CN220492871U - AC load driving circuit and electronic equipment - Google Patents
AC load driving circuit and electronic equipment Download PDFInfo
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- CN220492871U CN220492871U CN202322095419.7U CN202322095419U CN220492871U CN 220492871 U CN220492871 U CN 220492871U CN 202322095419 U CN202322095419 U CN 202322095419U CN 220492871 U CN220492871 U CN 220492871U
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Abstract
The utility model discloses an alternating current load driving circuit and electronic equipment, wherein the alternating current load driving circuit comprises an alternating current driving circuit, a main control circuit and a power supply circuit, the alternating current driving circuit comprises a bidirectional silicon controlled rectifier, the power supply circuit provides voltage, the main control circuit controls the alternating current driving circuit to be conducted, the alternating current driving circuit drives a load, a power supply end or a grounding end of the power supply circuit is electrically connected with a zero line or a live line of alternating current commercial power through a design circuit, and the bidirectional silicon controlled rectifier is adopted to drive the alternating current load, so that the production cost and the design complexity of a circuit board can be reduced.
Description
Technical Field
The present utility model relates to the field of ac driving technologies, and in particular, to an ac load driving circuit and an electronic device.
Background
Currently, in order to save the cost of electric devices, ac load devices are often selected as devices of the household appliances, and flyback switching power supplies are often required for providing power for circuits due to various factors. And for some special circuits, such as a circuit containing a high-frequency transformer, if a thyristor is used to drive an alternating current load, a light-operated thyristor needs to be added in the driving circuit.
However, it is found that the addition of the light-operated thyristors increases the cost of the electrical device, which is contrary to the original purpose of cost saving, and the addition of the light-operated thyristors causes a certain difficulty in circuit design layout and control. Therefore, it is important to provide a low-cost and simple-circuit design ac load driving circuit.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an alternating current load driving circuit and electronic equipment, which can reduce the production cost and the design complexity of a circuit board.
In order to solve the technical problem, a first aspect of the present utility model discloses an ac load driving circuit, the ac load driving circuit includes an ac driving circuit, a main control circuit and a power supply circuit, the ac driving circuit includes a bidirectional thyristor, wherein:
the anode of the bidirectional thyristor is electrically connected with the control end of the main control circuit, the power supply end of the main control circuit is electrically connected with the power supply end of the power supply circuit, the cathode of the bidirectional thyristor is grounded, the control end of the bidirectional thyristor is electrically connected with a load, the target end of the power supply circuit is electrically connected with a zero line or a live line of alternating current mains supply, and the target end of the power supply circuit comprises the power supply end of the power supply circuit or the grounding end of the power supply circuit;
the main control circuit is used for controlling the alternating current driving circuit to be conducted under the condition that the power supply circuit provides driving voltage, so that the alternating current driving circuit drives the load.
As an optional implementation manner, in the first aspect of the present utility model, the ac driving circuit further includes a first current limiting module, a first end of the first current limiting module is electrically connected to the anode of the bidirectional thyristor, and a second end of the first current limiting module is electrically connected to the control end of the main control circuit;
the first current limiting module is used for limiting the current of the branch circuit where the first current limiting module is located.
As an optional implementation manner, in the first aspect of the present utility model, the ac load driving circuit further includes a current driving circuit, where the current driving circuit includes a switching device and a second current limiting module, a first end of the switching device is electrically connected to a first end of the second current limiting module, a second end of the second current limiting module is electrically connected to a control end of the main control circuit, a second end of the switching device is electrically connected to a power supply end of the power supply circuit or is used for grounding, and a third end of the switching device is electrically connected to a second end of the first current limiting module;
the switching device is used for controlling the conduction of the alternating current driving circuit;
the second current limiting module is used for limiting the current of the branch circuit where the second current limiting module is located.
As an optional implementation manner, in the first aspect of the present utility model, the switching device includes a PNP transistor or a PMOS transistor, where:
when the switching device is the PNP triode, the first end of the switching device is the base electrode of the PNP triode, and the second end of the switching device is the emitter electrode of the PNP triode; the third end of the switching device is the collector electrode of the PNP triode;
when the switching device is the PMOS tube, the first end of the switching device is the grid electrode of the PMOS tube, the second end of the switching device is the source electrode of the PMOS tube, and the third end of the switching device is the drain electrode of the PMOS tube;
the target end of the power supply circuit is a grounding end of the power supply circuit, and the second end of the switching device is electrically connected with the power supply end of the power supply circuit.
