Nanometer waterproof switching power supply structure
By coating the switching power supply PCBA board and components with a nano-waterproof layer and optimizing the component design, the problems of insufficient waterproofness and stability of traditional switching power supplies are solved, achieving efficient waterproofing and stable power conversion in humid environments, and improving the reliability and maintenance convenience of the equipment.
Patent Information
- Application Number
- CN202422791841.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-15
AI Technical Summary
Traditional switching power supplies have weak waterproof capabilities and are difficult to adapt to humid, splashing and underwater environments, which can lead to water intrusion causing short circuits, corrosion and other problems, affecting reliability and lifespan. They also have insufficient energy control and output stability, poor heat dissipation design, and difficult maintenance.
A nano-waterproof layer is coated on the surface of the PCBA board and each module component through physical vapor deposition technology. Combined with multiple terminals, filter capacitors, common-mode inductors, rectifier diodes, transformers, switch tubes, control chips and other components, a structure with all-round waterproofness, stable power conversion and efficient heat dissipation is formed.
It achieves effective waterproofing in harsh environments, improves the reliability and stability of the switching power supply, ensures power quality and output stability, simplifies maintenance processes, and extends service life.
Smart Images
Figure CN223364395U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of switching power supplies, and in particular discloses a nano waterproof switching power supply structure. Background Art
[0002] With the increasing prevalence of electronic devices, the performance and reliability of switching power supplies face numerous challenges. Traditional switching power supplies lack water resistance, making them difficult to withstand environments such as humidity, splashing water, and underwater environments. Moisture easily penetrates the PCBA, causing short circuits and corrosion, reducing power supply reliability and lifespan, and leading to electronic device failure and damage. Traditional approaches struggle to meet the high power quality requirements of modern electronic devices in terms of energy control and output stability. Inaccurate voltage and current conversion control and low component coordination efficiency result in unstable power quality and large output fluctuations, impacting the normal operation of precision instruments and communications equipment. Heat dissipation and maintenance are also challenges. If heat generated during operation cannot be dissipated promptly, it can affect component performance and lifespan, and even cause failures. Traditional heat dissipation designs are ineffective. Furthermore, the PCBA board connections and structural design are difficult to maintain, making component removal and replacement difficult during repairs. Production efficiency and quality stability also need to be improved. Therefore, the development of nano-waterproof switching power supply structures that combine water resistance, efficient energy control, excellent heat dissipation, and ease of maintenance is urgent. Utility Model Content
[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a nano waterproof switching power supply structure.
[0004] To achieve the above objectives, the utility model provides a nano-waterproof switching power supply structure, including a PCBA board and a nano-waterproof layer provided on the PCBA board, the nano-waterproof layer tightly covering the surface of the PCBA board; the PCBA board is provided with an input module for receiving external power input, a rectifier and filter module for rectifying and filtering the input alternating current, a power conversion module for adjusting the voltage and current of the direct current input by the rectifier and filter module, a control module for controlling and adjusting the operating parameters of the switching power supply, and an output module for outputting the adjusted direct current. The components in each module are all covered with a nano-waterproof layer; the nano-waterproof layer is electroplated on the surface of the PCBA board using electroplating equipment.
[0005] By coating the PCBA surface and the components within each module with a nano-waterproof layer, specifically produced using physical vapor deposition (PVD), this layer provides comprehensive, highly effective waterproof protection for switching power supplies. PVD is a thin-film deposition technique that involves evaporating or sublimating a raw material at high temperatures, releasing its atoms or molecules. These molecules are then deposited onto the substrate to form a thin film. The fundamental principle of a nano-waterproof layer is to utilize the unique properties of nanomaterials to prevent water penetration. Nanomaterial particles are extremely small, typically ranging from 1 to 100 nanometers. When used in a waterproof layer, these nanoparticles form a dense, mesh-like structure on the surface of the protected object. The gaps within this structure are so small that water molecules (approximately 0.3 nanometers) have difficulty passing through them, achieving a waterproof effect. Furthermore, nanomaterials possess strong surface activity, allowing them to adhere well to surfaces, making the waterproof coating more robust and resistant to damage. This is like a waterproof coat composed of countless tiny, tightly packed "shields" that keep water out.
[0006] This effectively prevents moisture intrusion even in harsh environments like humid, wet, and even underwater, preventing problems like short circuits and corrosion caused by water ingress. This significantly improves the reliability and stability of the switching power supply and extends its service life. The nano-waterproof layer covers various modules on the PCBA board, such as the input module, rectifier and filter module, power conversion module, control module, and output module, ensuring that the components in each module can operate in a relatively dry and safe environment. Regardless of changes in ambient humidity or accidental splashes of water, the circuit maintains normal functionality, ensuring that the switching power supply's input, conversion, and output processes are not disrupted by moisture, continuously and stably providing the required power to the device.
