CN220357480U - Adjustable voltage stabilizing circuit and electronic equipment - Google Patents
Adjustable voltage stabilizing circuit and electronic equipment Download PDFInfo
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- CN220357480U CN220357480U CN202322255800.5U CN202322255800U CN220357480U CN 220357480 U CN220357480 U CN 220357480U CN 202322255800 U CN202322255800 U CN 202322255800U CN 220357480 U CN220357480 U CN 220357480U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to the technical field of electronic circuits, in particular to an adjustable voltage stabilizing circuit and electronic equipment, wherein in the adjustable voltage stabilizing circuit, a voltage input end is used for being connected with a power signal, a first end of a bias branch and a first end of a switch branch are respectively connected with the voltage input end, a second end of the bias branch is connected with a first end of an adjusting branch, and a second end of the adjusting branch is used for being connected with a negative electrode of a load and a voltage output end; the second end of the bias branch is also used for being connected with the second end of the switch branch, and the third end of the switch branch is connected with the positive electrode of the load; the power supply signal is divided by the bias branch and the regulating branch, and a first voltage signal is obtained at the second end of the bias branch; the switch branch is in a conducting state under the drive of the first voltage signal, and outputs a second voltage signal at a third end of the switch branch so as to supply power to the load. The voltage conversion of the power supply signal into the second voltage signal is realized, and the regulation and voltage stabilization of the direct current voltage are realized.
Description
Technical Field
The present utility model relates to the field of electronic circuits, and in particular, to an adjustable voltage stabilizing circuit and an electronic device.
Background
Currently, there are many intelligent home appliances on the market, such as electric toothbrushes, dust collectors, floor sweeping machines, etc., which all need a stable power supply voltage to supply power to a singlechip or a communication module therein. Most of the current market uses power management chips to control voltage regulation and voltage regulation.
The price of the chip on the market is more and more expensive, so that the cost of the intelligent household appliance using the power management chip is higher and higher.
Disclosure of Invention
The utility model provides an adjustable voltage stabilizing circuit and electronic equipment, which can realize adjustable voltage output on the basis of not needing a power management chip, thereby supplying power for different electric appliances.
In a first aspect, an embodiment of the present application provides an adjustable voltage stabilizing circuit, where the adjustable voltage stabilizing circuit includes a voltage input terminal, a bias branch, a switch branch, an adjustment branch, and a voltage output terminal; the voltage input end is used for accessing a power supply signal, the first end of the bias branch and the first end of the switch branch are respectively connected with the voltage input end, the second end of the bias branch is connected with the first end of the regulation branch, and the second end of the regulation branch is used for being connected with the negative electrode of the load and the voltage output end; the second end of the bias branch is also used for being connected with the second end of the switch branch, and the third end of the switch branch is connected with the positive electrode of the load; the power supply signal is divided by the bias branch circuit and the regulating branch circuit, and a first voltage signal is obtained at the second end of the bias branch circuit; the switch branch is in a conducting state under the drive of the first voltage signal, and outputs a second voltage signal at a third end of the switch branch so as to supply power to the load.
In some embodiments, the regulation branch comprises an adjustable voltage dividing unit and a voltage stabilizing unit; the first end of the adjustable voltage division unit and the first end of the voltage stabilizing unit are respectively connected with the second end of the bias branch, the second end of the adjustable voltage division unit is connected with the second end of the voltage stabilizing unit, and the third end of the adjustable voltage division unit and the third end of the voltage stabilizing unit are respectively connected with the negative electrode of the load; the adjustable voltage dividing unit is used for adjusting the voltage dividing of the bias branch and the adjusting branch so as to adjust the first voltage signal; the voltage stabilizing unit is used for stabilizing the voltage drop of the first voltage signal; the first end of the adjustable voltage dividing unit, the first end of the voltage stabilizing unit and the first end of the adjusting branch are the same end, and the third end of the adjustable voltage dividing unit, the third end of the voltage stabilizing unit and the second end of the adjusting branch are the same end.
