Power supply link power supply device

Abstract

According to the power supply device of the power supply link provided by the utility model, ripples of an input power supply are effectively reduced through the filtering module, the stability of an output direct current voltage is ensured, and adverse effects on a system caused by voltage fluctuation are avoided, especially under the conditions of startup and large load fluctuation. The detection time-delay module can start the voltage conversion module in a time-delay manner after the voltage of the main power supply rises to a stable value, thereby preventing the voltage conversion module from being started when the voltage of the power supply is unstable, and preventing the impact of instantaneous large current on the power supply and terminal equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a power supply device for a power supply link. Background Art

[0002] In modern electronic devices, a stable power supply is crucial to the proper operation of the entire system. In devices requiring high precision and stability, power instability can cause unforeseen failures or errors. Traditional power supply designs typically use filter capacitors to reduce power ripple, and DC-DC converter circuits to achieve voltage conversion. However, during startup, because the power supply voltage is not yet fully stable, directly starting the DC-DC circuit can result in transient high currents, affecting the stability of the power supply circuit and even damaging the power supply module or end device. To avoid these problems, it is often necessary to delay starting the DC-DC circuit after the power supply voltage stabilizes, allowing the system to safely power itself in a stable state.

[0003] While existing power supply circuits offer filtering and DC-DC conversion capabilities, they often lack effective delay mechanisms or have complex delay circuit designs, impacting overall system efficiency. To address these issues, the present invention proposes a power supply circuit with filtering, detection delay, and voltage conversion capabilities. This circuit ensures that the DC-DC converter circuit is activated after the main power supply voltage stabilizes, thereby providing a stable and reliable power supply for terminal devices. Utility Model Content

[0004] The utility model provides a power supply device for a power supply link, which is used to solve the defects in the prior art and realize the stability of the output direct current voltage.

[0005] The utility model provides a power supply device for a power supply link, comprising:

[0006] Filter module, detection delay module and voltage conversion module;

[0007] The filtering module is used to reduce the ripple of the power supply and output a DC voltage to the detection delay module;

[0008] The detection delay module is used to output the DC voltage to the voltage conversion module when the DC voltage is stable;

[0009] The voltage conversion module is used to convert the DC voltage into a target supply voltage;

[0010] The output end of the filtering module is connected to the input end of the detection delay module, and the output end of the detection delay module is connected to the input end of the voltage conversion module.

[0011] According to a power link power supply device provided by the utility model, the filtering module includes a filtering capacitor for storing and releasing electric energy to reduce power ripple and provide a stable DC voltage.

[0012] According to a power link power supply device provided by the utility model, the detection delay module includes a delay capacitor and a delay resistor. The delay capacitor is charged through the delay resistor. When the voltage of the delay capacitor reaches a set value, the detection delay module outputs a signal to turn on the voltage conversion module.

[0013] According to a power link power supply device provided by the utility model, the detection delay module further includes at least one diode and at least one transistor, the diode is used for voltage detection, and the transistor is used for controlling the delayed output signal.

[0014] According to a power supply link device provided by the utility model, the diode is a Zener diode, which is used to turn on the transistor when the voltage across the delay capacitor reaches a preset value.

[0015] According to a power link power supply device provided by the present invention, the voltage conversion module is a DC-DC converter.

[0016] According to a power link power supply device provided by the present invention, the DC-DC converter includes an integrated chip, which is used to convert an input high voltage into a low voltage and also includes an internal feedback circuit to adjust the stability of the output voltage.

[0017] According to a power link power supply device provided by the utility model, the target power supply voltage output by the DC-DC converter is 5V, which is used to power the conference host and terminal circuits.

