CN209881443U - Solar charging circuit and charger - Google Patents
Solar charging circuit and charger Download PDFInfo
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- CN209881443U CN209881443U CN201920769256.7U CN201920769256U CN209881443U CN 209881443 U CN209881443 U CN 209881443U CN 201920769256 U CN201920769256 U CN 201920769256U CN 209881443 U CN209881443 U CN 209881443U
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Abstract
The utility model provides a solar charging circuit and charger relates to solar charging technical field. A solar charging circuit electrically connected to a solar power source, comprising: the USB interface comprises a filter circuit, a voltage stabilizing circuit, a voltage conversion circuit, an indicator light circuit and a USB interface; the filter circuit comprises a first filter circuit and a second filter circuit which are connected in parallel, the input end of the first filter circuit is electrically connected with the solar power supply, the voltage stabilizing circuit is arranged between the output end of the first filter circuit and the input end of the second filter circuit, the output end of the second filter circuit is electrically connected with the voltage conversion circuit, and the indicator light circuit is connected between the voltage conversion circuit and the USB interface in parallel; in the voltage stabilizing circuit, a reference electrode of a voltage stabilizing source is connected with a voltage stabilizing source input circuit, an anode of the voltage stabilizing source is connected with a voltage difference adjusting circuit, and a cathode of the voltage stabilizing source is connected with a voltage stabilizing source output circuit. The voltage difference adjusting circuit is arranged in the voltage stabilizing circuit, so that the condition that the equipment to be charged is damaged due to unstable voltage during charging is avoided.
Description
Technical Field
The utility model relates to a solar charging technical field particularly, relates to a solar charging circuit and charger.
Background
At present, solar power generation is a new renewable energy source, and is as large as a special solar power station and as small as a charger for charging mobile equipment such as mobile phones, and the solar power generation is utilized most vividly at present.
In the prior art, a solar charging device is basically directly connected with a power output device, and then a diode is adopted to prevent electric quantity from flowing back to a solar panel.
However, when sunlight is unstable (e.g., rainy days), a large voltage difference is easily generated, which causes unstable charging voltage of the solar charging device, and further causes damage to components of the solar charging device, and more seriously, the solar charging device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a solar charging circuit and charger to the not enough among the above-mentioned prior art, can realize low-voltage difference voltage stabilizing circuit for solar charging device's charging voltage is stable.
In order to achieve the above object, the utility model adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a solar charging circuit, including: the USB interface comprises a filter circuit, a voltage stabilizing circuit, a voltage conversion circuit, an indicator light circuit and a USB interface;
the filter circuit comprises a first filter circuit and a second filter circuit which are connected in parallel, the input end of the first filter circuit is electrically connected with the solar power supply, the voltage stabilizing circuit is arranged between the output end of the first filter circuit and the input end of the second filter circuit, the output end of the second filter circuit is electrically connected with the voltage conversion circuit, and the indicator light circuit is connected between the voltage conversion circuit and the USB interface in parallel;
the voltage stabilizing circuit comprises a voltage stabilizing source, a voltage stabilizing source input circuit, a voltage stabilizing source output circuit and a differential pressure adjusting circuit, wherein a reference electrode of the voltage stabilizing source is connected with the voltage stabilizing source input circuit, an anode of the voltage stabilizing source is connected with the differential pressure adjusting circuit, and a cathode of the voltage stabilizing source is connected with the voltage stabilizing source output circuit.
Furthermore, the voltage difference adjusting circuit comprises a first triode and a first resistor, the voltage stabilizing circuit further comprises a shunt circuit, the shunt circuit comprises a second triode and a second resistor, wherein the base of the first triode is connected with the first resistor, the emitter of the first triode is connected with the emitter of the second triode, the collector of the second triode is connected with the first resistor, the base of the second triode is connected with the first resistor, and the collector of the second triode is connected with a third resistor.
Further, the voltage regulator is TL 431.
Further, the first triode is FZT788B, and the second triode is 2N 3906.
Further, the first filter circuit comprises a first electrolytic capacitor and a first capacitor, and the second filter circuit comprises a second electrolytic capacitor and a second capacitor.
