger Download PDFInfo
- Publication number
- CN108282004A CN108282004A CN201810112267.8A CN201810112267A CN108282004A CN 108282004 A CN108282004 A CN 108282004A CN 201810112267 A CN201810112267 A CN 201810112267A CN 108282004 A CN108282004 A CN 108282004A
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- CN
- China
- Prior art keywords
- resistance
- capacitance
- power circuit
- voltage
- phone charger
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- 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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of power circuit of phone charger, including resistance R1, R2, R3, R4, R5, R6, R7, R8, capacitance C1, C2, C3, diode D1, D2, voltage-stabiliser tube ZD1, transformer T1, inductance L1, transistor VT1, metal-oxide-semiconductor Q1, three-terminal voltage-stabilizing source U1, optocoupler U2.Circuit construction of electric power of the present invention is simple, at low cost, is not required to oscillating circuit, without straight-through phenomenon；It is operated in critical excitation, self-oscillation working method is taken to realize peak value comparison method；Circuit element is all made of discrete element, and strong antijamming capability is stable and reliable in work, and voltage up-down range is wide；Frequency control can obtain efficient and reliable work.
Description
Technical field
The present invention relates to power circuit technical fields, and in particular to a kind of power circuit of phone charger.
Background technology
Phone charger is also known as mobile power, is the controls such as to add necessary constant current, pressure limiting by a stabilized power source, prescribe a time limit
Circuit processed is constituted, and the equipment for mainly providing energy for electrical storage device is widely used in mobile phone, camera, number in sphere of life
Etc. common electric appliance.
Existing phone charger power supply generally uses PWM to control, and not only circuit structure is complicated, but also cost is higher, work(
The shutdown of opening of rate pipe needs to control using the PWM of special integrated chip, is susceptible to straight-through phenomenon, circuit is operated in interrupted work
Make state poor anti jamming capability, voltage up-down range is relatively narrow.
Invention content
(1) the technical issues of solving
The present invention is directed to the defect problem of above-mentioned phone charger power supply, provides a kind of power supply electricity of phone charger
Road, power circuit use self-excited oscillation type circuit, have it is simple in structure, at low cost, can be obtained by using a small number of resolution elements
The voltage output performance that special chip could be realized is needed, efficient and reliable work can be obtained by frequency control.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs：
A kind of power circuit of phone charger, including resistance R1, R2, R3, R4, R5, R6, R7, R8, capacitance C1, C2,
C3, diode D1, D2, voltage-stabiliser tube ZD1, transformer T1, inductance L1, transistor VT1, metal-oxide-semiconductor Q1, three-terminal voltage-stabilizing source U1, optocoupler
U2；Input voltage Ui is connected with the one end resistance R1, the one end transformer T1 primary side winding Np, the resistance R1 other ends and voltage-stabiliser tube ZD1
Cathode, metal-oxide-semiconductor Q1 grids, transistor VT1 collectors are connected, voltage-stabiliser tube ZD1 plus earths, metal-oxide-semiconductor Q1 drain electrodes and transformer primary
The side winding Np other ends are connected, and metal-oxide-semiconductor Q1 source electrodes are connected with the one end resistance R2, R3 respectively, the resistance R2 other ends and transistor VT1
Base stage is connected, transistor VT1 emitters ground connection, resistance R3 other ends ground connection；The one end transformer secondary winding Ns is grounded, transformer
The vice-side winding Ns other ends are connected with diode D1 anodes, resistance R4, the one end resistance R5, diode D1 cathodes and capacitance C1, electricity
To feel the one end L1 to be connected, capacitance C1 other ends ground connection, the inductance L1 other ends are connected with the one end capacitance C2, capacitance C2 other ends ground connection,
Capacitance C2 both end voltages are output voltage Vo；The resistance R4 other ends are connected with 1 foot of the one end resistance R7, optocoupler U2, and resistance R7 is another
One end is connected with 3 feet of 2 feet of optocoupler U2, three-terminal voltage-stabilizing source U1,1 foot, the resistance of the resistance R5 other ends and three-terminal voltage-stabilizing source U1
The one end R6 is connected, and the resistance R6 other ends are connected and are grounded with 2 feet of three-terminal voltage-stabilizing source U1, and 3 feet of optocoupler U2 are with transistor VT1's
Base stage is connected, and 4 feet of optocoupler U2 are connected with resistance R8, the one end capacitance C3, capacitance C3 other ends ground connection, the resistance R8 other ends and two
Pole pipe D2 cathodes are connected, and diode D2 anodes are connected with the one end transformer T1 auxiliary winding Nf, and transformer T1 auxiliary windings Nf is another
One end is grounded.
