CN110138039A - A kind of solar charging circuit and charger - Google Patents
A kind of solar charging circuit and charger Download PDFInfo
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- CN110138039A CN110138039A CN201910444677.7A CN201910444677A CN110138039A CN 110138039 A CN110138039 A CN 110138039A CN 201910444677 A CN201910444677 A CN 201910444677A CN 110138039 A CN110138039 A CN 110138039A
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Abstract
The present invention provides a kind of solar charging circuit and charger, is related to solar charging electro-technical field.A kind of solar charging circuit, is electrically connected with sun-generated electric power, comprising: filter circuit, voltage regulator circuit, voltage conversion circuit, indicator light circuit and USB interface；Filter circuit includes the first filter circuit and the second filter circuit in parallel, the input terminal of first filter circuit is electrically connected with sun-generated electric power, voltage regulator circuit is installed between the output end of the first filter circuit and the input terminal of the second filter circuit, the output end of second filter circuit is electrically connected with voltage conversion circuit, and indicator light circuit is connected in parallel between voltage conversion circuit and USB interface；Wherein, in voltage regulator circuit, the reference pole of source of stable pressure is connect with source of stable pressure input circuit, and the anode of source of stable pressure is connect with pressure difference adjustment circuit, and the cathode of source of stable pressure is connect with voltage-stabilizing output circuit.By being provided with pressure difference adjustment circuit in voltage regulator circuit, to avoid the case where spread of voltage causes charging equipment to damage when charging.
Description
Technical field
The present invention relates to solar charging electro-technical fields, in particular to a kind of solar charging circuit and charger.
Background technique
Currently, solar power generation is a kind of emerging renewable energy, special solar power plant is arrived greatly, it is small to hand
The charger baby of the charging of mobile devices such as machine, all utilizes solar power generation incisively and vividly now.
In the prior art, solar charging device, which is substantially, is directly connected to out electric equipment, is then prevented using diode
Electricity passes back on the solar panel of solar energy.
But using the prior art, (such as: rainy days) when sunlight is unstable, it is easy to produce biggish voltage difference, is caused
The charging voltage of solar charging device is unstable, in turn results in the damage of solar charging device component, more serious meeting
Lead to the damage of solar charging device.
Summary of the invention
It is an object of the present invention in view of the deficiency of the prior art, a kind of solar charging circuit is provided and is filled
Electric appliance can be realized low dropout voltage regulator, so that the charging voltage of solar charging device is stablized.
To achieve the above object, The technical solution adopted by the invention is as follows:
In a first aspect, the embodiment of the invention provides a kind of solar charging circuits, comprising: filter circuit, voltage regulator circuit,
Voltage conversion circuit, indicator light circuit and USB interface；
The filter circuit includes in parallel the first filter circuit and the second filter circuit, first filter circuit it is defeated
Enter end to be electrically connected with the sun-generated electric power, the voltage regulator circuit is installed in the output end of first filter circuit and described the
Between the input terminal of two filter circuits, the output end of second filter circuit is electrically connected with the voltage conversion circuit, described
Indicator light circuit is connected in parallel between the voltage conversion circuit and the USB interface；
Wherein, the voltage regulator circuit includes source of stable pressure, source of stable pressure input circuit, pressure stabilizing source follower circuit and differential pressure adjustment electricity
Road, the reference pole of the source of stable pressure are connect with the source of stable pressure input circuit, and the anode of the source of stable pressure and the pressure difference adjust
Circuit connection, the cathode of the source of stable pressure are connect with the voltage-stabilizing output circuit.
Further, pressure difference adjustment circuit includes the first triode and first resistor, and voltage regulator circuit further includes shunt circuit,
Shunt circuit includes the second triode and second resistance, wherein the base stage of the first triode is connect with first resistor, the one or three pole
The emitter of pipe is connect with the emitter of the second triode, and the collector of the second triode is connect with first resistor, the one or three pole
The base stage of pipe is connect with first resistor, and the collector of the second triode is connect with 3rd resistor.
Further, the source of stable pressure is TL431.
Further, first triode is FZT788B, and second triode is 2N3906.
Further, first filter circuit includes the first electrolytic capacitor and first capacitor, second filter circuit
Including the second electrolytic capacitor and the second capacitor.