[0007] Furthermore, the input module has a terminal block arranged on the PCBA board for connecting to an external power supply, a first filter capacitor for filtering out high-frequency noise of the external power supply, and a common-mode inductor for suppressing common-mode interference. The number of the terminal blocks is set to multiple, and the multiple terminal blocks form a terminal block structure. The common-mode inductor is electrically connected to the rectification and filtering module.
[0008] The terminal block structure, which consists of multiple wiring terminals, provides multiple options and flexibility for connecting to an external power supply. It can meet the connection requirements of different types of external power supplies and adapt to various application scenarios. The first filter capacitor can filter out the high-frequency noise of the external power supply, making the electrical energy input to the switching power supply purer. This reduces the interference of high-frequency noise on the circuit and improves the stability and reliability of the switching power supply. The common-mode inductor can suppress common-mode interference and has a good attenuation effect on the common-mode noise from the external power supply. This helps to improve the anti-interference ability of the switching power supply and ensure that it can operate normally even in complex electromagnetic environments. The common-mode inductor is electrically connected to the rectification and filtering module, so that the power signal after the interference is suppressed by the common-mode inductor can smoothly enter the rectification and filtering module for further processing. This connection method ensures the continuity and stability of the circuit and improves the efficiency and quality of power conversion.
[0009] Furthermore, the rectification and filtering module has a rectifier bridge arranged on the PCBA board for converting the AC power input by the input module into DC power, and a second filter capacitor for filtering the rectified DC power. The rectifier bridge is composed of multiple rectifier diodes. The rectifier bridge is electrically connected to the input module, and the second filter capacitor is electrically connected to the power conversion module.
[0010] The rectifier bridge, composed of multiple rectifier diodes, effectively converts the AC power input from the input module into DC power. The rectifier diodes have unidirectional conductivity, ensuring that current flows in only one direction, thus achieving AC-to-DC conversion. This conversion provides a stable DC power source for subsequent circuit modules, meeting the DC power requirements of various electronic devices. The second filter capacitor filters the rectified DC power, removing ripple and noise. This filtered DC power is smoother and more stable, reducing the impact of voltage fluctuations on the subsequent power conversion module and other circuit modules. The rectifier bridge is electrically connected to the input module, ensuring that the AC power can smoothly enter the rectification stage for conversion. This connection ensures that the input AC power is processed promptly, providing a stable DC power source for subsequent circuits. The second filter capacitor is electrically connected to the power conversion module, transmitting the filtered, high-quality DC power to the power conversion module, providing excellent input conditions for power conversion.
[0011] Furthermore, the power conversion module has a transformer arranged on the PCBA board for converting the voltage input by the rectifier and filter module, and a switch tube for controlling the on and off of the current. The transformer is electrically connected to the rectifier and filter module, and the switch tube is electrically connected to the control module and the output module respectively.
[0012] The transformer converts the input voltage from the rectifier and filter module to meet the specific voltage requirements of different devices. The switching transistor controls the on / off state of the current, quickly and accurately switching the circuit state according to the control module's instructions. By controlling the on and off times of the switching transistor, the output current can be precisely regulated, improving the efficiency and stability of the power supply. The switching transistor's fast response also effectively copes with load changes and input voltage fluctuations, ensuring that the output voltage remains within a stable range. The transformer is electrically connected to the rectifier and filter module, receiving rectified and filtered DC power and performing voltage conversion. This connection ensures the quality of the input power and provides a good foundation for the normal operation of the transformer. The switching transistor is electrically connected to the control module and the output module, enabling the control module to precisely control the operating state of the switching transistor, thereby regulating the output current and voltage. Furthermore, the connection between the switching transistor and the output module transmits the converted power to the load, ensuring a stable and reliable power supply to the load.
[0013] Furthermore, the control module has a control chip arranged on the PCBA board and electrically connected to the power conversion module for controlling power conversion. The control chip is electrically connected to the feedback module for receiving a feedback signal.
[0014] The control chip is electrically connected to the power conversion module and enables precise control of the power conversion process. Based on preset algorithms and parameters, the control chip monitors parameters such as input voltage and output current in real time and adjusts the operating state of the switching transistors in the power conversion module to achieve efficient and stable power conversion. This helps improve the efficiency of the switching power supply and reduce energy loss, while ensuring the stability of the output voltage and current to meet the needs of different loads. The control chip is electrically connected to the feedback module to receive feedback signals. The feedback module monitors parameters such as output voltage and current in real time and feeds this information back to the control chip. The control chip adjusts the power conversion process based on the feedback signals, forming a closed-loop control loop to ensure that the output parameters always remain within the set range. This feedback regulation mechanism improves the reliability and stability of the switching power supply and adapts to different operating environments and load changes.