An embodiment according to the present invention, the three-terminal voltage-stabilizing source are TL431.
An embodiment according to the present invention, the optocoupler U2 are optocoupler PS2561.
An embodiment according to the present invention, the transistor VT1 are NPN triode.
An embodiment according to the present invention, the NPN triode are 9013.
An embodiment according to the present invention, the both ends the resistance R2 are parallel with capacitance C7.
An embodiment according to the present invention, described one end primary side winding Np transformer T1 and resistance R9, the one end capacitance C4 phase
Even, resistance R9, the capacitance C4 other ends are connected with diode D3 cathodes respectively, diode D3 anodes and transformer T1 primary side windings Np
The other end is connected.
The anode of an embodiment according to the present invention, the diode D2 is connected with voltage-stabiliser tube ZD2 cathodes, voltage-stabiliser tube ZD2
Anode is connected with the one end resistance R12, and the resistance R12 other ends are connected with transistor VT1 base stages.
An embodiment according to the present invention, the diode D2 anodes are connected with the one end resistance R10, the resistance R10 other ends
It is connected with the one end capacitance C5, the capacitance C5 other ends are connected with metal-oxide-semiconductor Q1 grids.
An embodiment according to the present invention, be connected in parallel on after thering is resistance R11 to connect with capacitance C6 1 foot of three-terminal voltage-stabilizing source U1 with
Between 3 feet.
(3) advantageous effect
Beneficial effects of the present invention：A kind of power circuit of phone charger, it is simple in structure, it is at low cost, it is not required to oscillation electricity
Road, without straight-through phenomenon；It is operated in critical excitation, self-oscillation working method is taken to realize peak value comparison method；Circuit
Element is all made of discrete element, and strong antijamming capability is stable and reliable in work, and voltage up-down range is wide；Frequency control can
It efficiently and is reliably worked with obtaining.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is power circuit principle figure of the present invention.
Reference sign：
Resistance R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, capacitance C1, C2, C3, C4, C5, C6, C7,
Diode D1, D2, D3, voltage-stabiliser tube ZD1, ZD2, transformer T1, inductance L1, transistor VT1, metal-oxide-semiconductor Q1, three-terminal voltage-stabilizing source U1,
Optocoupler U2.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
In conjunction with Fig. 1, a kind of power circuit of phone charger, including resistance R1, R2, R3, R4, R5, R6, R7, R8, capacitance
C1, C2, C3, diode D1, D2, voltage-stabiliser tube ZD1, transformer T1, inductance L1, transistor VT1, metal-oxide-semiconductor Q1, three-terminal voltage-stabilizing source
U1, optocoupler U2.Input voltage Ui is connected with the one end resistance R1, the one end transformer T1 primary side winding Np, the resistance R1 other ends with it is steady
Pressure pipe ZD1 cathodes, metal-oxide-semiconductor Q1 grids, transistor VT1 collectors are connected, voltage-stabiliser tube ZD1 plus earths, metal-oxide-semiconductor Q1 drain electrodes and change
The depressor primary side winding Np other ends are connected, and metal-oxide-semiconductor Q1 source electrodes are connected with the one end resistance R2, R3 respectively, the resistance R2 other ends and crystalline substance
Body pipe VT1 base stages are connected, transistor VT1 emitters ground connection, resistance R3 other ends ground connection；Transformer secondary winding Ns mono- is terminated
Ground, the transformer secondary winding Ns other ends are connected with diode D1 anodes, resistance R4, the one end resistance R5, diode D1 cathodes with
Capacitance C1, the one end inductance L1 are connected, and capacitance C1 other ends ground connection, the inductance L1 other ends are connected with the one end capacitance C2, and capacitance C2 is another
One end is grounded, and capacitance C2 both end voltages are output voltage Vo；The resistance R4 other ends are connected with 1 foot of the one end resistance R7, optocoupler U2,
The resistance R7 other ends are connected with 3 feet of 2 feet of optocoupler U2, three-terminal voltage-stabilizing source U1, the resistance R5 other ends and the 1 of three-terminal voltage-stabilizing source U1
Foot, the one end resistance R6 are connected, and the resistance R6 other ends are connected and are grounded with 2 feet of three-terminal voltage-stabilizing source U1,3 feet and crystal of optocoupler U2
The base stage of pipe VT1 is connected, and 4 feet of optocoupler U2 are connected with resistance R8, the one end capacitance C3, capacitance C3 other ends ground connection, and resistance R8 is another
One end is connected with diode D2 cathodes, and diode D2 anodes are connected with the one end transformer T1 auxiliary winding Nf, transformer T1 auxiliary
The winding Nf other ends are grounded.
