CN215932480U - Power supply circuit and electrical equipment - Google Patents
Power supply circuit and electrical equipment Download PDFInfo
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- CN215932480U CN215932480U CN202121923050.9U CN202121923050U CN215932480U CN 215932480 U CN215932480 U CN 215932480U CN 202121923050 U CN202121923050 U CN 202121923050U CN 215932480 U CN215932480 U CN 215932480U
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Abstract
The application discloses a power supply circuit and electrical equipment, wherein the circuit comprises a power supply module and a voltage division adjusting module which are electrically connected with each other; the power supply module is used for providing a first direct current voltage and outputting the first direct current voltage to the partial pressure regulating module; and the voltage division adjusting module is used for carrying out voltage division processing on the first direct current voltage so as to realize voltage reduction, and obtaining second direct current voltage output so as to realize power supply. This application carries out the partial pressure through partial pressure adjusting module to first direct current voltage and handles the purpose that reaches the step-down, for integrated devices such as adopting voltage converter or stabiliser carry out voltage conversion among the prior art, has reduced supply circuit's occupation space, has reduced the circuit cost, has realized miniaturized low-cost supply circuit.
Description
Technical Field
The application relates to the technical field of electronic circuits, in particular to a power supply circuit and electrical equipment.
Background
The electric equipment is a general name of appliances which can work only by being electrified, generally, the household electric equipment supplies power through an urban power distribution network, in China, the urban power distribution network directly faces to vast power consumers, the power supply mode can be summarized into a high-voltage receiving-transformer step-down-low-voltage distribution mode, and generally, high-voltage electricity of a power plant is converted into 220V commercial power to be supplied to the power consumers after being subjected to step-down conversion by a transformer substation.
Generally, the working voltage of the main control chip on the circuit board of the electrical equipment is 5V or 3.3V of direct current, so that after the commercial power flows into the electrical equipment, the commercial power is generally stepped down by electronic devices such as a switching power supply, a voltage converter or a voltage stabilizer on the circuit board in sequence, and then a voltage adapted to the main control chip is output to supply power to the electrical equipment.
However, since the voltage converter or the voltage stabilizer is an integrated device integrated with electronic components, the size is large and the unit price is high, and therefore, the voltage converter or the voltage stabilizer is adopted to supply power to the main control chip, which easily results in large occupied space of a power supply part and high cost.
SUMMERY OF THE UTILITY MODEL
The application provides a power supply circuit and electrical equipment, aims at solving and adopts integrated devices such as voltage converter or stabiliser to supply power for main control chip among the prior art, leads to power supply part occupation space great easily, and the higher problem of cost.
In a first aspect, the present application provides a power supply circuit, including a power module and a voltage division adjusting module electrically connected to each other;
the power supply module is used for providing a first direct current voltage and outputting the first direct current voltage to the partial pressure regulating module;
and the voltage division adjusting module is used for carrying out voltage division processing on the first direct current voltage so as to realize voltage reduction, and obtaining second direct current voltage output so as to realize power supply.
In one possible implementation manner of the present application, the voltage division adjusting module includes a voltage reduction module and a voltage adjusting module, the voltage reduction module is electrically connected to an output end of the power module, and an output end of the voltage reduction module is electrically connected to the voltage adjusting module;
the voltage reduction module is used for reducing the first direct-current voltage to obtain second direct-current voltage output;
and the voltage regulating module is used for regulating the voltage value of the output second direct current voltage.
In one possible implementation manner of the present application, the voltage regulation module includes a comparator and a voltage divider electrically connected to each other, and the comparator and the voltage divider are electrically connected to an output terminal of the voltage reduction module respectively;
a comparison device for providing a reference voltage of the second direct current voltage;
and the voltage dividing device is used for dividing the reference voltage so as to adjust the voltage value of the second direct current voltage.