In some embodiments, the adjustable voltage dividing unit comprises an adjustable resistor, a first resistor and a second resistor; the first end of the adjustable resistor is connected with the adjusting end of the adjustable resistor, the second end of the bias branch, the second end of the switch branch and the first end of the voltage stabilizing unit respectively, the second end of the adjustable resistor is connected with the first end of the first resistor, the second end of the first resistor is connected with the first end of the second resistor and the second end of the voltage stabilizing unit respectively, and the second end of the second resistor is connected with the voltage output end.
In some embodiments, the voltage stabilizing unit comprises a first triode, a second triode, a third resistor and a fourth resistor; the base of the first triode is connected with the second end of the adjustable voltage dividing unit, the collector of the first triode is connected with the second end of the fourth resistor, the first end of the fourth resistor is connected with the first end of the adjustable voltage dividing unit through the third resistor, the first end of the fourth resistor is also connected with the base of the second triode, the emitter of the second triode is connected with the first end of the adjustable voltage dividing unit, and the collector of the second triode is respectively connected with the emitter of the first triode and the voltage output end.
In some embodiments, the bias branch includes a fifth resistor; the first end of the fifth resistor is connected with the first end of the switch branch and the voltage input end respectively, and the second end of the fifth resistor is connected with the second end of the switch branch.
In some embodiments, the switching leg includes a third transistor; the collector of the third triode is used for being connected with the voltage input end, the base of the third triode is respectively connected with the second end of the bias branch and the first end of the regulation branch, and the emitter of the third triode is connected with the positive electrode of the load.
In some embodiments, the adjustable voltage regulator circuit further comprises a transformer and a rectifier; the input end of the transformer is used for being connected with an alternating current power supply, the output end of the transformer is connected with the input end of the rectifier, the positive output end of the rectifier is connected with the voltage input end, and the negative output end of the rectifier is connected with the voltage output end.
In some embodiments, the adjustable voltage regulator circuit further comprises a first filtering branch and a second filtering branch; the first end of the first filtering branch is connected with the voltage input end, and the second end of the first filtering branch is connected with the voltage output end; the first end of the second filtering branch is connected with the positive electrode of the load, and the second end of the second filtering branch is connected with the negative electrode of the load; the first filtering branch is used for filtering the power supply signal; the second filtering branch is used for filtering the second voltage signal.
In some embodiments, the first filtering branch comprises a first capacitance and a second capacitance, and the second filtering branch comprises a third capacitance and a fourth capacitance; the positive electrode of the first capacitor is respectively connected with the first end of the second capacitor and the voltage input end, and the negative electrode of the first capacitor is respectively connected with the second end of the second capacitor and the voltage output end; the positive electrode of the fourth capacitor is respectively connected with the first end of the third capacitor and the positive electrode of the load, and the negative electrode of the fourth capacitor is respectively connected with the second end of the third capacitor and the negative electrode of the load.
In a second aspect, embodiments of the present application provide an electronic device including an adjustable voltage regulator circuit as described above.
Different from the scheme in the prior art, the embodiment of the application provides an adjustable voltage stabilizing circuit and electronic equipment, wherein the adjustable voltage stabilizing circuit comprises a voltage input end, a bias branch circuit, a switch branch circuit, an adjusting branch circuit and a voltage output end; the voltage input end is used for accessing a power supply signal, the first end of the bias branch and the first end of the switch branch are respectively connected with the voltage input end, the second end of the bias branch is connected with the first end of the regulation branch, and the second end of the regulation branch is used for being connected with the negative electrode of the load and the voltage output end; the second end of the bias branch is also used for being connected with the second end of the switch branch, and the third end of the switch branch is connected with the positive electrode of the load; the power supply signal is divided by the bias branch circuit and the regulating branch circuit, and a first voltage signal is obtained at the second end of the bias branch circuit; the switch branch is in a conducting state under the drive of the first voltage signal, and outputs a second voltage signal at a third end of the switch branch so as to supply power to the load. In summary, the switch branch outputs a stable voltage, i.e. the second voltage signal, after the switch branch is turned on. Therefore, the voltage of the power supply signal can be converted into a second voltage signal, and the regulation and voltage stabilization of the direct current voltage can be realized. And moreover, adjustable voltage output is realized on the basis of no need of a power management chip, so that the cost is saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an adjustable voltage regulator circuit according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of an adjustable voltage regulator circuit according to another embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a voltage regulation circuit according to another embodiment of the present disclosure;
FIG. 4 is a schematic structural view of an adjusting arm according to an embodiment of the present disclosure;
fig. 5 is a schematic circuit diagram of an adjustable voltage stabilizing circuit according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and specifically described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the embodiments described are some, but not all, of the embodiments of the present application. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Features described below in the various embodiments of the present application that are not in conflict with each other may be combined.