Further, the voltage conversion circuit includes: voltage conversion chip, the 4th resistance and third capacitor, the electricity
First pin of pressure conversion chip connects the 4th resistance and third capacitor respectively, the other end of the 4th resistance also with the second filter circuit
The second electrolytic capacitor and USB interface positive pole connection, the second electrolytic capacitor of third capacitor and the second filter circuit
The other end connection, the second pin and the third capacitor of conversion chip connect the same of the second electrolytic capacitor of the second filter circuit
End, and connect with the power cathode of USB interface, the third pin and the 4th pin of conversion chip connect the number of USB interface respectively
According to anode and data cathode.
Further, the voltage conversion chip is GPM2513.
Further, the indicator light in the indicator light circuit is three-primary color LED lamp.
Second aspect, the present invention also provides a kind of solar charger, including sun-generated electric power and such as first aspect institute
The solar charging circuit stated.
Further, the solar panel of the sun-generated electric power is polysilicon.
The beneficial effects of the present invention are:
The present invention provides a kind of solar charging circuit and charger, by being that solar charging circuit is provided with pressure stabilizing electricity
Road, and pressure difference adjustment circuit is provided in voltage regulator circuit, voltage regulator circuit can also adjust voltage while burning voltage
It is whole so that the pressure difference during pressure stabilizing reduces, thereby may be ensured that the charging voltage of solar charging device is stablized, avoid because
The case where spread of voltage causes charging equipment to damage when to charge.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the module diagram of solar charging circuit provided in an embodiment of the present invention；
Fig. 2 is the module diagram of voltage regulator circuit in solar charging circuit provided in an embodiment of the present invention；
Fig. 3 is the module diagram of indicator light in solar charging circuit provided in an embodiment of the present invention；
Fig. 4 is a kind of solar charging circuit schematic diagram provided in an embodiment of the present invention.
Icon: 100- sun-generated electric power；200- filter circuit；The first filter circuit of 210-；The second filter circuit of 220-；
300- voltage regulator circuit；310- pressure difference adjustment circuit；320- bleeder circuit；330- source of stable pressure；340- shunt circuit；400- voltage turns
Change circuit；500- indicator light circuit；510- indicator light；520-USB interface；The RGB of 530-LED controls chip；The first electricity of C18-
Solve capacitor；C16- first capacitor；R36- 3rd resistor；The 7th resistance of R39-；The 6th resistance of R38-；The 5th resistance of R33-；R34-
Second resistance；R35- first resistor；D3- source of stable pressure；The second triode of Q8-；The first triode of Q5-；The second capacitor of C23-；C17-
Second electrolytic capacitor；The 4th resistance of R25-；C24- third capacitor；U9- voltage conversion chip；LED1-LED indicator light；R40-
Eight resistance.
Specific embodiment
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.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In addition, the terms such as term "horizontal", "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly
Low dip.It is not to indicate that the structure has been had to if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It is complete horizontal, but can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
As shown in Figure 1, the present invention provides a kind of solar charging circuit, it is electrically connected with sun-generated electric power 100, comprising: filter
Wave circuit 200, voltage regulator circuit 300, voltage conversion circuit 400, indicator light circuit 500 and USB interface 520；Filter circuit 200 wraps
Include the first filter circuit 210 and the second filter circuit 220 in parallel, the input terminal and sun-generated electric power of the first filter circuit 210
100 electrical connection, voltage regulator circuit 300 be installed in the first filter circuit 210 output end and the second filter circuit 220 input terminal it
Between, the output end of second filter circuit 220 is electrically connected with voltage conversion circuit 400, and indicator light circuit 500 is connected in parallel on voltage
Between conversion circuit 400 and the USB interface 520；Wherein, voltage regulator circuit 300 inputs electricity including source of stable pressure 330, source of stable pressure 330
Road, 330 output circuit of source of stable pressure and pressure difference adjustment circuit 310, the reference pole of source of stable pressure 330 and the source of stable pressure 330 input electricity
Road connection, the anode of source of stable pressure 330 are connect with pressure difference adjustment circuit 310, and the cathode and voltage-stabilizing output circuit of source of stable pressure 330 connect
It connects.