In a possible implementation manner of the present application, the voltage divider includes a first resistor and a second resistor, one end of the second resistor is connected to the output end of the voltage reduction module, and the other end of the second resistor is connected to the grounded first resistor.
In one possible implementation manner of the application, the comparator is a voltage regulator, a cathode of the voltage regulator is connected to an output end of the voltage reduction module, an anode of the voltage regulator is grounded, and a reference electrode of the voltage regulator is connected to a connection position of the first resistor and the second resistor.
In one possible implementation of the present application, the voltage reduction module is a voltage reduction resistor.
In a possible implementation manner of the present application, the voltage dropping module includes a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor, where the fourth resistor is connected in parallel with the sixth resistor, the fifth resistor is connected in parallel with the seventh resistor, the fourth resistor is connected in series with the fifth resistor, and the sixth resistor is connected in series with the seventh resistor.
In a possible implementation manner of the present application, the output end of the voltage reduction module is further electrically connected to a microcontroller, and the voltage reduction module outputs a second direct current voltage to supply power to the microcontroller.
In one possible implementation manner of the present application, the power supply circuit further includes a filtering module, the filtering module includes an input filtering device and an output filtering device, the input filtering device is electrically connected to the output end of the power supply module, and the output filtering device is electrically connected to the output end of the voltage division adjusting module;
the input filter device is used for filtering the first direct current voltage;
and the output filter device is used for carrying out filter processing on the second direct current voltage.
In a second aspect, the present application further provides an electrical apparatus, in which the power supply circuit of the first aspect is integrated.
In one possible implementation manner of the present application, the electrical device is an air conditioner.
1. In this application, carry out the partial pressure through partial pressure adjusting module to first direct current voltage and handle the purpose that reaches the step-down, for adopting integrated devices such as voltage converter or stabiliser to carry out voltage conversion among the prior art, reduced supply circuit's occupation space, reduced the circuit cost, realized miniaturized low-cost supply circuit.
2. In this application, the fourth resistance and the sixth resistance that step-down module adopted parallelly connected and fifth resistance and seventh resistance combine fourth resistance and fifth resistance to establish ties, and the sixth resistance establishes ties with the seventh resistance, can solve the step-down module and lead to the too high problem of device temperature because of the power is too big, has ensured the normal operating of circuit, has improved circuit reliability.
Drawings
In order to more clearly illustrate the technical solutions in the present application, the drawings that are needed to be used in the description of the present application will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a power supply circuit provided in an embodiment of the present application;
FIG. 2 is a schematic circuit diagram of a voltage divider module provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of another circuit of a voltage divider regulating module provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of an electrical apparatus provided in the embodiment of the present application.
Detailed Description
The technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The following describes the power supply circuit and the electrical equipment provided in the present application in detail.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a power supply circuit provided in an embodiment of the present application. The power supply circuit may include a power module 100 and a voltage division adjusting module 200 electrically connected to each other, wherein the power module 100 may be configured to provide a first direct current voltage and output the first direct current voltage to the voltage division adjusting module 200; the voltage division adjusting module 200 may be configured to divide the first dc voltage to implement voltage reduction, and obtain a second dc voltage output to implement power supply.
In this embodiment, the first dc voltage output by the power module 100 may be a dc voltage output by the switching power supply device 103, and in particular, the power module 100 may include a rectifier module 101, a filter device 102 and a switching power supply device 103 which are electrically connected in sequence, wherein the rectifier module 101 may be connected to a mains supply, in general, the mains supply distributed to a home of an electric power user through a city power distribution network is a 220V ac voltage, for example, in this embodiment, the rectifier module 101 may be a rectifier bridge, a rectifier and other rectifier devices, the 220V ac voltage is rectified by the rectifier module 101 and then converted into a dc voltage, and then the dc voltage is filtered by the filter device 102 and flows into the switching power supply device 103, in this embodiment, the filter device 102 may be an electrolytic capacitor, and may also be an RC filter circuit composed of a resistor and a capacitor.