When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an adjustable voltage stabilizing circuit according to an embodiment of the present application. As shown in fig. 1, the adjustable voltage regulator circuit 100 includes a voltage input terminal 100a, a bias branch 10, a switch branch 20, a regulation branch 30, and a voltage output terminal 100b.
The voltage input end 100a is used for accessing a power signal, the first end of the bias branch 10 and the first end of the switch branch 20 are respectively connected with the voltage input end 100a, the second end of the bias branch 10 is connected with the first end of the adjustment branch 30, the second end of the adjustment branch 30 is used for being connected with the negative electrode of the load 40 and the voltage output end 100b, the second end of the bias branch 10 is also used for being connected with the second end of the switch branch 20, and the third end of the switch branch 20 is connected with the positive electrode of the load 40.
The voltage input 100a of the adjustable voltage regulator 100 may be applied with a power signal, typically a dc power.
Specifically, the power signal is divided by the bias branch 10 and the adjusting branch 30, and a first voltage signal is obtained at the second end of the bias branch 10. Then, the switching branch 20 is in a conductive state under the driving of the first voltage signal, and outputs a second voltage signal at a third terminal of the switching branch 20 to supply power to the load 40.
In practical application, after the power signal passes through the bias branch 10 and the regulation branch voltage, a first voltage signal is obtained at the second end of the switch branch 20. When the voltage of the first voltage signal is greater than the first threshold, the first terminal and the third terminal of the switch branch 20 are turned on, so that the third terminal of the switch branch 20 can output the second voltage signal to the load. When the first threshold is a fixed value after the switch branch 20 is selected, the first threshold may be set according to the actual application situation, which is not particularly limited in the embodiment of the present application. After the selection of the bias branch 10 and the regulation branch 30, the voltage at the second terminal of the switching branch 20, i.e. the voltage of the first voltage signal, is also determined. In summary, the switching branch 20 outputs a stable voltage, i.e. the second voltage signal, after being turned on. Therefore, the voltage of the power supply signal can be converted into a second voltage signal, and the regulation and voltage stabilization of the direct current voltage can be realized. And moreover, adjustable voltage output is realized on the basis of no need of a power management chip, so that the cost is saved.
In one embodiment, as shown in fig. 2, the adjustable voltage regulator circuit 100 further includes a first filtering branch 50 and a second filtering branch 60.
Wherein, a first end of the first filtering branch 50 is connected with the voltage input end 100a, and a second end of the first filtering branch 50 is connected with the voltage output end 100 b; the first end of the second filter leg 60 is connected to the positive pole of the load 40 and the second end of the second filter leg 60 is connected to the negative pole of the load 40.
Specifically, the first filtering branch 50 is configured to filter the power signal; the second filtering branch 60 is used for filtering the second voltage signal.
In some embodiments, as shown in fig. 3, the adjustable voltage regulator circuit 100 further includes a transformer 70 and a rectifier 80.
The input end of the transformer 70 is used for being connected to an alternating current power supply AC, the output end of the transformer 70 is connected to the input end of the rectifier 80, the positive output end of the rectifier 80 is connected to the voltage input end 100a, and the negative output end of the rectifier 80 is connected to the voltage output end 100b.
Specifically, the transformer 70 is used for reducing the voltage of the AC power supply AC to obtain the reduced AC power. The rectifier 80 is used for rectifying the ac power after the voltage reduction to obtain dc power, i.e. the above-mentioned power supply signal.
Specifically, referring to fig. 4, the transformer 70 includes a transformer T1, and the rectifier 80 includes a rectifier DB1. The transformer T1 is connected between an ac power source (not shown) and the rectifier DB1, i.e. the live wire of the ac power source is connected to the first input terminal of the transformer T1 through the interface ACL, and the neutral wire of the ac power source is connected to the second input terminal of the transformer T1 through the interface ACN. The positive output of rectifier DB1 is the voltage input 100a and the negative output of rectifier DB1 is the voltage output 100b. The transformer T1 has the selected power in the range of 80W-100W, the input of the transformer is AC220V, and the output of the transformer is AC28V. The rectifier DB1 is a full bridge rectifier. The rectifier DB1 is configured to convert the ac power output from the transformer T1 into dc power, which is the power supply signal.