Three-terminal voltage-stabilizing source is TL431.Optocoupler U2 is optocoupler PS2561.Transistor VT1 is NPN triode, and NPN triode is
9013。
In order to accelerate opening for transistor VT1 to be turned off with metal-oxide-semiconductor Q1, it is parallel with capacitance C7 at the both ends resistance R2, accelerates electricity
Hold C7 and so that resistance R2 is short-circuit, accelerate transistor VT1 open and metal-oxide-semiconductor Q1 shutdowns, to improve power supply stability and can
By property.
After so that metal-oxide-semiconductor Q1 is turned off, the energy quick release of the storage on transformer T1 primary side windings Np is fallen, and increases
Discharge loop.The one end primary side winding Np transformer T1 is connected with resistance R9, the one end capacitance C4, resistance R9, the capacitance C4 other ends point
It is not connected with diode D3 cathodes, diode D3 anodes are connected with the transformer T1 primary side winding Np other ends.
In order to make quickening feedback smoothly realize that the grid of metal-oxide-semiconductor Q1 is capable of providing reliable driving voltage.Diode D2's
Anode is connected with voltage-stabiliser tube ZD2 cathodes, and voltage-stabiliser tube ZD2 anodes are connected with the one end resistance R12, the resistance R12 other ends and transistor
VT1 base stages are connected；Diode D2 anodes are connected with the one end resistance R10, and the resistance R10 other ends are connected with the one end capacitance C5, capacitance
The C5 other ends are connected with metal-oxide-semiconductor Q1 grids.
In order to make the backfeed loop of power circuit be operated in duopole, PI adjustings are increased, have resistance R11 to be gone here and there with capacitance C6
It is connected in parallel on after connection between 1 foot and 3 feet of three-terminal voltage-stabilizing source U1.
The power circuit of phone charger of the present invention, circuit structure are simple, it is only necessary to which a small number of resolution elements can be obtained by
The voltage output performance that special chip could be realized is needed, efficient and reliable work is obtained with by good design.Perhaps
Mostly it is well solved in power circuit of the present invention with related difficult (drive waveforms, transformer saturation etc.) is driven.By
It is always operate on total energy transfer mode, secondary side rectifier diode zero current passing, reverse recovery current and loss in power supply
The ring of very little, generation is much smaller relative to incomplete energy transmission pattern, therefore the high-frequency cacophony exported is also much smaller.
Power circuit of the present invention is a kind of PFM frequency control power supply, and voltage stabilizing controls process not instead of picture PWM mode,
There is regulator tube group to control the on/off of switching tube at level switch.Common PWM voltage stabilizings process no matter auto-excitation type or independent-excited, open
The on/off for closing pipe is always periodically carried out by its working frequency, and PWM systems are to control the width of each recurrent pulse.For
The voltage stabilizing process is set to have smooth characteristic, PWM systems to be operated in linear zone pulsewidth modulation pipe and can neither be saturated and can not end, because
This will not make a certain cycle pulse width be zero because it ends, and a certain cycle pulse width will not be made to reach because it ends
Blocking oscillator time constant circuit setting maximum width, be typically only its 50%.
In conclusion the embodiment of the present invention, the power circuit of phone charger is simple in structure, at low cost, is not required to oscillation electricity
Road, without straight-through phenomenon；It is operated in critical excitation, self-oscillation working method is taken to realize peak value comparison method；Circuit
Element is all made of discrete element, and strong antijamming capability is stable and reliable in work, and voltage up-down range is wide；Frequency control can
It efficiently and is reliably worked with obtaining.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these modification or
It replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of power circuit of phone charger, it is characterised in that：Including resistance R1, R2, R3, R4, R5, R6, R7, R8, electricity
Hold C1, C2, C3, diode D1, D2, voltage-stabiliser tube ZD1, transformer T1, inductance L1, transistor VT1, metal-oxide-semiconductor Q1, three-terminal voltage-stabilizing source
U1, optocoupler U2；Input voltage Ui is connected with the one end resistance R1, the one end transformer T1 primary side winding Np, the resistance R1 other ends with it is steady
Pressure pipe ZD1 cathodes, metal-oxide-semiconductor Q1 grids, transistor VT1 collectors are connected, voltage-stabiliser tube ZD1 plus earths, metal-oxide-semiconductor Q1 drain electrodes and change
The depressor primary side winding Np other ends are connected, and metal-oxide-semiconductor Q1 source electrodes are connected with the one end resistance R2, R3 respectively, the resistance R2 other ends and crystalline substance