The switching Power Supply device 103 may be a Switching Mode Power Supply (SMPS), which is also called a switching Power Supply (SMPS), a switching converter (SMPS), which is a high-frequency Power conversion device that can convert a voltage with one level into a voltage or a current required by a user terminal through different types of architectures, an input of the SMPS may be an ac voltage such as a utility Power, or a dc voltage such as a rectified utility Power, and an output of the SMPS is mostly a dc voltage required by a user terminal device. Therefore, in this embodiment, the switching power supply device 103 may convert the dc voltage rectified by the rectifying module 101 into a first dc voltage and output the first dc voltage to the voltage division adjusting module 200.
Because the first direct current voltage of switching power supply device 103 output may be higher than the rated operating voltage of electronic components on the circuit board in the electrical equipment, therefore, in order to enable electronic components to work normally, in the embodiment of the present application, the voltage division processing is performed on the first direct current voltage through the voltage division adjusting module 200 to realize the voltage reduction of the first direct current voltage, so that the second direct current voltage obtained after the voltage reduction can be matched with the rated operating voltage of the electronic components, so that the electronic components can work normally, and further, the operation of the electrical equipment is ensured. It should be noted that, because there are a plurality of electronic components on the circuit board in the electrical apparatus, rated operating voltages of different electronic components may be different, in this embodiment of the application, after the voltage division adjusting module 200 steps down the first direct current voltage, the voltage value of the obtained second direct current voltage may have different values.
In the embodiment of the application, carry out the partial pressure through partial pressure adjusting module 200 and handle the purpose that reaches the step-down to first direct current voltage, for adopting integrated devices such as voltage converter or stabiliser to carry out voltage conversion among the prior art, reduced power supply circuit's occupation space, reduced the circuit cost, realized miniaturized low-cost power supply circuit.
Referring to fig. 1, in some embodiments of the present application, the voltage division adjusting module 200 may include a voltage reduction module 201 and a voltage adjusting module 202, wherein the voltage reduction module 201 is electrically connected to an output terminal of the power module 100, and an output terminal of the voltage reduction module 201 is electrically connected to the voltage adjusting module 202; the voltage reduction module 201 may be configured to reduce the first dc voltage to obtain a second dc voltage output; the voltage regulation module 202 may be configured to regulate a voltage value of the output second dc voltage. Specifically, in this embodiment of the application, the voltage-reducing module 201 can divide the first dc voltage in an energy-consuming manner, and therefore, the voltage-reducing module 201 may be a load, such as a resistor, and when a current flows through the load, a voltage drop may occur on the load, so that voltages at two ends of the load may be unequal, and the voltage at the current input end may be higher than the voltage at the current output end, so that the first dc voltage may be reduced by the load to obtain the second dc voltage.
In order to enable the second dc voltage output by the voltage dividing adjusting module 200 to be matched with the rated working voltage of the electronic component, in this embodiment of the application, the voltage value of the second dc voltage output by the voltage reducing module 201 may also be adjusted by the voltage adjusting module 202, so that the second dc voltage conforms to the rated working voltage of the electronic component. Specifically, in some embodiments of the present application, the voltage regulation module 202 may include a comparator 2021 and a voltage divider 2022 electrically connected to each other, and the comparator 2021 and the voltage divider 2022 are electrically connected to the output end of the voltage reduction module 201 respectively; the comparator 2021 may be configured to provide a reference voltage of the second dc voltage; the voltage divider 2022 may be configured to divide the reference voltage to adjust a voltage value of the second dc voltage.
Specifically, as shown in fig. 2, for a schematic circuit schematic diagram of the voltage division adjusting module 200 provided in the embodiment of the present application, in some embodiments of the present application, the voltage reduction module 201 may be a voltage reduction resistor R3, in fig. 2, VDD may be a first direct current voltage output by the power module 100, and VCC may be a second direct current voltage output by the voltage division adjusting module 200, so that one end of the voltage reduction resistor R3 is connected to the output end of the power module 100, and the other end is an output end of the power supply circuit, and is used for outputting the second direct current voltage.