In some embodiments, referring to fig. 4, the adjusting branch 30 includes an adjustable voltage dividing unit 31 and a voltage stabilizing unit 32.
The first end of the adjustable voltage dividing unit 31 and the first end of the voltage stabilizing unit 32 are respectively connected with the second end of the bias branch 10, the second end of the adjustable voltage dividing unit 31 is connected with the second end of the voltage stabilizing unit 32, and the third end of the adjustable voltage dividing unit 31 and the third end of the voltage stabilizing unit 32 are respectively connected with the negative electrode of the load 40.
Specifically, the adjustable voltage dividing unit 31 is configured to adjust the voltage dividing of the bias branch 10 and the adjustment branch 30 to adjust the first voltage signal; the voltage stabilizing unit 32 is used for stabilizing the voltage drop of the first voltage signal.
The first end of the adjustable voltage dividing unit 31, the first end of the voltage stabilizing unit 32 and the first end of the adjusting branch 30 are the same, and the third end of the adjustable voltage dividing unit 31, the third end of the voltage stabilizing unit 32 and the second end of the adjusting branch 30 are the same.
In practical applications, the adjustable voltage dividing unit 31 divides the voltage of the power signal together with the bias branch 10, and outputs a first voltage signal to the switch branch 20 at a first end of the adjustable voltage dividing unit 31. The adjustable voltage dividing unit 31 is connected in parallel with the voltage stabilizing unit 32, and the voltage stabilizing unit 32 stabilizes the voltages at two ends of the adjustable voltage dividing unit 31 so as to stabilize the first voltage signal output by the first end of the adjustable voltage dividing unit 31, thereby stabilizing the second voltage signal output by the switch branch 20, and further ensuring that the circuit has stable output.
In some embodiments, referring to fig. 5, fig. 5 is a schematic circuit diagram of an adjustable voltage stabilizing circuit according to an embodiment of the present application. The adjustable voltage division unit 31 includes an adjustable resistor RP, a first resistor R1, and a second resistor R2.
The first end of the adjustable resistor RP is connected to the adjusting end of the adjustable resistor RP, the second end of the bias branch 10, the second end of the switch branch 20, and the first end of the voltage stabilizing unit 32, the second end of the adjustable resistor RP is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the first end of the second resistor R2 and the second end of the voltage stabilizing unit 32, and the second end of the second resistor R2 is connected to the voltage output end 100b.
In some embodiments, the voltage stabilizing unit 32 includes a first transistor Q1, a second transistor Q2, a third resistor R3, and a fourth resistor R4.
The base of the first triode Q1 is connected to the second end of the adjustable voltage dividing unit 31, the collector of the first triode Q1 is connected to the second end of the fourth resistor R4, the first end of the fourth resistor R4 is connected to the first end of the adjustable voltage dividing unit 31 through the third resistor R3, the first end of the fourth resistor R4 is further connected to the base of the second triode Q2, the emitter of the second triode Q2 is connected to the first end of the adjustable voltage dividing unit 31, and the collector of the second triode Q2 is connected to the emitter of the first triode Q1 and the voltage output end 100b.
In this embodiment, the first transistor Q1 is an NPN transistor, and the second transistor Q2 is a PNP transistor. The emitter of the second triode Q2 is the first end of the voltage stabilizing unit 32, the base electrode of the first triode Q1 is the second end of the voltage stabilizing unit 32, and the collector of the second triode Q2 is the third end of the voltage stabilizing unit 32. In some embodiments, the first transistor Q1 is 3DG180 or 2SC3953 in type and the second transistor Q2 is 3CG12 or 3CG80 in type.
In some embodiments, the biasing branch 10 includes a fifth resistor R5.
The first end of the fifth resistor R5 is connected to the first end of the switching branch 20 and the voltage input end 100a, and the second end of the fifth resistor R5 is connected to the second end of the switching branch 20.