As an alternative embodiment, in the first aspect of the present utility model, the switching device includes an NPN transistor or an NMOS transistor, wherein:
when the switching device is the NPN triode, the first end of the switching device is the base electrode of the NPN triode, and the second end of the switching device is the emitter electrode of the NPN triode; the third end of the switching device is the collector electrode of the NPN triode;
when the switching device is the NMOS tube, the first end of the switching device is the grid electrode of the NMOS tube, the second end of the switching device is the source electrode of the NMOS tube, and the third end of the switching device is the drain electrode of the NMOS tube;
the target end of the power supply circuit is a power supply end of the power supply circuit, and the second end of the switching device is used for grounding.
As an alternative embodiment, in the first aspect of the present utility model, the power supply circuit includes a non-isolation circuit and a step-down circuit, wherein:
the input end of the non-isolation circuit is used for being electrically connected with a zero line and a fire wire of alternating current commercial power, the power supply end of the non-isolation circuit is electrically connected with the first power supply end of the voltage reduction circuit, and the second power supply end of the voltage reduction circuit is electrically connected with the power supply end of the main control circuit;
the non-isolation circuit is used for outputting voltage to the main control circuit;
the step-down circuit is used for step-down the output voltage of the non-isolation circuit to the voltage required by the main control circuit.
As an optional implementation manner, in the first aspect of the present utility model, the non-isolation circuit includes a rectifying circuit, a filtering circuit, a power chip switch control circuit, and a secondary rectifying and filtering circuit, where:
the input end of the rectifying circuit is used for being electrically connected with a zero line and a fire wire of alternating current commercial power, the output end of the rectifying circuit is electrically connected with the input end of the filtering circuit, the output end of the filtering circuit is electrically connected with the input end of the power chip switch control circuit, the output end of the power chip switch control circuit is electrically connected with the input end of the secondary rectifying and filtering circuit, and the power supply end of the secondary rectifying and filtering circuit is electrically connected with the first power end of the voltage reducing circuit.
As an optional implementation manner, in the first aspect of the present utility model, the non-isolated circuit further includes a safety protection circuit, wherein:
the input end of the safety protection circuit is used for being electrically connected with a zero line and a fire wire of alternating current commercial power, and the output end of the safety protection circuit is electrically connected with the input end of the rectifying circuit.
As an alternative embodiment, in the first aspect of the present utility model, the load includes one of a heat dissipating fan, a head shaking motor, an illumination lamp, a furnace lamp, a heat generating plate, and a PTC heating element.
A second aspect of the utility model discloses an electronic device comprising an ac load driving circuit as any one of the first aspect.
The implementation of the utility model has the following beneficial effects:
the utility model provides an alternating current load driving circuit, which comprises an alternating current driving circuit, a main control circuit and a power supply circuit, wherein the alternating current driving circuit comprises a bidirectional silicon controlled rectifier, an anode of the bidirectional silicon controlled rectifier is electrically connected with a control end of the main control circuit, a power supply end of the main control circuit is electrically connected with a power supply end of the power supply circuit, a cathode of the bidirectional silicon controlled rectifier is used for grounding, the control end of the bidirectional silicon controlled rectifier is used for electrically connecting with a load, a target end of the power supply circuit is used for electrically connecting with a zero line or a fire wire of alternating current commercial power, and the target end of the power supply circuit comprises a power supply end of the power supply circuit or a grounding end of the power supply circuit; and the main control circuit is used for controlling the alternating current driving circuit to be conducted under the condition that the power supply circuit provides driving voltage so that the alternating current driving circuit drives the load. Therefore, the utility model enables the power supply end or the grounding end of the power supply circuit to be electrically connected with the zero line or the live line of the alternating current commercial power through the design circuit, and adopts the bidirectional silicon controlled rectifier to drive the alternating current load, so that the production cost and the design complexity of the circuit board can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an ac load driving circuit according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of an ac driving circuit according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a current driving circuit according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of another current driving circuit according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of a power supply circuit according to an embodiment of the present utility model;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present utility model.
Detailed Description
For a better understanding and implementation, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, unless explicitly specified and limited otherwise, the term "electrically connected" in the description of the utility model and in the claims and in the above-mentioned figures should be understood in a broad sense, for example, as a fixed electrical connection, as a removable electrical connection, or as an integral electrical connection; can be mechanically and electrically connected or can be mutually communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. Furthermore, the terms first, second and the like in the description and in the claims of the utility model and in the foregoing figures, are used for distinguishing between different objects and not for describing a particular sequential order, and are not intended to cover any exclusive inclusion. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The utility model discloses an alternating current load driving circuit and electronic equipment, which can reduce the production cost and design complexity of a circuit board. The following will describe in detail.