Further, the voltage conversion circuit includes: the voltage conversion circuit comprises a voltage conversion chip, a fourth resistor and a third capacitor, wherein a first pin of the voltage conversion chip is respectively connected with the fourth resistor and the third capacitor, the other end of the fourth resistor is also connected with a second electrolytic capacitor of a second filter circuit and a power supply anode of a USB interface, the third capacitor is connected with the other end of the second electrolytic capacitor of the second filter circuit, a second pin and the third capacitor of the conversion chip are connected with the same end of the second electrolytic capacitor of the second filter circuit and are connected with a power supply cathode of the USB interface, and the third pin and the fourth pin of the conversion chip are respectively connected with a data anode and a data cathode of the USB interface.
Further, the voltage conversion chip is a GPM 2513.
Further, an indicator lamp in the indicator lamp circuit is a tricolor LED lamp.
In a second aspect, the present invention further provides a solar charger, which comprises a solar power source and the solar charging circuit according to the first aspect.
Furthermore, the solar panel of the solar power supply is made of polysilicon.
The utility model has the advantages that:
the utility model provides a solar charging circuit and charger through having set up voltage stabilizing circuit for solar charging circuit to set up pressure difference regulating circuit among the voltage stabilizing circuit, voltage stabilizing circuit can also adjust the voltage in stabilizing voltage, makes the pressure differential of steady voltage in-process reduce, thereby can guarantee solar charging device's charging voltage stability, has avoided the condition that the voltage instability caused the damage of treating the battery charging outfit when charging.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic block diagram of a solar charging circuit according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a voltage stabilizing circuit in a solar charging circuit according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of an indicator light in a solar charging circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a solar charging circuit according to an embodiment of the present invention.
100-solar power supply; 200-a filter circuit; 210-a first filter circuit; 220-a second filter circuit; 300-voltage stabilizing circuit; 310-a differential pressure adjustment circuit; 320-a voltage divider circuit; 330-voltage regulator; 340-a shunt circuit; 400-voltage conversion circuit; 500-indicator light circuit; 510-an indicator light; 520-USB interface; 530-RGB control chip of LED; c18 — first electrolytic capacitor; c16 — first capacitance; r36 — third resistance; r39 — seventh resistor; r38-sixth resistance; r33-fifth resistor; r34 — second resistance; r35 — first resistance; d3-voltage regulator; q8-second transistor; q5-first triode; c23 — second capacitance; c17 — second electrolytic capacitor; r25-fourth resistor; c24 — third capacitance; U9-Voltage conversion chip; LED1-LED indicator light; r40 — eighth resistance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the utility model provides a solar charging circuit, which is electrically connected with a solar power supply 100, including: the circuit comprises a filter circuit 200, a voltage stabilizing circuit 300, a voltage conversion circuit 400, an indicator light circuit 500 and a USB interface 520; the filter circuit 200 comprises a first filter circuit 210 and a second filter circuit 220 which are connected in parallel, the input end of the first filter circuit 210 is electrically connected with the solar power supply 100, a voltage stabilizing circuit 300 is arranged between the output end of the first filter circuit 210 and the input end of the second filter circuit 220, the output end of the second filter circuit 220 is electrically connected with a voltage conversion circuit 400, and an indicator light circuit 500 is connected in parallel between the voltage conversion circuit 400 and the USB interface 520; the voltage stabilizing circuit 300 comprises a voltage stabilizing source 330, a voltage stabilizing source 330 input circuit, a voltage stabilizing source 330 output circuit and a voltage difference adjusting circuit 310, wherein a reference electrode of the voltage stabilizing source 330 is connected with the voltage stabilizing source 330 input circuit, an anode of the voltage stabilizing source 330 is connected with the voltage difference adjusting circuit 310, and a cathode of the voltage stabilizing source 330 is connected with the voltage stabilizing source output circuit.
Specifically, the input end of the first filter circuit 210 in the solar charging circuit is electrically connected to the solar power supply 100, the solar power supply 100 can output a voltage of 6V to 9V, the first filter circuit 210 can adopt a high-frequency filter circuit formed by connecting an electrolytic capacitor with a large capacity and a capacitor with a small capacity in parallel, and is used for filtering a high-frequency signal in the circuit, the output end of the first filter circuit 210 is electrically connected to the input end of the voltage stabilizing circuit 300, the voltage stabilizing circuit 300 can stabilize the voltage of 6V to 9V output by the solar power supply 100 at 5.2V, the output end of the voltage stabilizing circuit 300 is electrically connected to the input end of the second filter circuit 220, the second filter circuit 220 is the same as the first filter circuit 210, and both adopt a structure in which a large electrolytic capacitor and a small capacitor are connected in parallel, and are used for filtering the voltage stabilized by the voltage stabilizing circuit 300 again, the output end of the second filter circuit 220 is electrically connected to the input end of the voltage conversion circuit 400, the voltage conversion circuit 400 is used for converting the voltage in the solar charging circuit into the voltage for the device to be charged, the output end of the voltage conversion circuit 400 is electrically connected to the input end of the indicator lamp circuit 500 and the input end of the indicator lamp circuit 500, and the indicator lamp circuit 500 is used for indicating the current working state of the solar charging circuit.