Referring to fig. 2, in some embodiments of the present application, the comparator 2021 may be a voltage regulator of model TL431K, a cathode of the voltage regulator TL431K is connected to an output terminal of the voltage step-down module 201, that is, a cathode of the voltage regulator TL431K is connected to an output terminal of the voltage step-down resistor R3, an anode of the voltage regulator TL431K is grounded, and a reference electrode of the voltage regulator TL431K is connected to the voltage divider 2022. Specifically, as shown in fig. 2, in the embodiment of the present application, the voltage divider 2022 may include a first resistor R1 and a second resistor R2, wherein one end of the second resistor R2 is connected to the output end of the voltage-reducing module 201, that is, one end of the second resistor R2 is connected to the output end of the voltage-reducing resistor R3, the other end of the second resistor R2 is connected to the first resistor R1, the other end of the first resistor R1 is grounded, and a connection between the first resistor R1 and the second resistor R2 is connected to the reference electrode of the voltage-stabilizing source TL 431K.
In the embodiment of the application, the voltage regulator TL431K is a controllable precise voltage regulator, the output voltage of the voltage regulator may be set to any value within the range from 2.5V to 36V as a reference source, the voltage regulator TL431K is a unidirectional conducting device, which may be equivalent to a voltage regulator diode, only when the voltage of the reference electrode is higher than the voltage of the reference source, such as 2.5V, the voltage regulator TL431K is turned on, and when the voltage of the reference electrode is lower than the voltage of the reference source, such as 2.5V, the voltage regulator TL431K is in a cut-off state.
Since the voltage regulator TL431K contains a reference source, in this embodiment of the present application, the reference voltage of the second dc voltage provided by the comparator 2021 may be the reference source of the voltage regulator TL431K, such as 2.5V, so that when the output feedback is introduced to the reference electrode of the voltage regulator TL431K, the device may control the output voltage by shunting from the cathode to the anode in a wide range, thereby implementing the regulation of the second dc voltage. Specifically, since the first resistor R1 is connected in parallel with the reference electrode of the voltage regulator TL431K, the voltage of the first resistor R1 is equal to the voltage between the reference electrode and the anode of the voltage regulator TL431K, and assuming that the current flowing through the first resistor R1 is represented as I, the calculation formula of the voltage of the second resistor R2 can be represented as: IR2 ═ IR1+ Iref, where ref represents the self-impedance of the voltage regulator TL431K, and since the self-impedance of the voltage regulator TL431K is small, the unit of calculation of Iref is uA level, which is substantially negligible, the equation of calculation of the voltage of the second resistor R2 can be equivalent to: IR2 ═ IR 1.
Since the voltage of the first resistor R1 is equal to the voltage between the reference electrode and the anode of the voltage regulator TL431K, that is, the voltage of the first resistor R1 is equal to the reference source of the voltage regulator TL431K, the IR1 is equal to Vref, so the calculation formula of the current I can be expressed as: therefore, the voltage of the cathode of the regulated voltage source TL431K, i.e., the second direct current voltage VCC, can be calculated by the following formula:
VCC＝(R1+R2)I＝Vref*(R1+R2)/R1
since Vref is a reference source of the voltage regulator TL431K, when the voltage regulator TL431K is manufactured by a manufacturer, the value of Vref is fixed and known, and therefore, in this embodiment, the voltage value of the second dc voltage can be adjusted by adjusting the resistance values of the first resistor R1 and the second resistor R2.