Specifically, the input terminal of the first filter circuit 210 in the solar charging circuit is electrically connected with sun-generated electric power 100
It connects, which can export the voltage of 6V-9V, which can be very big using a capacity
The high-frequency filter circuit that electrolytic capacitor and the capacitor of a capacity very little compose in parallel, for the high-frequency signal in filtering circuit,
The output end of first filter circuit 210 is electrically connected with the input of voltage regulator circuit 300, and voltage regulator circuit 300 can be by sun-generated electric power
The voltage stabilization of the 6V-9V of 100 outputs is in 5.2V, and the output end of voltage regulator circuit 300 is in the input terminal electricity of the second filter circuit 220
Connection, the second filter circuit 220 is identical as the first filter circuit 210, has been all made of the big electrolytic capacitor knot in parallel with small capacitances
Structure, for being filtered again to the voltage after 300 pressure stabilizing of voltage regulator circuit, the output end and voltage of the second filter circuit 220
The input terminal of conversion circuit 400 is electrically connected, and voltage conversion circuit 400 can for being converted to the voltage in solar charging circuit
For the voltage of charging equipment, the output end of voltage conversion circuit 400 and the input terminal and indicator light circuit of indicator light circuit 500
500 input terminal electrical connection, indicator light circuit 500 are used to indicate the working condition of current solar charging circuit.
Specifically, in solar charging circuit, electric energy that sun-generated electric power 100 converts solar energy into it is not steady enough
It is fixed, it usually needs by that could be charging equipment charging after the processing such as filtering, pressure stabilizing.Wherein, filter circuit 200 is used to incite somebody to action
Reduce the alternating component in the DC voltage of pulsation as far as possible, retain its flip-flop, makes the reduction of output voltage ripple coefficient, wave
Deformation obtain it is smoother, to guarantee charging equipment not by the circuit damage of alternating component；Voltage regulator circuit 300 is for will too
The unstable voltage that sun-generated electric power 100 is converted in positive energy circuit is fixed in a stable value, to be used to guarantee wait fill
Electric equipment charges normal, and will not damage because of unstable voltage；Conversion circuit is used for 300 pressure stabilizing of voltage regulator circuit
Circuit later is converted, and being converted into can be for the voltage of the charging of mobile devices such as mobile phone, tablet computer；Indicator light circuit
500 for showing whether current charging circuit is powered, and when indicator light 510 lights, then solar charging circuit is in logical
Electric working condition, then solar charging circuit is power-off closed state when extinguishing, with it is user-friendly when go and find out what's going on；USB
Interface 520 is used to that charging interface can be provided by the charging equipment that USB interface 520 charges to be common.
Wherein, above-mentioned filter circuit 200 includes the first filter circuit 210 and the second filter circuit 220, first filtered electrical
Road 210 and second filter circuit 220 are filtered before and after voltage regulator circuit 300 twice respectively, and the first filter circuit 210 is first
It is filtered the equal components of the source of stable pressure 330 that can protect in voltage regulator circuit 300, after voltage regulator circuit 300, the second filtering
Circuit 220 carries out second and filters, and is to be filtered again so that the voltage waveform in solar charging circuit is more smooth, more
It is suitably for charging equipment power supply.
The present invention provides a kind of solar charging circuit and device, by being that solar charging circuit is provided with pressure stabilizing electricity
Road, and pressure difference adjustment circuit is provided in voltage regulator circuit, voltage regulator circuit can also adjust voltage while burning voltage
It is whole so that the pressure difference during pressure stabilizing reduces, thereby may be ensured that the charging voltage of solar charging device is stablized, avoid because
The case where spread of voltage causes charging equipment to damage when to charge.
Further, pressure difference adjustment circuit 310 includes the first triode and first resistor, and voltage regulator circuit further includes shunting electricity
Road, shunt circuit include the second triode and second resistance, wherein and the base stage of the first triode is connect with first resistor, and first
The emitter of triode is connect with the emitter of the second triode, and the collector of the second triode is connect with first resistor, and one or three
The base stage of pole pipe is connect with first resistor, and the collector of the first triode is connect with 3rd resistor.