Specifically, in the solar charging circuit, the solar power supply 100 may not convert the solar energy into electric energy stable enough, and generally needs to be filtered, stabilized and the like before charging the device to be charged. The filter circuit 200 is configured to reduce ac components in the pulsating dc voltage as much as possible, retain the dc components thereof, reduce ripple coefficients of the output voltage, and make waveforms smoother, thereby ensuring that the device to be charged is not damaged by the current of the ac components; the voltage stabilizing circuit 300 is used for fixing unstable voltage converted by the solar power supply 100 in the solar circuit at a stable value so as to ensure normal charging of the device to be charged and prevent the device to be charged from being damaged due to the unstable voltage; the conversion circuit is used for converting the circuit after the voltage stabilizing circuit 300 stabilizes the voltage into a voltage which can be used for charging mobile equipment such as a mobile phone and a tablet computer; the indicator lamp circuit 500 is used for displaying whether the current charging circuit is powered on, when the indicator lamp 510 is powered on, the solar charging circuit is in a powered on working state, and when the indicator lamp is powered off, the solar charging circuit is in a powered off state, so that a user can conveniently know the situation when using the solar charging circuit; the USB interface 520 is used to provide a charging interface for a device to be charged, which can be commonly charged through the USB interface 520.
The filter circuit 200 includes a first filter circuit 210 and a second filter circuit 220, the first filter circuit 210 and the second filter circuit 220 respectively perform filtering twice before and after the voltage regulator circuit 300, the first filter circuit 210 performs filtering first to protect components such as the voltage regulator 330 in the voltage regulator circuit 300, and the second filter circuit 220 performs filtering second after the voltage regulator circuit 300, so as to filter again to make the voltage waveform in the solar charging circuit smoother, and more suitable for supplying power to the device to be charged.
The utility model provides a solar charging circuit and device is through having set up voltage stabilizing circuit for solar charging circuit to set up pressure difference regulating circuit among the voltage stabilizing circuit, voltage stabilizing circuit can also adjust the voltage in stabilizing voltage, makes the pressure differential of steady voltage in-process reduce, thereby can guarantee solar charging device's charging voltage stability, has avoided the condition that the voltage instability caused the damage of treating the battery charging outfit when charging.
Further, the voltage difference adjusting circuit 310 includes a first triode and a first resistor, the voltage stabilizing circuit further includes a shunt circuit, the shunt circuit includes a second triode and a second resistor, wherein, the base of the first triode is connected with the first resistor, the emitter of the first triode is connected with the emitter of the second triode, the collector of the second triode is connected with the first resistor, the base of the second triode is connected with the first resistor, and the collector of the first triode is connected with the third resistor.
Specifically, as shown in fig. 2, when the input voltage is in a rising stage, the current passes through the first filter circuit 210 from the solar power supply 100 and then reaches the fifth resistor, at this time, the voltage generated by the fifth resistor is lower than the on-state voltage of the second transistor, the second transistor is in a cut-off state, so that no voltage is fed back to the reference electrode of the voltage regulator 330, the voltage regulator 330 only has a minimum cathode current, the emitter and the base of the first transistor generate a base current through the first resistor, the base current is amplified, a collector current is generated and flows to the output terminal, and the voltage at the output terminal rises. When the output voltage rises and reaches more than 2.5V after voltage division, the cathode current of the voltage regulator 330 is increased, so that the voltage on the fifth resistor is increased to a state that the second triode is amplified, a part of the collector current generated by the second triode is shunted to the base current of the first triode, the base current of the first triode is reduced, the collector current of the first triode is reduced, and the output voltage is reduced at the moment. The voltage difference adjusting circuit 310, the shunt circuit 340 and the voltage regulator 330 are always in the dynamic balance of the two negative feedbacks, so as to ensure that the output voltage is stabilized at 5.2V, and in addition, the first triode is a low-protection and voltage-drop triode, so that the voltage drop is less than 0.2V in the limit conduction state of the first triode, and the whole circuit has the low voltage difference performance within 0.2V.
