Stable and reliable power supply circuit structure

Abstract

The utility model discloses a stable and reliable power supply circuit structure, and particularly relates to the field of power supply circuit structures, which comprises an alternating current input circuit, a rectifying circuit, a filter circuit, a voltage stabilizing circuit and a protection circuit, and is characterized in that the alternating current input circuit is responsible for converting unsafe high-voltage alternating current into safe low-voltage alternating current; the rectifying circuit is used for converting alternating-current input into direct-current output, the filtering circuit is used for smoothing rectified direct-current output and reducing voltage ripples, the voltage stabilizing circuit is used for ensuring that output voltage is kept stable when load changes and input voltage fluctuates, and the protection circuit is used for preventing the circuit from being damaged. The filter circuit is used for reducing alternating current components in pulsating direct current voltage as much as possible and retaining direct current components of the pulsating direct current voltage, so that the ripple coefficient of output voltage is reduced, the waveform becomes smooth, and a power supply step-down circuit is formed by D2, L16, U28, U13, C229, R354, R77, R66, L9, C297 and C395 and provides appropriate and reliable working voltage for U25.

Description

Technical Field

[0001] This utility model relates to the field of power supply circuit structure, and more specifically, to a stable and reliable power supply circuit structure. Background Technology

[0002] In modern electronic devices, a stable and reliable power supply is a key factor in ensuring the normal operation of the equipment. Traditional power supply circuits often have some problems, such as large voltage fluctuations, inability to effectively maintain a stable output voltage when the load changes; insufficient ability to suppress noise and interference in the power supply, which may lead to malfunctions or performance degradation of electronic devices; and low reliability of power supply circuits under some complex environmental conditions, which are prone to power outages or insufficient power supply.

[0003] Therefore, a stable and reliable power supply circuit structure is proposed to address the above problems. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiments of this utility model provide a stable and reliable power supply circuit structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stable and reliable power supply circuit structure, including an AC input circuit, a rectifier circuit, a filter circuit, a voltage regulator circuit, and a protection circuit, characterized in that the AC input circuit is responsible for converting unsafe high-voltage AC power into safe low-voltage AC power;

[0006] A rectifier circuit is used to convert AC input into DC output;

[0007] The filter circuit is used to smooth the rectified DC output and reduce voltage ripple;

[0008] A voltage regulator circuit is used to ensure that the output voltage remains stable when the load changes and the input voltage fluctuates;

[0009] Protection circuits are used to prevent circuits from being damaged by overvoltage, overcurrent, or overheating.

[0010] Preferably, the AC input circuit is a power transformer step-down circuit, which consists of a power switch, a power transformer, and rectifier diodes. The primary winding of the power transformer is connected to the AC mains power, and the secondary winding outputs a lower AC voltage, which is then converted into pulsating DC power by the rectifier diodes.

[0011] Preferably, the rectifier circuit is a bridge rectifier circuit, which has a bridge structure composed of four diodes, resulting in higher efficiency, lower output voltage ripple, and a compact circuit structure.

[0012] Preferably, the filtering circuit is an active filtering circuit, composed of passive components and active devices, powered by an external power supply, and has higher signal gain and better frequency selectivity.

[0013] Preferably, in the AC input circuit, the 12V power supply supplies power to U28 through D2 and L16, and the power supply step-down circuit is composed of U13 and peripheral circuits C229, R354, R77, R66, L9, C297, and C395 to supply power to the main control circuit.

[0014] Preferably, the voltage regulator circuit consists of a power supply step-down circuit composed of D2, L16, U28, U13, C229, R354, R77, R66, L9, C297, and C395, an external crystal oscillator composed of C63, C64, X1, and R1, and an external reset circuit composed of R259 and C9 for U25.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] Compared with the prior art, the filter circuit in this utility model is used to minimize the AC component in the pulsating DC voltage while retaining its DC component, thereby reducing the output voltage ripple coefficient and making the waveform smoother. A power supply step-down circuit composed of D2, L16, U28, U13, C229, R354, R77, R66, L9, C297, and C395 provides a suitable and reliable operating voltage to U25. Simultaneously, an external crystal oscillator is formed through C63, C64, X1, and R1, and an external reset circuit for U25 is formed through R259 and C9. In summary, the power supply circuit structure of this utility model has the advantages of small size, low cost, and stable and reliable performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the AC input circuit of this utility model.

[0019] Figure 3 This is a schematic diagram of the main control circuit structure of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] As attached Figure 1 and Figure 3 The diagram shows a stable and reliable power supply circuit structure, including an AC input circuit, a rectifier circuit, a filter circuit, a voltage regulator circuit, and a protection circuit. The AC input circuit is responsible for converting unsafe high-voltage AC power into safe low-voltage AC power.

[0023] A rectifier circuit is used to convert AC input into DC output;

[0024] The filter circuit is used to smooth the rectified DC output and reduce voltage ripple;

[0025] A voltage regulator circuit is used to ensure that the output voltage remains stable when the load changes and the input voltage fluctuates;

[0026] Protection circuits are used to prevent circuits from being damaged by overvoltage, overcurrent, or overheating.