For example, if the reference source Vref of the voltage regulator TL431K has a value of 2.5V, and the resistance values of the first resistor R1 and the second resistor R2 are equal and both are 10K Ω, the second dc voltage VCC can be calculated to be 5V according to the calculation formula of the second dc voltage VCC. Therefore, the first resistor R1 and the second resistor R2 with different resistance values can be selected according to the rated operating voltages of different electronic components, so that the obtained second direct current voltage VCC is adapted to the rated operating voltage of the electronic components, but it should be noted that the adjustable range of the output voltage of the voltage regulator TL431K is any value within the range of the reference source such as 2.5V to 36V, that is, the range of the amplitude of the second direct current voltage VCC is also 2.5V to 36V, and if the value is lower than 2.5V or higher than 36V, the required second direct current voltage may not be obtained by adjusting the resistance values of the first resistor R1 and the second resistor R2. In addition, because the condition that the current flowing through the cathode of the voltage regulator TL431K needs to be greater than 1mA is necessary for the operation of the voltage regulator TL431K, in practical applications, when the resistance values of the first resistor R1 and the second resistor R2 are selected, it is necessary to ensure that the current flowing through the cathode of the voltage regulator TL431K is greater than 1 mA.
Referring to fig. 1, in some embodiments of the present application, an output end of the voltage-reducing module 201 may further be electrically connected to the microcontroller 300, the second dc voltage output by the voltage-reducing module 201 may be used to supply power to the microcontroller 300, in addition, the power supply circuit may further include a filtering module 400, the filtering module 400 may include an input filtering device 401 and an output filtering device 402, where the input filtering device 401 is electrically connected to an output end of the power module 100, and the output filtering device 402 is electrically connected to an output end of the voltage-dividing adjusting module 200; the input filter device 401 may be configured to filter the first direct-current voltage; the output filter device 402 may be used to filter the second dc voltage. Because there may be an ac component in the first dc voltage output by the power module 100, in order to avoid interference of the ac component in the first dc voltage on electronic components, an input filter device 401 is used at the output end of the power module 100 to filter the ac component in the first dc voltage, so that there is no ac component in the first dc voltage flowing into the voltage-reducing module 201; likewise, in order to further ensure that no ac component is present in the second dc voltage flowing into the microcontroller 300, in the present embodiment, the ac component in the second dc voltage is further filtered by connecting the output filter device 402 to the output terminal of the voltage-reducing module 201, so that the microcontroller 300 can stably operate under the power supply of the second dc voltage. As shown in fig. 2, in some embodiments of the present application, the input filter device 401 may be a second electrolytic capacitor E2, wherein the anode of the second electrolytic capacitor E2 is connected to the first dc voltage VDD, and the cathode of the second electrolytic capacitor E2 is grounded; similarly, the output filter device 402 may also be a first electrolytic capacitor E1, wherein the positive electrode of the first electrolytic capacitor E1 is connected to the output terminal of the step-down varistor R3, that is, the positive electrode of the first electrolytic capacitor E1 is connected to the second dc voltage VCC, and the negative electrode of the first electrolytic capacitor E1 is grounded; in the embodiment of the present application, the characteristics of "ac and dc blocking" of the capacitor are utilized to filter the ac components in the first dc voltage VDD and the second dc voltage VCC, and the dc components can flow into the microcontroller 300 without being affected, so as to supply power to the microcontroller 300.
As shown in fig. 3, for another schematic circuit schematic diagram of the voltage division adjusting module 200 provided in the embodiment of the present application, in some embodiments of the present application, the voltage dropping module 201 may further include a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7, where the fourth resistor R4 is connected in parallel with the sixth resistor R6, the fifth resistor R5 is connected in parallel with the seventh resistor R7, the fourth resistor R4 is connected in series with the fifth resistor R5, the sixth resistor R6 is connected in series with the seventh resistor R7, that is, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, and the seventh resistor R7 implement a two-series and two-parallel connection manner, and a connection of the fourth resistor R635 and the sixth resistor R6 is connected to an output terminal of the power supply module 100, that is, that a connection of the fourth resistor R4 and the sixth resistor R6 is connected to the first dc voltage TL, and a connection of the seventh resistor R599 is connected to the VDD regulator 431.