[0018] This power link power supply device utilizes a filtering module to effectively reduce input power ripple, ensuring stable DC output voltage and preventing adverse system effects from voltage fluctuations, particularly during startup and load fluctuations. A detection delay module delays the activation of the voltage conversion module after the main power supply voltage reaches a stable value, preventing it from activating when the power supply voltage is unstable and preventing transient high current shocks to the power supply and terminal devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a module diagram of the power link power supply device provided by the utility model;

[0021] Figure 2 It is a specific circuit diagram of the power link power supply device provided by the utility model. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In order to solve the problems in the prior art, the present invention proposes a power supply link device to achieve stable output DC voltage. The power supply link device is described below. Figure 1 As shown, including but not limited to the following modules:

[0024] Filter module, detection delay module and voltage conversion module;

[0025] The filtering module is used to reduce the ripple of the power supply and output a DC voltage to the detection delay module;

[0026] The detection delay module is used to output the DC voltage to the voltage conversion module when the DC voltage is stable;

[0027] The voltage conversion module is used to convert the DC voltage into a target supply voltage;

[0028] The output end of the filtering module is connected to the input end of the detection delay module, and the output end of the detection delay module is connected to the input end of the voltage conversion module.

[0029] like Figure 2 As shown, the power supply circuit in this embodiment mainly includes the following three parts:

[0030] Filter module: It consists of capacitor C3 (220µF) and is used to filter the input +36V power supply, reduce the power supply ripple, and output a stable DC voltage to the detection delay module.

[0031] Detection Delay Module: This module primarily consists of resistor R7 (100kΩ) and capacitor C5 (47µF). When the +36V DC input voltage arrives, C5 charges through R7. When the voltage across C5 reaches approximately 20.7V, diode D3 (20V Zener diode) turns on, triggering transistor Q2 (2N3904) to turn on, which in turn controls transistor Q1 (2N3906) and outputs a high-level signal to the DC-DC converter's enable pin, EN, thereby activating the voltage conversion module.

[0032] Voltage Conversion Module: In this embodiment, the voltage conversion module uses a DC-DC converter U1 (SCT2603) to convert the input +36V voltage into a +5V DC voltage. The output inductor L1 (4.7µH) and output capacitor C4 (47µF) in the DC-DC circuit smooth the output voltage, ensuring a stable +5V voltage for the terminal circuit.

[0033] When the system is shut down, the presence of D2 can quickly discharge the delay capacitor C5 to prepare for the next startup. This diode can effectively prevent the capacitor from retaining charge after the system is powered off, which would affect the normal operation of the next startup.

[0034] As an optional embodiment, the filtering module includes a filtering capacitor for storing and releasing electrical energy to reduce power ripple and provide a stable DC voltage.

[0035] As an optional embodiment, the filtering module includes a 220µF filter capacitor C3 connected between the power input and ground. This filter capacitor is used to store and release electrical energy to reduce power ripple. Specifically, when the AC-DC power converter outputs voltage, capacitor C3 absorbs the high-frequency components of the power supply, suppressing the input power ripple, thereby providing a smooth DC voltage output. Capacitor C3 has a sufficiently large capacity to effectively handle transient voltage fluctuations in the input power supply, ensuring a stable DC voltage during system startup and operation.

[0036] As an optional embodiment, the detection delay module includes a delay capacitor and a delay resistor. The delay capacitor is charged through the delay resistor. When the voltage of the delay capacitor reaches a set value, the detection delay module outputs a signal to turn on the voltage conversion module.

[0037] As an optional embodiment, the detection delay module includes a 47µF delay capacitor C5 and a 100kΩ delay resistor R7. When the system starts up, the +36V DC voltage output by the AC-DC power supply passes through the filter module and is then transferred to the detection delay module. Delay capacitor C5 is slowly charged through delay resistor R7. Due to the capacitor's charging characteristics, the voltage on C5 gradually rises over time. When the voltage on C5 reaches a set value (e.g., 20.7V), the detection delay module outputs a signal, which controls the start-up timing of the voltage conversion module. This delay ensures that the DC-DC circuit starts only after the input voltage stabilizes, preventing transient current surges.

[0038] As an optional embodiment, the detection delay module further includes at least one diode and at least one transistor, the diode is used for voltage detection, and the transistor is used for controlling the delayed output signal.

[0039] As an optional embodiment, the detection delay module also includes at least one diode D3 (20V Zener diode) and at least one transistor Q1 and Q2 (2N3906 and 2N3904). Diode D3 is used for voltage detection. When the voltage across delay capacitor C5 reaches 20.7V, D3 turns on, triggering a base current in transistor Q2, which in turn turns on Q2. Transistor Q1 further controls the output signal. When Q2 turns on, the base of Q1 is pulled low through resistor R8, turning on Q1 and outputting a high-level signal to the enable pin of the DC-DC converter module, activating the DC-DC circuit. This design ensures that the detection delay module can accurately control the activation of the voltage conversion module when the voltage reaches the preset value.