In some embodiments, switching branch 20 includes a third transistor Q3.
The collector of the third triode Q3 is connected to the voltage input terminal 100a, the base of the third triode Q3 is connected to the second end of the bias branch 10 and the first end of the regulation branch 30, and the emitter of the third triode Q3 is connected to the positive electrode of the load 40.
In this embodiment, the third transistor Q3 is taken as an NPN transistor. The collector of the NPN triode is the first end of the switch branch 20, the base of the NPN triode is the second end of the switch branch 20, and the emitter of the NPN triode is the third end of the switch branch 20. In some embodiments, the third transistor Q3 is model 2N3055.
In this embodiment, the fifth resistor R5, the adjustable resistor RP, the first resistor R1 and the second resistor R2 divide the power signal together, and the first voltage signal is obtained at the base of the third transistor Q3. When the first voltage signal is greater than the conduction voltage drop of the third triode Q3, the collector and the emitter of the third triode Q3 are conducted, and therefore a second voltage signal is obtained at the emitter of the third triode Q3. Meanwhile, when the fifth resistor R5, the adjustable resistor RP, the first resistor R1 and the second resistor R2 divide the power signal together, a third voltage signal is obtained at the base of the first triode Q1. When the third voltage signal is greater than the conduction voltage drop of the first triode Q1, the collector and the emitter of the first triode Q are conducted. Thus, a fourth voltage signal is obtained at the base of the second triode Q2 through the voltage division of the resistor R3, the resistor R4 and the first triode Q1. When the fourth voltage signal is greater than the conduction voltage drop of the second triode Q2, the emitter and the collector of the second triode Q2 are conducted.
In summary, when the power signal is input, the first transistor Q1, the second transistor Q2 and the third transistor Q3 are all turned on by proper selection, and at this time, the voltage between the emitter and the collector of the first transistor Q1, the voltage between the emitter and the collector of the second transistor Q2 and the voltage between the emitter and the collector of the third transistor Q3 are all kept stable. Therefore, the first triode Q1 and the second triode Q2 are equivalent to voltage stabilizing tubes, and the voltage output by the third triode Q3 is stable.
Specifically, in the present embodiment, when the collector and the emitter of the third transistor Q3 are turned on, the following relationship exists in the adjustable voltage stabilizing circuit 100:
UQ3B＝Ui*[(RPB+R1+R2)/(R5+RPB+R1+R2)]；
wherein UQ3B is the voltage of the first voltage signal, ui is the voltage of the power signal, R1 is the resistance of the first resistor R1, R2 is the resistance of the second resistor R2, and RPB is the resistance of the adjustable resistor RP near the first resistor R1. In general, in this embodiment, after the selection of the type of the adjustable voltage stabilizing circuit 100 is determined, the values of Ui, R5, RPB, R1 and R2 are all fixed values.
In this embodiment, by reasonably adjusting the resistance value of the adjustable resistor RP, that is, RPB, the voltage Uo of the second voltage signal output by the adjustable voltage stabilizing circuit 100 can be made to be the target voltage. Specifically, when the third transistor Q3 is turned on, the voltage value of the second voltage signal may be decreased by decreasing the value of RPB, and the voltage value of the second voltage signal may be increased by increasing the value of RPB.
In this embodiment, the fifth resistor R5 also provides a bias current to the base of the third transistor Q3, so that the third transistor Q3 can remain on. Meanwhile, the fifth resistor R5 and the third triode Q3 form negative feedback, so that the voltage of the second voltage signal output by the third triode Q3 is ensured to be maintained within a reasonable range.
In some embodiments, the first filtering branch 50 includes a first capacitance C1 and a second capacitance C2, and the second filtering branch 60 includes a third capacitance C3 and a fourth capacitance C4.
The positive electrode of the first capacitor C1 is connected to the first end of the second capacitor C2 and the voltage input end 100a, and the negative electrode of the first capacitor C1 is connected to the second end of the second capacitor C2 and the voltage output end 100 b; the positive electrode of the fourth capacitor C4 is connected to the first end of the third capacitor C3 and the positive electrode of the load 40, respectively, and the negative electrode of the fourth capacitor C4 is connected to the second end of the third capacitor C3 and the negative electrode of the load 40, respectively.