Body pipe VT1 base stages are connected, transistor VT1 emitters ground connection, resistance R3 other ends ground connection；Transformer secondary winding Ns mono- is terminated
Ground, the transformer secondary winding Ns other ends are connected with diode D1 anodes, resistance R4, the one end resistance R5, diode D1 cathodes with
Capacitance C1, the one end inductance L1 are connected, and capacitance C1 other ends ground connection, the inductance L1 other ends are connected with the one end capacitance C2, and capacitance C2 is another
One end is grounded, and capacitance C2 both end voltages are output voltage Vo；The resistance R4 other ends are connected with 1 foot of the one end resistance R7, optocoupler U2,
The resistance R7 other ends are connected with 3 feet of 2 feet of optocoupler U2, three-terminal voltage-stabilizing source U1, the resistance R5 other ends and the 1 of three-terminal voltage-stabilizing source U1
Foot, the one end resistance R6 are connected, and the resistance R6 other ends are connected and are grounded with 2 feet of three-terminal voltage-stabilizing source U1,3 feet and crystal of optocoupler U2
The base stage of pipe VT1 is connected, and 4 feet of optocoupler U2 are connected with resistance R8, the one end capacitance C3, capacitance C3 other ends ground connection, and resistance R8 is another
One end is connected with diode D2 cathodes, and diode D2 anodes are connected with the one end transformer T1 auxiliary winding Nf, transformer T1 auxiliary
The winding Nf other ends are grounded.
2. a kind of power circuit of phone charger as described in claim 1, which is characterized in that the three-terminal voltage-stabilizing source is
TL431。
3. a kind of power circuit of phone charger as claimed in claim 2, which is characterized in that the optocoupler U2 is optocoupler
PS2561。
4. a kind of power circuit of phone charger as claimed in claim 3, which is characterized in that the transistor VT1 is NPN
Triode.
5. a kind of power circuit of phone charger as claimed in claim 4, which is characterized in that the NPN triode is
9013。
6. a kind of power circuit of phone charger as claimed in claim 5, which is characterized in that the both ends the resistance R2 are in parallel
There is capacitance C7.
7. a kind of power circuit of phone charger as described in claim 1, which is characterized in that the transformer T1 primary sides around
Group one end Np is connected with resistance R9, the one end capacitance C4, and resistance R9, the capacitance C4 other ends are connected with diode D3 cathodes respectively, and two
Pole pipe D3 anodes are connected with the transformer T1 primary side winding Np other ends.
8. a kind of power circuit of phone charger as described in claim 1, which is characterized in that the anode of the diode D2
It is connected with voltage-stabiliser tube ZD2 cathodes, voltage-stabiliser tube ZD2 anodes are connected with the one end resistance R12, the resistance R12 other ends and transistor VT1 bases
Extremely it is connected.
9. a kind of power circuit of phone charger as claimed in claim 8, which is characterized in that the diode D2 anodes with
The one end resistance R10 is connected, and the resistance R10 other ends are connected with the one end capacitance C5, and the capacitance C5 other ends are connected with metal-oxide-semiconductor Q1 grids.
10. a kind of power circuit of phone charger as described in claim 1, which is characterized in that have resistance R11 and capacitance C6
It is connected in parallel on after series connection between 1 foot and 3 feet of three-terminal voltage-stabilizing source U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810112267.8A CN108282004A (en) | 2018-02-05 | 2018-02-05 | A kind of power circuit of phone charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810112267.8A CN108282004A (en) | 2018-02-05 | 2018-02-05 | A kind of power circuit of phone charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108282004A true CN108282004A (en) | 2018-07-13 |
Family
ID=62807650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810112267.8A Pending CN108282004A (en) | 2018-02-05 | 2018-02-05 | A kind of power circuit of phone charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108282004A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109017641A (en) * | 2018-10-17 | 2018-12-18 | 山东鲁道尔汽车科技有限公司 | Caravan circuit system |
| CN110247814A (en) * | 2019-02-02 | 2019-09-17 | 国网浙江安吉县供电有限公司 | A kind of convenient handheld apparatus for power system network equipment debugging |
-
2018
- 2018-02-05 CN CN201810112267.8A patent/CN108282004A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109017641A (en) * | 2018-10-17 | 2018-12-18 | 山东鲁道尔汽车科技有限公司 | Caravan circuit system |
| CN109017641B (en) * | 2018-10-17 | 2023-08-29 | 山东驰航汽车科技有限公司 | Motor home circuit system |
| CN110247814A (en) * | 2019-02-02 | 2019-09-17 | 国网浙江安吉县供电有限公司 | A kind of convenient handheld apparatus for power system network equipment debugging |
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