Specifically, as shown in Fig. 2, when input voltage is in ascent stage, electric current passes through first from sun-generated electric power 100
Then filter circuit 210 reaches the 5th resistance, the voltage that the 5th resistance generates at this time is lower than the conducting voltage of the second triode,
Second triode is in off state, so referring to pole without Voltage Feedback to source of stable pressure 330, source of stable pressure 330 only has minimum yin
Electrode current, the first transistor emitter and base stage generate the amplified generation of base current through first resistor and produce collector current stream
To output end, output end voltage rises.After output voltage rises, and reach 2.5V or more after dividing, 330 yin of source of stable pressure
Electrode current increases, and voltage on the 5th resistance is made to increase to the collector that the second triode is generated into magnifying state, the second triode
For current distributing a part to the base current of the first triode, reducing the first transistor base electric current makes the first transistor collector
Current reduction, then at this time output voltage to decline.Pressure difference adjustment circuit 310, shunt circuit 340 and source of stable pressure 330 are constantly in
In the dynamic equilibrium of above two negative-feedback, guarantee output voltage stabilization in 5.2V, in addition, the first triode is minimum living and pressure drop
Triode, therefore pressure drop is less than 0.2V under the first triode limit on state, so that entire route has within 0.2V
Low voltage difference performance.
Further, source of stable pressure 330 is TL431.
It should be noted that using source of stable pressure 330TL431 in voltage regulator circuit 300 is because TL431 is that controllable accurate is steady
Potential source 330, two resistance of its output voltage can be arbitrarily arranged to from Vref (2.5V) to any within the scope of 36V
Value, and the output voltage of general zener diode can only be fixed in a value.In the present embodiment, 3rd resistor and parallel connection
The 6th resistance, the 7th resistance be to be used to adjust the output voltage of source of stable pressure 330, wherein adjustment 330 output voltage of source of stable pressure
Formula is as follows:
Wherein, R1For 3rd resistor, R2For the 6th resistance and the 7th resistance in parallel.
Further, the first triode is FZT788B, and the second triode is 2N3906.
Specifically, the first triode and the second triode are all PNP type triode, wherein FZT788B is with high-gain
High-power Semiconductor Triode, and have low-down saturation voltage drop and equivalent resistance because when solar charging circuit works,
It needs the first triode to be always maintained on state just to work normally with can guarantee solar charging circuit, therefore uses electric conduction
Stream requires relatively low FZT788B.2N3906 is low-power transistor, and conducting is higher than FZT788B, only works as 2N3906
Emitter voltage be greater than base voltage 0.7V or more when could be connected, this be in order to make in voltage regulator circuit 300 keep one
The state of dynamic equilibrium, i.e., when the electric current of the first triode is larger, the second triode is also switched on, and can share the first triode
In electric current, finally make the reference pole of source of stable pressure 330TL431 input current be definite value.
Further, the first filter circuit 210 includes the first electrolytic capacitor and the second capacitor, the second filter circuit 220 packet
Include the second electrolytic capacitor and the second capacitor.
Specifically, electrolytic capacitor capacitance is 220 μ F in the first filter circuit 210, and capacitor is 0.1 μ F, the second filter circuit
Electrolytic capacitor capacitance is 470 μ F in 220, and capacitor is 0.1 μ F, and therefore, the first filter circuit 210 and the second filter circuit 220 are
For high-frequency filter circuit.In solar charging electric line, it is only necessary to which low frequency signal does not need high frequency letter to carry out processing to circuit
Number, thus the present embodiment use a capacity it is very big electrolytic capacitor it is in parallel with the capacitor of a capacity very little as first
Filter circuit 210 and the second filter circuit 220 are filtered the high-frequency signal in solar charging circuit.
Further, voltage conversion circuit 400 includes: voltage conversion chip, the 4th resistance and third capacitor, voltage conversion
First pin of chip connects the 4th resistance and third capacitor respectively, the other end of the 4th resistance also with the second filter circuit 220
Second electrolysis of the connection of the positive pole of the second electrolytic capacitor and USB interface 520, third capacitor and the second filter circuit 220
The other end of capacitor connects, and the second pin and third capacitor of conversion chip connect the second electrolytic capacitor of the second filter circuit 220
The same end, and connect with the power cathode of USB interface 520, the third pin and the 4th pin of conversion chip meet USB respectively
The data anode and data cathode of interface 520.
Specifically, rechargeable portable equipment needs an external power supply to charge the battery.Because there is available 5V power supply,
Selection USB port can be more convenient to charge.To ensure that master-slave equipment can meet the requirement of power management, therefore need using logical
Standard.Since universal, 500mA charging current or USB3.0 specified in USB2.0 specification has been obtained in USB charging
The charging current of 900mA specified in specification is no longer satisfied most such as mobile phone, tablet computer, personal video players
Charging requirement, these equipment have more high standard charging current.It can be passed through by 400 master-slave equipment of voltage conversion circuit
The mode of Handshake Protocol, to identify other side, to where can be drawn from main equipment to being more than with same root USB charging cable from equipment
The electric current of 500mA (definition of UBS2.0 specification) or 900mA (definition of USB3.0 specification).