[0027] Among them: the filter circuit is used to minimize the AC component in the pulsating DC voltage, retain its DC component, reduce the output voltage ripple coefficient, and make the waveform smoother. It is composed of D2, L16, U28, U13, C229, R354, R77, R66, L9, C297, and C395 to form a power supply step-down circuit to provide a suitable and reliable operating voltage to U25. At the same time, an external crystal oscillator is formed through C63, C64, X1, and R1, and an external reset circuit for U25 is formed through R259 and C9.

[0028] Example 2

[0029] Based on Embodiment 1, the solution in Embodiment 1 will be further described in detail below, with reference to the specific working method described in detail:

[0030] like Figure 1 and Figure 3 As shown, in a preferred embodiment, the AC input circuit is a power transformer step-down circuit, consisting of a power switch, a power transformer, and rectifier diodes. The primary winding of the power transformer is connected to the AC mains, and the secondary winding outputs a lower AC voltage, which is then converted into pulsating DC voltage by the rectifier diodes.

[0031] like Figure 1 and Figure 3 As shown, in a preferred embodiment, the rectifier circuit is a bridge rectifier circuit, which has a bridge structure composed of four diodes, resulting in higher efficiency, smaller output voltage ripple, and a compact circuit structure.

[0032] like Figure 1 and Figure 3As shown in the preferred embodiment, the filter circuit is an active filter circuit, composed of passive components and active devices, powered by an external power supply, and has higher signal gain and better frequency selectivity.

[0033] like Figure 1 and Figure 3 As shown, in a preferred embodiment, in the AC input circuit, the 12V power supply supplies power to U28 through D2 and L16, and the power supply step-down circuit composed of U13 and peripheral circuits C229, R354, R77, R66, L9, C297, and C395 supplies power to the main control circuit.

[0034] like Figure 1 and Figure 3 As shown, in a preferred embodiment, the voltage regulator circuit consists of D2, L16, U28, U13, C229, R354, R77, R66, L9, C297, and C395 forming a power supply step-down circuit; C63, C64, X1, and R1 forming an external crystal oscillator; and R259 and C9 forming a circuit for external reset of U25.

[0035] The working process of this utility model is as follows:

[0036] When this utility model is used, the filter circuit is used to minimize the AC component in the pulsating DC voltage while retaining its DC component, thereby reducing the output voltage ripple coefficient and making the waveform smoother. The power supply step-down circuit, composed of D2, L16, U28, U13, C229, R354, R77, R66, L9, C297, and C395, provides a suitable and reliable operating voltage to U25. At the same time, an external crystal oscillator is formed through C63, C64, X1, and R1, and an external reset circuit for U25 is formed through R259 and C9.

[0037] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0038] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0039] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stable and reliable power supply circuit structure comprising an AC input circuit, a rectifier circuit, a filter circuit, a voltage stabilizing circuit and a protection circuit, characterized in that, The AC input circuit is responsible for converting unsafe high-voltage AC power into safe low-voltage AC power. A rectifier circuit is used to convert AC input into DC output; The filter circuit is used to smooth the rectified DC output and reduce voltage ripple; A voltage regulator circuit is used to ensure that the output voltage remains stable when the load changes and the input voltage fluctuates; Protection circuits are used to prevent circuits from being damaged by overvoltage, overcurrent, or overheating.

2. The stable and reliable power supply circuit structure according to claim 1, characterized in that: The AC input circuit is a power transformer step-down circuit, consisting of a power switch, a power transformer, and rectifier diodes. The primary winding of the power transformer is connected to the AC mains, and the secondary winding outputs a lower AC voltage, which is then converted into pulsating DC voltage by the rectifier diodes.

3. The stable and reliable power supply circuit structure according to claim 1, characterized in that: The rectifier circuit is a bridge rectifier circuit, which consists of a bridge structure composed of four diodes. It has higher efficiency, smaller output voltage ripple, and a compact circuit structure.

4. The stable and reliable power supply circuit structure according to claim 1, characterized in that: The filtering circuit is an active filtering circuit, composed of passive components and active devices. It is powered by an external power supply and has higher signal gain and better frequency selectivity.

5. The stable and reliable power supply circuit structure according to claim 1, characterized in that: In the AC input circuit, the 12V power supply powers U28 through D2 and L16, and the power supply step-down circuit composed of U13 and peripheral circuits C229, R354, R77, R66, L9, C297, and C395 supplies power to the main control circuit.

6. The stable and reliable power supply circuit structure according to claim 1, characterized in that: The voltage regulator circuit consists of D2, L16, U28, U13, C229, R354, R77, R66, L9, C297, and C395 forming a power supply step-down circuit; C63, C64, X1, and R1 forming an external crystal oscillator; and R259 and C9 forming an external reset circuit for U25.

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