Example 1
Referring to fig. 1, fig. 1 is a schematic structural diagram of an ac load driving circuit according to an embodiment of the present utility model, and the circuit can be applied to any electronic device with an ac load device, which is not limited by the embodiment of the present utility model. As shown in fig. 1, the ac load driving circuit includes an ac driving circuit, a main control circuit and a power supply circuit, the ac driving circuit includes a bidirectional thyristor, wherein:
the anode of the bidirectional thyristor is electrically connected with the control end of the main control circuit, the power end of the main control circuit is electrically connected with the power supply end of the power supply circuit, the cathode of the bidirectional thyristor is grounded, the control end of the bidirectional thyristor is electrically connected with a load, the target end of the power supply circuit is electrically connected with a zero line or a fire wire of alternating current mains supply, and the target end of the power supply circuit comprises the power supply end of the power supply circuit or the grounding end of the power supply circuit;
the main control circuit comprises a main control chip and is used for controlling the alternating current driving circuit to be conducted under the condition that the power supply circuit provides driving voltage so that the alternating current driving circuit drives a load.
Optionally, in an embodiment of the present utility model, the load includes one of a heat dissipation fan, a head shaking motor, an illumination lamp, a furnace lamp, a heating plate, and a PTC heating element.
Thus, the alternating current load driving circuit can simplify circuit design and control by adopting alternating current components such as a heat dissipation fan, a shaking motor, an illuminating lamp, a furnace lamp, a heating disc, a PTC heating element and the like or products containing the alternating current components.
It can be seen that implementing the ac load driving circuit described in fig. 1, where the ac load driving circuit includes an ac driving circuit, a main control circuit, and a power supply circuit, where the ac driving circuit includes a bidirectional thyristor, and the power supply circuit provides a voltage, the main control circuit controls the ac driving circuit to be turned on, the ac driving circuit drives a load, and the power supply end or the ground end of the power supply circuit is electrically connected to a zero line or a live line of an ac mains supply through the design circuit, and the bidirectional thyristor is used to drive the ac load, so that the production cost and the design complexity of the circuit board can be reduced.
In an alternative embodiment, the ac driving circuit further includes a first current limiting module R1, a first end of the first current limiting module R1 is electrically connected to the anode of the triac, and a second end of the first current limiting module R1 is electrically connected to the control end of the main control circuit; the first current limiting module R1 is configured to limit a current of a branch where the first current limiting module R1 is located.
Fig. 2 is a schematic structural diagram of an ac driving circuit according to an embodiment of the present utility model, where, as shown in fig. 2, a first current limiting module R1 may include any resistor R1 or a combination of resistor R1 and other electronic components capable of performing a current limiting function, a first end of resistor R1 is electrically connected to an anode of a bidirectional thyristor, and a second end of resistor R1 is electrically connected to a control end of a main control circuit; the resistor R1 is used for limiting the current of the branch circuit where the first current limiting module is located.
Therefore, the first current limiting module is arranged on the alternating current driving circuit to limit the current flowing from the main control circuit to the alternating current driving circuit, so that the current flowing through the bidirectional thyristor cannot be too large, the bidirectional thyristor is protected, and the damage of the bidirectional thyristor is reduced.
In another alternative embodiment, the ac load driving circuit further includes a current driving circuit, the current driving circuit includes a switching device Q1 and a second current limiting module R2, a first end of the switching device Q1 is electrically connected to a first end of the second current limiting module R2, a second end of the second current limiting module R2 is electrically connected to a control end of the main control circuit, a second end of the switching device Q1 is electrically connected to a power supply end of the power supply circuit or is used for grounding, and a third end of the switching device Q1 is electrically connected to a second end of the first current limiting module R1;
a switching device Q1 for controlling the conduction of the AC drive circuit;
the second current limiting module R2 is configured to limit the current of the branch where the second current limiting module R2 is located.
In this way, a current driving circuit comprising a switching device and a second current limiting module is added in the alternating current load driving circuit, and the second current limiting module limits the current flowing from the main control circuit to the switching device, so that the switching device is protected, and the switching device is not damaged due to overhigh voltage; meanwhile, the current limiting ensures that the current flowing through the bidirectional thyristor cannot be too large, thereby protecting the bidirectional thyristor and reducing the damage of the bidirectional thyristor.