[0040] As an optional embodiment, the diode is a Zener diode, which is used to turn on the transistor when the voltage across the delay capacitor reaches a preset value.

[0041] As an optional embodiment, the diode is a 20V Zener diode D3, which is used to turn on the transistor when the voltage across delay capacitor C5 reaches a preset value. Specifically, the Zener diode has a breakdown voltage of 20V. When the voltage across C5 rises to this value, the Zener diode reversely breaks down and begins to conduct, transferring current to the base of transistor Q2, turning on Q2 and thus controlling the entire delay process. This design ensures circuit reliability and accuracy, preventing premature or late startup of the voltage conversion module.

[0042] As an optional embodiment, the voltage conversion module is a DC-DC converter.

[0043] As an optional embodiment, the voltage conversion module is a DC-DC converter U1 (SCT2603), which is used to convert the input +36V DC voltage to the target supply voltage. The DC-DC converter in this embodiment uses the integrated chip U1 to achieve efficient voltage conversion, converting high input voltage into a lower, stable output voltage for use in the terminal circuit.

[0044] As an optional embodiment, the DC-DC converter includes an integrated chip, which is used to convert an input high voltage into a low voltage and also includes an internal feedback circuit to adjust the stability of the output voltage.

[0045] As an optional embodiment, the DC-DC converter includes an integrated chip U1 (SCT2603), which can step down the input +36V voltage to +5V and also includes an internal feedback circuit to regulate the output voltage stability. This feedback circuit adjusts the output voltage in real time based on changes in the terminal voltage, ensuring that the output voltage remains stable at around 5V. This integrated chip reduces the complexity of external circuit design and improves the system's power conversion efficiency and stability.

[0046] As an optional embodiment, the target power supply voltage output by the DC-DC converter is 5V, which is used to power the conference host and terminal circuits.

[0047] As an optional embodiment, the DC-DC converter's target supply voltage is +5V, used to power the conference host and terminal circuits. The DC-DC converter module converts the input +36V DC voltage into a stable +5V voltage, providing a stable and reliable power supply for the system's core circuits and terminal devices. This design is suitable for applications requiring low-voltage power, such as conference systems and communications equipment.

[0048] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A power supply device for a power link, characterized in that: include: Filter module, detection delay module and voltage conversion module; The filtering module is used to reduce the ripple of the power supply and output a DC voltage to the detection delay module; The detection delay module is used to output the DC voltage to the voltage conversion module when the DC voltage is stable; The voltage conversion module is used to convert the DC voltage into a target supply voltage; The output end of the filtering module is connected to the input end of the detection delay module, and the output end of the detection delay module is connected to the input end of the voltage conversion module.

2. The power supply link device according to claim 1, characterized in that: The filter module includes a filter capacitor for storing and releasing electrical energy to reduce power ripple and provide a stable DC voltage.

3. The power supply link device according to claim 2, characterized in that: The detection delay module includes a delay capacitor and a delay resistor. The delay capacitor is charged through the delay resistor. When the voltage of the delay capacitor reaches a set value, the detection delay module outputs a signal to start the voltage conversion module.

4. The power supply link device according to claim 3, characterized in that: The detection delay module further includes at least one diode and at least one transistor, wherein the diode is used for voltage detection and the transistor is used for controlling the delayed output signal.

5. The power supply link device according to claim 4, characterized in that: The diode is a Zener diode, which is used to turn on the transistor when the voltage across the delay capacitor reaches a preset value.

6. The power supply link device according to claim 5, characterized in that: The voltage conversion module is a DC-DC converter.

7. The power supply link device according to claim 6, characterized in that: The DC-DC converter includes an integrated chip, which is used to convert an input high voltage into a low voltage and also includes an internal feedback circuit to adjust the stability of the output voltage.

8. The power supply link device according to claim 7, characterized in that: The target supply voltage output by the DC-DC converter is 5V, which is used to power the conference host and terminal circuits.

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