In some embodiments, the first capacitor C1 is a 470 μF/450V electrolytic capacitor, the second capacitor C2 and the third capacitor C3 are 0.1 μF monolithic capacitors, and the fourth capacitor C4 is a 470 μF/50V electrolytic capacitor. It should be noted that the types of the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 may be determined according to actual requirements.
In some embodiments, the adjustable voltage regulator circuit 100 further includes a fuse F1. One end of the fuse F1 is connected to the third end of the switch branch 20, and the second end of the fuse F1 is connected to the load.
In some embodiments, fuse F1 is selected from fuses having a rated current in the range of 3A to 5A. It should be noted that the type of the fuse F1 may be determined according to actual requirements.
Specifically, the fuse F1 is configured to open when the current output from the third terminal of the switch branch 20 is too large, thereby achieving the function of protecting the circuit.
The embodiment of the present application provides an adjustable voltage stabilizing circuit 100, where the adjustable voltage stabilizing circuit 100 includes a voltage input terminal 100a, a bias branch 10, a switch branch 20, an adjusting branch 30, and a voltage output terminal 100b. The voltage input end 100a is used for accessing a power signal, the first end of the bias branch 10 and the first end of the switch branch 20 are respectively connected with the voltage input end 100a, the second end of the bias branch 10 is connected with the first end of the adjustment branch 30, the second end of the adjustment branch 30 is used for being connected with the negative electrode of the load 40 and the voltage output end 100b, the second end of the bias branch 10 is also used for being connected with the second end of the switch branch 20, and the third end of the switch branch 20 is connected with the positive electrode of the load 40. Specifically, the power signal is divided by the bias branch 10 and the adjusting branch 30, and a first voltage signal is obtained at the second end of the bias branch 10. Then, the switching branch 20 is in a conductive state under the driving of the first voltage signal, and outputs a second voltage signal at a third terminal of the switching branch 20 to supply power to the load 40. The switching branch 20 outputs a stable voltage, i.e. a second voltage signal, when the switching branch 20 is turned on. Therefore, the voltage of the power supply signal can be converted into a second voltage signal, and the regulation and voltage stabilization of the direct current voltage can be realized. And moreover, adjustable voltage output is realized on the basis of no need of a power management chip, so that the cost is saved.
In a second aspect, embodiments of the present application provide an electronic device that includes an adjustable voltage regulator circuit 100 as described above. The electronic device may be a regulated power supply (stabilized voltage supply).
It should be noted that the description of the present utility model and the accompanying drawings illustrate preferred embodiments of the present utility model, but the present utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations of the utility model, but are provided for a more thorough understanding of the present utility model. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.
Claims (10)
1. The adjustable voltage stabilizing circuit is characterized by comprising a voltage input end, a bias branch circuit, a switch branch circuit, an adjusting branch circuit and a voltage output end;
the voltage input end is used for accessing a power supply signal, the first end of the bias branch and the first end of the switch branch are respectively connected with the voltage input end, the second end of the bias branch is connected with the first end of the regulation branch, and the second end of the regulation branch is used for being connected with the negative electrode of the load and the voltage output end; the second end of the bias branch is also used for being connected with the second end of the switch branch, and the third end of the switch branch is connected with the positive electrode of the load;
the power supply signal is divided by the bias branch circuit and the regulating branch circuit, and a first voltage signal is obtained at the second end of the bias branch circuit;
the switch branch is in a conducting state under the drive of the first voltage signal, and outputs a second voltage signal at a third end of the switch branch so as to supply power to the load.
2. The adjustable voltage regulator circuit of claim 1, wherein the regulation branch comprises an adjustable voltage divider unit and a voltage regulator unit;
the first end of the adjustable voltage division unit and the first end of the voltage stabilizing unit are respectively connected with the second end of the bias branch, the second end of the adjustable voltage division unit is connected with the second end of the voltage stabilizing unit, and the third end of the adjustable voltage division unit and the third end of the voltage stabilizing unit are respectively connected with the negative electrode of the load;
the adjustable voltage dividing unit is used for adjusting the voltage dividing of the bias branch and the adjusting branch so as to adjust the first voltage signal; the voltage stabilizing unit is used for stabilizing the voltage drop of the first voltage signal;
the first end of the adjustable voltage dividing unit, the first end of the voltage stabilizing unit and the first end of the adjusting branch are the same end, and the third end of the adjustable voltage dividing unit, the third end of the voltage stabilizing unit and the second end of the adjusting branch are the same end.