Further, voltage regulator 330 is TL 431.
It should be noted that the voltage regulator 330TL431 is adopted in the voltage regulator 300 because TL431 is a controllable precision voltage regulator 330, and its output voltage can be arbitrarily set to any value from Vref (2.5V) to 36V by using two resistors, while the output voltage of a general zener diode can be fixed to only one value. In this embodiment, the third resistor, the sixth resistor and the seventh resistor connected in parallel are used for adjusting the output voltage of the regulator 330, wherein the formula for adjusting the output voltage of the regulator 330 is as follows:
wherein R is1Is a third resistance, R2The sixth resistor and the seventh resistor are connected in parallel.
Further, the first triode is FZT788B, and the second triode is 2N 3906.
Specifically, the first triode and the second triode are both PNP type triodes, wherein, FZT788B is a high-power transistor with high gain, and has very low saturation voltage drop and equivalent resistance, because the solar charging circuit works, the first triode needs to be kept in a conducting state all the time to ensure that the solar charging circuit works normally, so the FZT788B with lower conducting current requirement is adopted. The 2N3906 is a low-power triode, the conduction requirement is higher than FZT788B, and the conduction is only performed when the voltage of the emitter of the 2N3906 is greater than the base voltage by more than 0.7V, which is to keep a dynamic balance state in the voltage stabilizing circuit 300, that is, when the current of the first triode is large, the second triode is also conducted to share the current in the first triode, and finally the input current of the reference electrode of the voltage stabilizing source 330TL431 is a fixed value.
Further, the first filter circuit 210 includes a first electrolytic capacitor and a second capacitor, and the second filter circuit 220 includes a second electrolytic capacitor and a second capacitor.
Specifically, the capacitance of the electrolytic capacitor in the first filter circuit 210 is 220 μ F, the capacitance is 0.1 μ F, the capacitance of the electrolytic capacitor in the second filter circuit 220 is 470 μ F, and the capacitance is 0.1 μ F, so that both the first filter circuit 210 and the second filter circuit 220 are high frequency filter circuits. In the solar charging circuit, only low-frequency signals are needed to process the circuit, and no high-frequency signals are needed, so the first filtering circuit 210 and the second filtering circuit 220, in which an electrolytic capacitor with a large capacity is connected in parallel with a capacitor with a small capacity, are used in the embodiment to filter the high-frequency signals in the solar charging circuit.
Further, the voltage conversion circuit 400 includes: the voltage conversion circuit comprises a voltage conversion chip, a fourth resistor and a third capacitor, wherein a first pin of the voltage conversion chip is respectively connected with the fourth resistor and the third capacitor, the other end of the fourth resistor is also connected with a second electrolytic capacitor of the second filter circuit 220 and a power supply anode of the USB interface 520, the third capacitor is connected with the other end of the second electrolytic capacitor of the second filter circuit 220, a second pin and the third capacitor of the conversion chip are connected with the same end of the second electrolytic capacitor of the second filter circuit 220 and are connected with a power supply cathode of the USB interface 520, and the third pin and the fourth pin of the conversion chip are respectively connected with a data anode and a data cathode of the USB interface 520.
In particular, rechargeable portable devices require an external power source to recharge the battery. Because there is a 5V power supply available, it is convenient to select a USB port for charging. In order to ensure that both the master and slave devices can meet the requirements of power management, universal standards are required. As USB charging has become popular, the charging current of 500mA specified in the USB2.0 specification or the charging current of 900mA specified in the USB3.0 specification has not been able to meet the charging requirements of most devices such as mobile phones, tablet computers, and personal video players, which have charging currents of higher specifications. The master device and the slave device can identify each other through the voltage conversion circuit 400 by means of a handshake protocol, so that the slave device can use the same USB charging line to pull a current exceeding 500mA (defined by UBS2.0 specification) or 900mA (defined by USB3.0 specification) from the master device.
Further, the voltage translation chip is GPM 2513.