In this alternative embodiment, the switching device Q1 may optionally include any device or component that is not limited to a transistor or a MOS transistor and the like and can perform an equivalent switching control function, and the type of the switching device Q1 is not specifically limited herein.
In yet another alternative embodiment, the switching device Q1 includes a PNP transistor or a PMOS transistor, and:
when the switching device is a PNP triode, as shown in fig. 3, fig. 3 is a schematic structural diagram of a current driving circuit according to an embodiment of the present utility model; the first end of the switching device Q1 is the base electrode of the PNP triode, and the second end of the switching device Q1 is the emitter electrode of the PNP triode; the third end of the switching device Q1 is the collector electrode of the PNP triode;
when the switching device Q1 is a PMOS tube, the first end of the switching device Q1 is the grid electrode of the PMOS tube, the second end of the switching device Q1 is the source electrode of the PMOS tube, and the third end of the switching device Q1 is the drain electrode of the PMOS tube;
the target terminal of the power supply circuit is a ground terminal of the power supply circuit, and the second terminal of the switching device Q1 is electrically connected to the power supply terminal of the power supply circuit.
Therefore, the switching device is a PNP triode or a PMOS tube, the on-off of the circuit can be controlled, and the current flowing from the main control circuit to the alternating current driving circuit is limited, so that the current flowing through the bidirectional thyristor cannot be too large, the bidirectional thyristor is protected, and the damage of the bidirectional thyristor is reduced.
In yet another alternative embodiment, the switching device Q1 includes an NPN transistor or an NMOS transistor, and:
when the switching device Q1 is an NPN triode, as shown in fig. 4, fig. 4 is a schematic structural diagram of another current driving circuit according to an embodiment of the present utility model; the first end of the switching device Q1 is the base electrode of the NPN triode, and the second end of the switching device Q1 is the emitter electrode of the NPN triode; the third end of the switching device Q1 is the collector electrode of an NPN triode;
when the switching device Q1 is an NMOS tube, the first end of the switching device Q1 is the grid electrode of the NMOS tube, the second end of the switching device Q1 is the source electrode of the NMOS tube, and the third end of the switching device Q1 is the drain electrode of the NMOS tube;
the target terminal of the power supply circuit is a power supply terminal of the power supply circuit, and the second terminal of the switching device Q1 is used for grounding.
Therefore, the switching device is a PNP triode or a PMOS tube, the on-off of the circuit can be controlled, and the current flowing from the main control circuit to the alternating current driving circuit is limited, so that the current flowing through the bidirectional thyristor cannot be too large, the bidirectional thyristor is protected, and the damage of the bidirectional thyristor is reduced.
In yet another alternative embodiment, fig. 5 is a schematic structural diagram of a power supply circuit disclosed in an embodiment of the present utility model, where, as shown in fig. 5, the power supply circuit includes a non-isolation circuit and a step-down circuit, and in which:
the input end of the non-isolation circuit is used for electrically connecting a zero line and a fire wire of alternating current commercial power, the power supply end of the non-isolation circuit is electrically connected with the first power supply end of the voltage reduction circuit, and the second power supply end of the voltage reduction circuit is electrically connected with the power supply end of the main control circuit;
the non-isolation circuit is used for outputting voltage to the main control circuit;
and the voltage reducing circuit is used for reducing the output voltage of the non-isolation circuit to the voltage required by the main control circuit.
Therefore, the power supply circuit is divided into the non-isolation circuit and the voltage reduction circuit, the non-isolation circuit is used for outputting voltage to the main control circuit, and the voltage reduction circuit is used for reducing the output voltage of the non-isolation circuit to the voltage required by the main control circuit, so that the driving capability of the main control chip on the silicon controlled rectifier is enhanced, and the silicon controlled rectifier is stable and reliable.
In yet another alternative embodiment, as shown in fig. 5, the non-isolated circuit includes a rectifying circuit, a filtering circuit, a power chip switch control circuit, and a secondary rectifying and filtering circuit, wherein:
the input end of the rectifying circuit is used for being electrically connected with a zero line and a fire wire of alternating current commercial power, the output end of the rectifying circuit is electrically connected with the input end of the filtering circuit, the output end of the filtering circuit is electrically connected with the input end of the power chip switch control circuit, the output end of the power chip switch control circuit is electrically connected with the input end of the secondary rectifying and filtering circuit, and the power supply end of the secondary rectifying and filtering circuit is electrically connected with the first power end of the voltage reducing circuit.