Further, voltage conversion chip GPM2513.
Specifically, GPM2513 is a USB dedicated charger controller.It can be applicable to onboard charger, with the end USB
The AC-DC power supply adaptor and other USB charging equipments of mouth.GPM2513 has the characteristic detected automatically, can pass through detection
The variation of voltage on the D+ and D- of USB can in time load correct discernible signal on DP and DM, connect therewith to realize
The quick-charge function of the compatible Portable device connect.The portable equipment of support includes: the tablet computer of smart phone, 5V charging
And personal media player.
Further, the indicator light 510 in indicator light circuit 500 is three-primary color LED lamp.
Specifically, three-primary color LED lamp is connected to the power positive cathode of USB interface 520 respectively, then when charging circuit works,
Three-primary color LED lamp can be bright, is used to indicate the state of solar charging circuit.
Optionally, as shown in figure 3, can also be controlled in the RGB that the data positive and negative anodes pin of USB interface 520 connects a LED
Coremaking piece 530 is used to obtain the charging situation of current charging equipment, and the RGB control chip 530 of LED is further according to charging situation pair
The color of three-primary color LED lamp is controlled, and three-primary color LED lamp is made to show difference under the different charging situation of charging equipment
Color.
Fig. 4 is a kind of solar charging circuit schematic diagram provided in an embodiment of the present invention, below to this implementation by taking Fig. 4 as an example
Example is illustrated, in following solar charging circuit, the first filter circuit 210, voltage regulator circuit 300, the second filter circuit
220, voltage conversion circuit 400 and indicator light circuit 500 are successively whole in parallel, when sun-generated electric power 100 is converted to solar energy
After electric energy, electric energy is inputted by the input terminal of solar charging circuit, passes through electricity in parallel in the first filter circuit 210 first
Hold, be followed successively by the first electrolytic capacitor C18 and first capacitor C16, source of stable pressure D3 uses TL431 in voltage regulator circuit 300, wherein
The reference pole difference 3rd resistor R36 and two the 7th resistance R39 and the 6th resistance R38 in parallel of TL431, anode with it is in parallel
The other end of 7th resistance R39 and the 6th resistance R38 and first resistor R35 connection, cathode and the 5th resistance R33 and the second electricity
Hinder R34 connection, wherein the 5th resistance R33 is also connect with the first capacitor C16 of the first filter circuit 210, and second resistance R34 is also
It is connect with the base stage of the second triode Q8, the emitter of the second triode Q8 connects the first capacitor of the first filter circuit 210 respectively
The collector of C16 and the first triode Q5, the collector of the second triode Q8 base stage and first with the first triode Q5 respectively
Resistance R35 connection, the emitter of the first triode Q5 meet the second capacitor C23 and 3rd resistor of the second filter circuit 220 respectively
R36.Second capacitor C23 and the second electrolytic capacitor C17 are successively in parallel in second filter circuit 220.It is electric in voltage conversion circuit 400
Conversion chip U9 is pressed to use GPM2513, wherein the first pin (pin 5) of conversion chip GPM2513 connects the 4th resistance respectively
R25 and third capacitor C24, the other end of the 4th resistance R25 also with the second electrolytic capacitor C17 of the second filter circuit 220 and
The positive pole of USB interface 520 connects, and third capacitor C24 is another with the second electrolytic capacitor C17's of the second filter circuit 220
End connection, the second pin (pin 2) and capacitor C25 of conversion chip GPM2513 connect the second electrolysis electricity of the second filter circuit 220
Hold the same end of C17, and is connect with the power cathode of USB interface 520, the third pin (pin 1) of conversion chip GPM2513
Connect the data anode and data cathode of USB interface 520 respectively with the 4th pin (pin 6).LED in indicator light circuit 500 refers to
Show that the positive pin A of lamp LED1 connects the positive pole of USB interface 520, the cathode of LED light LED1 by the 8th resistance R40
Pin K connects the power cathode of USB interface 520.