Specifically, GPM2513 is a USB dedicated charger controller. The USB interface can be applied to an on-board charger, an AC-DC power adapter with a USB port and other USB charging equipment. The GPM2513 has the characteristic of automatic detection, and can load correct identifiable signals on the DP and the DM in time by detecting the voltage changes on the D + and the D-of the USB, so that the quick charging function of a compatible portable device connected with the USB can be realized. The supported portable device includes: smart phones, 5V charged tablets, and personal media players.
Further, the indicator lamp 510 in the indicator lamp circuit 500 is a three primary color LED lamp.
Specifically, the three primary color LED lamps are respectively connected to the positive electrode and the negative electrode of the power supply of the USB interface 520, and when the charging circuit works, the three primary color LED lamps are turned on to indicate the state of the solar charging circuit.
Optionally, as shown in fig. 3, an LED RGB control chip 530 may be further connected to the positive and negative data pins of the USB interface 520 to obtain the charging condition of the current device to be charged, and the LED RGB control chip 530 controls the color of the three-primary-color LED lamp according to the charging condition, so that the three-primary-color LED lamp displays different colors under different charging conditions of the device to be charged.
Fig. 4 is a schematic diagram of a solar charging circuit according to an embodiment of the present invention, and the embodiment is described below with reference to fig. 4 as an example, in the following solar charging circuit, a first filter circuit 210, a voltage regulator circuit 300, a second filter circuit 220, a voltage conversion circuit 400 and an indicator lamp circuit 500 are sequentially and integrally connected in parallel, when a solar power supply 100 converts solar energy into electric energy, the electric energy is input through an input end of the solar charging circuit, first passes through a capacitor connected in parallel in the first filter circuit 210, and is sequentially a first electrolytic capacitor C18 and a first capacitor C16, a voltage regulator D3 in the voltage regulator circuit 300 adopts a TL431, wherein reference electrodes of the TL431 are respectively connected with a third resistor R36 and two seventh resistors R39 and a sixth resistor R38 connected in parallel, an anode is connected with the other ends of the seventh resistor R39 and the sixth resistor R38 connected in parallel and with the first resistor R35, a cathode is connected with the fifth resistor R33 and the second resistor R34, the fifth resistor R33 is further connected to the first capacitor C16 of the first filter circuit 210, the second resistor R34 is further connected to the base of the second triode Q8, the emitter of the second triode Q8 is connected to the collector of the first capacitor C16 and the collector of the first triode Q5 of the first filter circuit 210, the collector of the second triode Q8 is connected to the base of the first triode Q5 and the first resistor R35, and the emitter of the first triode Q5 is connected to the second capacitor C23 and the third resistor R36 of the second filter circuit 220. The second capacitor C23 and the second electrolytic capacitor C17 in the second filter circuit 220 are connected in parallel in sequence. The voltage conversion chip U9 in the voltage conversion circuit 400 adopts a GPM2513, wherein a first pin (pin 5) of the conversion chip GPM2513 is connected to a fourth resistor R25 and a third capacitor C24, respectively, the other end of the fourth resistor R25 is further connected to a second electrolytic capacitor C17 of the second filter circuit 220 and the power supply positive electrode of the USB interface 520, a third capacitor C24 is connected to the other end of the second electrolytic capacitor C17 of the second filter circuit 220, a second pin (pin 2) and a capacitor C25 of the conversion chip GPM2513 are connected to the same end of the second electrolytic capacitor C17 of the second filter circuit 220 and the power supply negative electrode of the USB interface 520, and a third pin (pin 1) and a fourth pin (pin 6) of the conversion chip GPM2513 are connected to the data positive electrode and the data negative electrode of the USB interface 520, respectively. The positive pin A of the LED indicator light LED1 in the indicator light circuit 500 is connected with the positive electrode of the power supply of the USB interface 520 through the eighth resistor R40, and the negative pin K of the LED indicator light LED1 is connected with the negative electrode of the power supply of the USB interface 520.
The voltage regulator circuit 300 includes a first triode Q5 and a first resistor R35, which form a voltage difference adjustment circuit 310, a third resistor R36, a sixth resistor R38 and a seventh resistor R39 connected in parallel, which are used to adjust the output voltage of the regulator 330, and according to the output voltage formula of the regulator 330, the output voltage of the voltage regulator circuit 300 should be:
based on the data provided in fig. 4, V was calculated for R36 ═ 10K Ω, R38 ═ 150K Ω, and R39 ═ 9.76K ΩoutWhen 5.23V, the output voltage of the voltage stabilizing circuit 300 is 5.23V.