Specifically, as shown in fig. 2, if the voltage-reducing module 201 is a voltage-reducing resistor R3, the calculation formula of the output current Io at the second dc voltage VCC end can be represented as: io ═ VDD-VCC)/R3, it can be seen that the value of the current flowing into the microcontroller 300 can be adjusted by adjusting the resistance value of the voltage-reducing resistor R3, and since the voltage-reducing module 201 needs to consume the voltage difference between the first dc voltage VDD and the second dc voltage VCC, the operating power of the voltage-reducing module 201 may be relatively large, and if the power of the voltage-reducing module 201 is relatively large, the temperature rise of the voltage-reducing resistor R3 may be too high by only using the voltage-reducing resistor R3 to consume the voltage difference, and once the temperature rise of the voltage-reducing resistor R3 is too high, the voltage-reducing resistor R3 may not work continuously due to overheating, so that the power supply circuit is damaged, which not only affects the normal operation of the microcontroller 300, but also may cause the microcontroller 300 to be burned out due to bear a relatively large voltage; therefore, when the temperature rise is high due to the excessive power of the step-down resistor R3 while the step-down resistor R3 is used for step-down, the step-down can be performed by two parallel strings of the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, and the seventh resistor R7.
In general, in practical applications, the rated power of the resistor needs to be reduced by 50%, so the calculation formula of the power P of the voltage-reducing resistor R3 can be expressed as: p ═ VDD-VCC)2If the power P is greater than 50% of the rated power of the voltage-reducing resistor R3 due to a large voltage difference between the first dc voltage VDD and the second dc voltage VCC, the voltage can be reduced by two parallel strings of the fourth resistor R4, the fifth resistor R5, the sixth resistor R6 and the seventh resistor R7, in this embodiment, the voltage-reducing module 201 adopts the parallel strings of the fourth resistor R4 and the sixth resistor R6, the fifth resistor R5 and the seventh resistor R53924, and combines the fourth resistor R4 and the fifth resistor R7 in series, and the sixth resistor R6 and the seventh resistor R7 in series, so that the problem of over-high device temperature caused by over-high power of the voltage-reducing module 201 can be solved, the normal operation of the circuit is ensured, and the reliability of the circuit is improved. It should be noted that the two-in-two-string manner of four resistors provided in this embodiment is only for reducing powerIn practical applications, other ways that can reduce power and raise temperature may also be used to consume the voltage difference between the first dc voltage VDD and the second dc voltage VCC, which is not described herein again.
Fig. 4 is a schematic structural diagram of an electrical apparatus provided in the embodiment of the present application. On the basis of the foregoing embodiments, the present application further provides an electrical apparatus 500, where any one of the power supply circuits in the foregoing embodiments is integrated in the electrical apparatus 500, and in some embodiments, the electrical apparatus 500 may be an air conditioner or other household appliance. Specifically, the power supply circuit may be connected to a commercial power, and the second dc voltage output by the power supply circuit may be used to supply power to the microcontroller 300 of the electrical apparatus 500, so that the microcontroller 300 controls the operation of the electrical apparatus 500.
In some embodiments of the present application, the electrical apparatus 500 is an air conditioner, and in this embodiment, the first dc voltage may be 12V dc voltage outputted by the switching power supply device, and in a general case, since the operating voltage of the microcontroller 300 is typically 5V or 3.3V, in this embodiment, the second dc voltage may be 5V or 3.3V, and the microcontroller 300 may be a main control chip, a single chip, or the like for controlling the operation of the air conditioner, in this embodiment of the present application, the purpose of reducing the voltage is achieved by carrying out voltage division processing on the first direct current voltage through the voltage division adjusting module, and compared with the prior art that voltage conversion is carried out by adopting integrated devices such as a voltage converter or a voltage stabilizer, the occupied space of the power supply circuit is reduced, the circuit cost is reduced, the miniaturized low-cost power supply circuit is realized, and further the miniaturization of electrical equipment is realized and the manufacturing cost of the electrical equipment is reduced.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, and are not described herein again.