3. The adjustable voltage regulator circuit of claim 2, wherein the adjustable voltage divider unit comprises an adjustable resistor, a first resistor, and a second resistor;
the first end of the adjustable resistor is connected with the adjusting end of the adjustable resistor, the second end of the bias branch, the second end of the switch branch and the first end of the voltage stabilizing unit respectively, the second end of the adjustable resistor is connected with the first end of the first resistor, the second end of the first resistor is connected with the first end of the second resistor and the second end of the voltage stabilizing unit respectively, and the second end of the second resistor is connected with the voltage output end.
4. The adjustable voltage stabilizing circuit according to claim 2, wherein the voltage stabilizing unit comprises a first triode, a second triode, a third resistor and a fourth resistor;
the base of the first triode is connected with the second end of the adjustable voltage dividing unit, the collector of the first triode is connected with the second end of the fourth resistor, the first end of the fourth resistor is connected with the first end of the adjustable voltage dividing unit through the third resistor, the first end of the fourth resistor is also connected with the base of the second triode, the emitter of the second triode is connected with the first end of the adjustable voltage dividing unit, and the collector of the second triode is respectively connected with the emitter of the first triode and the voltage output end.
5. The adjustable voltage regulator circuit of any one of claims 1-4, wherein the bias branch comprises a fifth resistor;
the first end of the fifth resistor is connected with the first end of the switch branch and the voltage input end respectively, and the second end of the fifth resistor is connected with the second end of the switch branch.
6. The adjustable voltage regulator circuit of claim 1, wherein the switching leg comprises a third transistor;
the collector of the third triode is used for being connected with the voltage input end, the base of the third triode is respectively connected with the second end of the bias branch and the first end of the regulation branch, and the emitter of the third triode is connected with the positive electrode of the load.
7. The adjustable voltage regulator circuit of claim 1, further comprising a transformer and a rectifier;
the input end of the transformer is used for being connected with an alternating current power supply, the output end of the transformer is connected with the input end of the rectifier, the positive output end of the rectifier is connected with the voltage input end, and the negative output end of the rectifier is connected with the voltage output end.
8. The adjustable voltage regulator circuit of claim 1, further comprising a first filtering branch and a second filtering branch;
the first end of the first filtering branch is connected with the voltage input end, and the second end of the first filtering branch is connected with the voltage output end;
the first end of the second filtering branch is connected with the positive electrode of the load, and the second end of the second filtering branch is connected with the negative electrode of the load;
the first filtering branch is used for filtering the power supply signal;
the second filtering branch is used for filtering the second voltage signal.
9. The adjustable voltage regulator circuit of claim 8, wherein the first filter leg comprises a first capacitor and a second capacitor, and the second filter leg comprises a third capacitor and a fourth capacitor;
the positive electrode of the first capacitor is respectively connected with the first end of the second capacitor and the voltage input end, and the negative electrode of the first capacitor is respectively connected with the second end of the second capacitor and the voltage output end;
the positive electrode of the fourth capacitor is respectively connected with the first end of the third capacitor and the positive electrode of the load, and the negative electrode of the fourth capacitor is respectively connected with the second end of the third capacitor and the negative electrode of the load.
10. An electronic device comprising the adjustable voltage regulator circuit of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322255800.5U CN220357480U (en) | 2023-08-21 | 2023-08-21 | Adjustable voltage stabilizing circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322255800.5U CN220357480U (en) | 2023-08-21 | 2023-08-21 | Adjustable voltage stabilizing circuit and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN220357480U true CN220357480U (en) | 2024-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322255800.5U Active CN220357480U (en) | 2023-08-21 | 2023-08-21 | Adjustable voltage stabilizing circuit and electronic equipment |
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| Country | Link |
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| CN (1) | CN220357480U (en) |
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- 2023-08-21 CN CN202322255800.5U patent/CN220357480U/en active Active
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