The utility model also provides a solar charger, including solar power supply 100 and solar charging circuit.
Further, the solar panel of the solar power supply 100 is polysilicon.
Specifically, since the solar charger adopts all the technical solutions of the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A solar charging circuit electrically connected with a solar power supply, comprising: the USB interface comprises a filter circuit, a voltage stabilizing circuit, a voltage conversion circuit, an indicator light circuit and a USB interface;
the filter circuit comprises a first filter circuit and a second filter circuit which are connected in parallel, the input end of the first filter circuit is electrically connected with the solar power supply, the voltage stabilizing circuit is arranged between the output end of the first filter circuit and the input end of the second filter circuit, the output end of the second filter circuit is electrically connected with the voltage conversion circuit, and the indicator light circuit is connected between the voltage conversion circuit and the USB interface in parallel;
the voltage stabilizing circuit comprises a voltage stabilizing source, a voltage stabilizing source input circuit, a voltage stabilizing source output circuit and a voltage difference adjusting circuit, wherein a reference electrode of the voltage stabilizing source is connected with the voltage stabilizing source input circuit, an anode of the voltage stabilizing source is connected with the voltage difference adjusting circuit, and a cathode of the voltage stabilizing source is connected with the voltage stabilizing source output circuit.
2. The solar charging circuit of claim 1, wherein the voltage difference adjustment circuit comprises a first transistor and a first resistor, the voltage regulator circuit further comprises a shunt circuit comprising a second transistor and a second resistor, wherein a base of the first transistor is connected to the first resistor, an emitter of the first transistor is connected to an emitter of the second transistor, a collector of the second transistor is connected to the first resistor, a base of the second transistor is connected to the first resistor, and a collector of the first transistor is connected to the third resistor.
3. The solar charging circuit of claim 1 or 2, wherein the voltage regulator is TL 431.
4. The solar charging circuit of claim 2, wherein the first transistor is FZT788B and the second transistor is 2N 3906.
5. The solar charging circuit of claim 1, wherein the first filtering circuit comprises a first electrolytic capacitor and a first capacitor, and the second filtering circuit comprises a second electrolytic capacitor and a second capacitor.
6. The solar charging circuit of claim 1, wherein the voltage conversion circuit comprises: the voltage conversion circuit comprises a voltage conversion chip, a fourth resistor and a third capacitor, wherein a first pin of the voltage conversion chip is respectively connected with the fourth resistor and the third capacitor, the other end of the fourth resistor is also connected with a second electrolytic capacitor of a second filter circuit and a power supply anode of a USB interface, the third capacitor is connected with the other end of the second electrolytic capacitor of the second filter circuit, a second pin and the third capacitor of the conversion chip are connected with the same end of the second electrolytic capacitor of the second filter circuit and are connected with a power supply cathode of the USB interface, and the third pin and the fourth pin of the conversion chip are respectively connected with a data anode and a data cathode of the USB interface.
7. The solar charging circuit of claim 6, wherein the voltage conversion chip is GPM 2513.
8. The solar charging circuit of claim 1, wherein the indicator light in the indicator light circuit is a tricolor LED light.
9. A solar charger comprising a solar power source and a solar charging circuit as claimed in any one of claims 1 to 8.
10. A solar charger as defined in claim 9 wherein the solar power panel is polysilicon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920769256.7U CN209881443U (en) | 2019-05-24 | 2019-05-24 | Solar charging circuit and charger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920769256.7U CN209881443U (en) | 2019-05-24 | 2019-05-24 | Solar charging circuit and charger |
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| CN209881443U true CN209881443U (en) | 2019-12-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138039A (en) * | 2019-05-24 | 2019-08-16 | 胡玉枝 | A kind of solar charging circuit and charger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138039A (en) * | 2019-05-24 | 2019-08-16 | 胡玉枝 | A kind of solar charging circuit and charger |
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Effective date of registration: 20201026 Address after: 322000 1st floor, No.18, Longgang Road, Futian street, Yiwu City, Jinhua City, Zhejiang Province (self declaration) Patentee after: Zhejiang guloude Photovoltaic Technology Co., Ltd Address before: 518000 A3, building 6, Tianlong lane, Qingshui Road, Longcheng street, Longcheng street, Longgang District, Shenzhen, Guangdong Patentee before: Hu Yuzhi |