Wherein, first triode Q5 and first resistor R35 constitute pressure difference adjustment circuit 310, third in voltage regulator circuit 300
Resistance R36 and the 6th resistance R38, the 7th resistance R39 in parallel are for adjusting 330 output voltage of source of stable pressure, according to source of stable pressure 330
The output voltage of Output Voltage Formula, voltage regulator circuit 300 should are as follows:
According to the data that Fig. 4 is provided, R36=10K Ω, R38=150K Ω, R39=9.76K Ω calculates to obtain Vout=
5.23V, then the output voltage of voltage regulator circuit 300 is 5.23V.
The present invention also provides a kind of solar chargers, including sun-generated electric power 100 and solar charging circuit.
Further, the solar panel of sun-generated electric power 100 is polysilicon.
Specifically, since solar charger uses whole technical solutions of above-described embodiment, at least have upper
All beneficial effects brought by the technical solution of embodiment are stated, this is no longer going to repeat them.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of solar charging circuit, is electrically connected with sun-generated electric power characterized by comprising filter circuit, pressure stabilizing electricity
Road, voltage conversion circuit, indicator light circuit and USB interface；
The filter circuit includes the first filter circuit and the second filter circuit in parallel, the input terminal of first filter circuit
It is electrically connected with the sun-generated electric power, the voltage regulator circuit is installed in the output end of first filter circuit and described second and filters
Between the input terminal of wave circuit, the output end of second filter circuit is electrically connected with the voltage conversion circuit, the instruction
Circuit for lamp is connected in parallel between the voltage conversion circuit and the USB interface；
Wherein, the voltage regulator circuit includes source of stable pressure, source of stable pressure input circuit, pressure stabilizing source follower circuit and pressure difference adjustment circuit,
The reference pole of the source of stable pressure is connect with the source of stable pressure input circuit, the anode of the source of stable pressure and the pressure difference adjustment circuit
Connection, the cathode of the source of stable pressure are connect with the voltage-stabilizing output circuit.
2. solar charging circuit according to claim 1, which is characterized in that pressure difference adjustment circuit includes the first triode
And first resistor, voltage regulator circuit further include shunt circuit, shunt circuit includes the second triode and second resistance, wherein first
The base stage of triode is connect with first resistor, and the emitter of the first triode is connect with the emitter of the second triode, and the two or three
The collector of pole pipe is connect with first resistor, and the base stage of the first triode is connect with first resistor, the collector of the first triode
It is connect with 3rd resistor.
3. solar charging circuit according to claim 1 or 2, which is characterized in that the source of stable pressure is TL431.
4. solar charging circuit according to claim 2, which is characterized in that first triode is FZT788B, institute
Stating the second triode is 2N3906.
5. solar charging circuit according to claim 1, which is characterized in that first filter circuit includes the first electricity
Capacitor and first capacitor are solved, second filter circuit includes the second electrolytic capacitor and the second capacitor.
6. solar charging circuit according to claim 1, which is characterized in that the voltage conversion circuit includes: voltage
Conversion chip, the 4th resistance and third capacitor, the first pin of the voltage conversion chip connect the 4th resistance and third electricity respectively
Holding, the other end of the 4th resistance is also connect with the positive pole of the second electrolytic capacitor of the second filter circuit and USB interface, the
Three capacitors are connect with the other end of the second electrolytic capacitor of the second filter circuit, and the second pin and the third capacitor of conversion chip connect
The same end of second electrolytic capacitor of the second filter circuit, and connect with the power cathode of USB interface, the third of conversion chip
Pin and the 4th pin connect the data anode and data cathode of USB interface respectively.
7. solar charging circuit according to claim 6, which is characterized in that the voltage conversion chip is GPM2513.
8. solar charging circuit according to claim 1, which is characterized in that the indicator light in the indicator light circuit is
Three-primary color LED lamp.
9. a kind of solar charger, which is characterized in that including sun-generated electric power and solar charging according to claims 1-8
Circuit.
10. a kind of solar charger, which is characterized in that the solar panel of the sun-generated electric power is polysilicon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910444677.7A CN110138039A (en) | 2019-05-24 | 2019-05-24 | A kind of solar charging circuit and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910444677.7A CN110138039A (en) | 2019-05-24 | 2019-05-24 | A kind of solar charging circuit and charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110138039A true CN110138039A (en) | 2019-08-16 |
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Cited By (1)
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| CN113054692A (en) * | 2019-12-26 | 2021-06-29 | 国基电子（上海）有限公司 | Solar charging system and charging method thereof |
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