In a specific implementation, each unit or structure may be implemented as an independent entity, or may be combined arbitrarily to be implemented as one or several entities, and the specific implementation of each unit or structure may refer to the foregoing embodiments, which are not described herein again.
The above detailed description is provided for a power supply circuit and an electrical device provided in the present application, and specific examples are applied in the present application to explain the principle and the implementation of the present application, and the above description is only used to help understand the circuit and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A power supply circuit is characterized by comprising a power supply module and a voltage division adjusting module which are electrically connected with each other;
the power supply module is used for providing a first direct current voltage and outputting the first direct current voltage to the partial pressure regulating module;
and the voltage division adjusting module is used for carrying out voltage division processing on the first direct current voltage so as to realize voltage reduction and obtain second direct current voltage output so as to realize power supply.
2. The power supply circuit according to claim 1, wherein the voltage division regulating module comprises a voltage reduction module and a voltage regulating module, the voltage reduction module is electrically connected with the output end of the power supply module, and the output end of the voltage reduction module is electrically connected with the voltage regulating module;
the voltage reduction module is used for reducing the first direct-current voltage to obtain the second direct-current voltage output;
the voltage adjusting module is used for adjusting the voltage value of the output second direct current voltage.
3. The power supply circuit according to claim 2, wherein the voltage regulating module comprises a comparing device and a voltage dividing device electrically connected to each other, and the comparing device and the voltage dividing device are electrically connected to the output terminal of the voltage dropping module, respectively;
the comparison device is used for providing a reference voltage of the second direct current voltage;
the voltage dividing device is used for dividing the reference voltage so as to adjust the voltage value of the second direct current voltage.
4. The power supply circuit according to claim 3, wherein the voltage divider comprises a first resistor and a second resistor, one end of the second resistor is connected to the output terminal of the voltage-dropping module, and the other end of the second resistor is connected to the first resistor connected to ground.
5. The power supply circuit according to claim 4, wherein the comparison device is a voltage regulator, a cathode of the voltage regulator is connected with the output end of the voltage reduction module, an anode of the voltage regulator is grounded, and a reference electrode of the voltage regulator is connected with a connection position of the first resistor and the second resistor.
6. The power supply circuit of claim 2, wherein the voltage dropping module is a voltage dropping resistor.
7. The power supply circuit of claim 2, wherein the voltage dropping module comprises a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor, wherein the fourth resistor is connected in parallel with the sixth resistor, the fifth resistor is connected in parallel with the seventh resistor, the fourth resistor is connected in series with the fifth resistor, and the sixth resistor is connected in series with the seventh resistor.
8. The power supply circuit according to claim 2, wherein the output end of the voltage reduction module is further electrically connected with a microcontroller, and the voltage reduction module outputs the second direct current voltage to supply power to the microcontroller.
9. The power supply circuit of claim 1, further comprising a filtering module, wherein the filtering module comprises an input filtering device and an output filtering device, the input filtering device is electrically connected to the output terminal of the power supply module, and the output filtering device is electrically connected to the output terminal of the voltage division regulating module;
the input filter device is used for filtering the first direct current voltage;
and the output filter device is used for filtering the second direct current voltage.
10. An electrical appliance, characterized in that the supply circuit of any one of claims 1-9 is integrated in the electrical appliance.
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| CN202121923050.9U CN215932480U (en) | 2021-08-16 | 2021-08-16 | Power supply circuit and electrical equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121923050.9U CN215932480U (en) | 2021-08-16 | 2021-08-16 | Power supply circuit and electrical equipment |
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| CN215932480U true CN215932480U (en) | 2022-03-01 |
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