In this way, the alternating voltage is converted into the unidirectional pulsating direct voltage through the rectifying circuit, the filtering circuit and the secondary rectifying and filtering circuit filter alternating components in the unidirectional pulsating voltage after rectification to enable the unidirectional pulsating voltage to be smooth direct voltage, and therefore the power chip switch control circuit controls and outputs the voltage required by the main control circuit.
In yet another alternative embodiment, as shown in fig. 5, the non-isolated circuit further comprises a safety protection circuit, wherein:
the input end of the safety protection circuit is used for being electrically connected with a zero line and a fire wire of alternating current commercial power, and the output end of the safety protection circuit is electrically connected with the input end of the rectifying circuit.
Therefore, the safety of the circuit can be guaranteed by arranging the safety protection circuit, so that the personal safety of a user can be guaranteed.
In the embodiment of the present utility model, referring to fig. 3 and 5, the working principle of the ac load driving circuit is as follows:
the power supply circuit comprises a non-isolation circuit and a voltage reduction circuit, the power supply end of the power supply circuit is connected to a zero line of alternating current commercial power, the alternating current commercial power outputs a direct current voltage through the non-isolation circuit, the direct current voltage is reduced to a main control circuit, namely a power supply voltage required by a main control chip in the diagram, through the voltage reduction circuit, the main control chip directly drives a bidirectional thyristor of an alternating current driving circuit, and the bidirectional thyristor can control the switching and closing of an alternating current load;
the switching and closing process of the bidirectional thyristor controlled alternating current load is as follows: when the main control chip outputs low level, the PNP triode is conducted, so that the bidirectional thyristor in the alternating current drive circuit has voltage difference, and the bidirectional thyristor is conducted to drive an alternating current load; when the main control chip outputs high level, the PNP triode is cut off, so that the bidirectional triode is not used for driving an alternating current load.
Example two
Referring to fig. 6, fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present utility model, which includes an ac load driving circuit according to any one of the first embodiment. It should be noted that, for the detailed description of the ac load driving circuit, please refer to the detailed description of the related contents in the first embodiment, and the detailed description is omitted.
Therefore, implementing the electronic device described in fig. 6, by designing the circuit to electrically connect the power supply end or the ground end of the power supply circuit to the zero line or the live line of the ac mains supply, and driving the ac load by using the bidirectional thyristor, the production cost and the design complexity of the circuit board can be reduced.
The foregoing describes in detail an ac load driving circuit disclosed in the embodiments of the present utility model, and specific embodiments are applied herein to illustrate the principles and implementations of the present utility model, but the foregoing preferred embodiments are not intended to limit the present utility model, and the above description of the embodiments is only for aiding in understanding the method and core idea of the present utility model; also, it is apparent to those skilled in the art from this disclosure that many changes can be made in this embodiment and this application without departing from the spirit and scope of the utility model, which is set forth in the following claims.
Claims (10)
1. The alternating current load driving circuit is characterized by comprising an alternating current driving circuit, a main control circuit and a power supply circuit, wherein the alternating current driving circuit comprises a bidirectional thyristor, and the alternating current driving circuit comprises:
the anode of the bidirectional thyristor is electrically connected with the control end of the main control circuit, the power supply end of the main control circuit is electrically connected with the power supply end of the power supply circuit, the cathode of the bidirectional thyristor is grounded, the control end of the bidirectional thyristor is electrically connected with a load, the target end of the power supply circuit is electrically connected with a zero line or a live line of alternating current mains supply, and the target end of the power supply circuit comprises the power supply end of the power supply circuit or the grounding end of the power supply circuit;
the main control circuit is used for controlling the alternating current driving circuit to be conducted under the condition that the power supply circuit provides driving voltage, so that the alternating current driving circuit drives the load.
2. The ac load driving circuit according to claim 1, further comprising a first current limiting module (R1), wherein a first end of the first current limiting module (R1) is electrically connected to an anode of the triac, and a second end of the first current limiting module (R1) is electrically connected to a control end of the main control circuit;
the first current limiting module (R1) is used for limiting the current of the branch where the first current limiting module (R1) is located.
3. The ac load driving circuit according to claim 2, further comprising a current driving circuit, the current driving circuit comprising a switching device (Q1) and a second current limiting module (R2), a first end of the switching device (Q1) being electrically connected to a first end of the second current limiting module (R2), a second end of the second current limiting module (R2) being electrically connected to a control end of the main control circuit, a second end of the switching device (Q1) being electrically connected to a supply end of the supply circuit or for grounding, a third end of the switching device (Q1) being electrically connected to a second end of the first current limiting module (R1);
the switching device (Q1) is used for controlling the conduction of the alternating current driving circuit;
the second current limiting module (R2) is used for limiting the current of the branch where the second current limiting module (R2) is located.
4. The ac load driving circuit of claim 3, wherein the switching device comprises a PNP transistor or a PMOS transistor, wherein:
when the switching device (Q1) is the PNP triode, the first end of the switching device (Q1) is the base electrode of the PNP triode, and the second end of the switching device (Q1) is the emitter electrode of the PNP triode; a third end of the switching device (Q1) is a collector electrode of the PNP triode;
when the switching device (Q1) is the PMOS tube, the first end of the switching device (Q1) is the grid electrode of the PMOS tube, the second end of the switching device (Q1) is the source electrode of the PMOS tube, and the third end of the switching device (Q1) is the drain electrode of the PMOS tube;
the target end of the power supply circuit is a grounding end of the power supply circuit, and the second end of the switching device is electrically connected with the power supply end of the power supply circuit.
5. The ac load driving circuit according to claim 3, wherein the switching device comprises an NPN transistor or an NMOS transistor, wherein:
when the switching device (Q1) is the NPN triode, the first end of the switching device (Q1) is the base electrode of the NPN triode, and the second end of the switching device (Q1) is the emitter electrode of the NPN triode; a third end of the switching device (Q1) is a collector electrode of the NPN triode;
when the switching device (Q1) is the NMOS tube, the first end of the switching device (Q1) is the grid electrode of the NMOS tube, the second end of the switching device (Q1) is the source electrode of the NMOS tube, and the third end of the switching device (Q1) is the drain electrode of the NMOS tube;
the target end of the power supply circuit is a power supply end of the power supply circuit, and the second end of the switching device is used for grounding.
6. The ac load driving circuit according to claim 1, wherein the power supply circuit includes a non-isolated circuit and a step-down circuit, wherein:
the input end of the non-isolation circuit is used for being electrically connected with a zero line and a fire wire of alternating current commercial power, the power supply end of the non-isolation circuit is electrically connected with the first power supply end of the voltage reduction circuit, and the second power supply end of the voltage reduction circuit is electrically connected with the power supply end of the main control circuit;
the non-isolation circuit is used for outputting voltage to the main control circuit;
the step-down circuit is used for step-down the output voltage of the non-isolation circuit to the voltage required by the main control circuit.
7. The ac load driving circuit of claim 6, wherein the non-isolated circuit comprises a rectifying circuit, a filtering circuit, a power chip switch control circuit, and a secondary rectifying and filtering circuit, wherein:
the input end of the rectifying circuit is used for being electrically connected with a zero line and a fire wire of alternating current commercial power, the output end of the rectifying circuit is electrically connected with the input end of the filtering circuit, the output end of the filtering circuit is electrically connected with the input end of the power chip switch control circuit, the output end of the power chip switch control circuit is electrically connected with the input end of the secondary rectifying and filtering circuit, and the power supply end of the secondary rectifying and filtering circuit is electrically connected with the first power end of the voltage reducing circuit.
8. The ac load driving circuit of claim 7, wherein the non-isolated circuit further comprises a safety protection circuit, wherein:
the input end of the safety protection circuit is used for being electrically connected with a zero line and a fire wire of alternating current commercial power, and the output end of the safety protection circuit is electrically connected with the input end of the rectifying circuit.
9. The ac load driving circuit according to any one of claims 1 to 8, wherein the load comprises one of a heat radiation fan, a head shaking motor, an illumination lamp, a furnace lamp, a heat generating disc, and a PTC heating element.
10. An electronic device comprising an ac load driving circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322095419.7U CN220492871U (en) | 2023-08-04 | 2023-08-04 | AC load driving circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322095419.7U CN220492871U (en) | 2023-08-04 | 2023-08-04 | AC load driving circuit and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN220492871U true CN220492871U (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322095419.7U Active CN220492871U (en) | 2023-08-04 | 2023-08-04 | AC load driving circuit and electronic equipment |
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| CN (1) | CN220492871U (en) |
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2023
- 2023-08-04 CN CN202322095419.7U patent/CN220492871U/en active Active
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