[0015] Furthermore, the output module has a third filter capacitor arranged on the PCBA board for filtering the DC power input to the power conversion module and an output diode for unidirectional conduction. The third filter capacitor is electrically connected to the power conversion module.
[0016] The third filter capacitor filters the DC power input by the power conversion module, further removing ripple and noise from the DC power. The DC power after power conversion may contain some high-frequency interference components. The third filter capacitor can effectively smooth the output voltage, making the output power more stable and pure. The unidirectional conduction characteristics of the output diode prevent reverse current flow, ensuring that the direction of the output current is always correct. In some specific application scenarios, this can protect back-end equipment from damage caused by reverse current and improve system reliability and safety. The third filter capacitor is electrically connected to the power conversion module, forming a stable output circuit structure. The charge and discharge characteristics of the capacitor can act as a buffer when the load changes, reducing fluctuations in the output voltage. When the load suddenly increases or decreases, the third filter capacitor can quickly release or store electrical energy to maintain a relatively stable output voltage. This helps to improve the stability of the entire switching power supply system, enabling it to adapt to different load conditions.
[0017] Furthermore, the PCBA board is also provided with a protection module for preventing abnormal damage to the power supply. The protection module has protection elements arranged on the PCBA board for protecting the safety of the circuit. The number of protection elements is set to multiple, and the multiple protection elements are electrically connected to the input module, power conversion module, output module and control module respectively.
[0018] Multiple protection elements can be configured to protect the switching power supply from multiple perspectives. Different protection elements are designed to address specific power supply anomalies, such as overvoltage, overcurrent, overheating, and short circuits. Multiple protection elements are electrically connected to the input module, power conversion module, output module, and control module, providing comprehensive coverage of all key aspects of the switching power supply. Whether it's power supply fluctuations on the input side, load changes on the output side, or abnormalities during power conversion and control, the protection elements can promptly detect them and take appropriate protective measures.
[0019] Furthermore, the PCBA board is also provided with a feedback module for feeding back the output voltage and current signals to the control module. The feedback module has a resistor divider arranged on the PCBA board for sampling the output voltage, a reference voltage source for providing a stable standard voltage, and an operational amplifier. The operational amplifier is electrically connected to the resistor divider and the reference voltage source respectively for comparing the size of the sampled voltage and the standard voltage. The operational amplifier is electrically connected to the control module for transmitting a feedback signal comparing the size relationship between the sampled voltage and the standard voltage to the control module.
[0020] The resistor divider is used to sample the output voltage, enabling real-time acquisition of the switching power supply's output voltage value. By properly designing the resistor divider's ratio, the output voltage can be scaled down to a range suitable for the operational amplifier. This allows precise monitoring of output voltage changes, providing accurate data for subsequent feedback control. A reference voltage source provides a stable standard voltage that serves as a reference for the output voltage. This standard voltage is typically highly stable and accurate, unaffected by external environmental factors. The operational amplifier compares the sampled voltage with the standard voltage to accurately determine whether the output voltage deviates from the set value. The high gain of the operational amplifier amplifies the difference between the sampled and standard voltages, enabling detection of even minute voltage changes. By comparing the sampled and standard voltages, the operational amplifier generates a feedback signal reflecting the degree of deviation between the output voltage and the set value. The operational amplifier is electrically connected to the control module and transmits the feedback signal, which compares the sampled and standard voltages, to the control module. Based on this feedback signal, the control module adjusts the operating state of the power conversion module to achieve stable output voltage control. Thanks to the feedback module, the switching power supply can automatically adjust its output to maintain output voltage stability in response to load changes and input voltage fluctuations.
[0021] Furthermore, the nano waterproof switching power supply structure also includes a base plate for installing the PCBA board and a shell installed on the base plate for protecting the PCBA board. The base plate and the shell are arranged to form a space for accommodating the PCBA board. The shell is provided with heat dissipation holes for dissipating heat from the PCBA board. The number of heat dissipation holes is set to multiple, and the multiple heat dissipation holes form a mesh structure.
[0022] The baseplate is used to mount the PCBA and provide stable support. The baseplate can be made of materials with excellent insulation and mechanical strength to ensure that the PCBA will not loosen or be damaged by vibration or external forces during use. Furthermore, the housing mounted on the baseplate further protects the PCBA from physical impact, dust, and other contaminants. The space created by the baseplate and housing provides a relatively closed environment for the PCBA, reducing the impact of external environmental factors. The housing is equipped with multiple heat dissipation holes, forming a mesh structure that effectively dissipates heat from the PCBA. This mesh structure increases the heat dissipation area and improves heat dissipation efficiency. This design ensures that the switching power supply maintains good heat dissipation even under high loads or for long periods of time, preventing failures caused by overheating.
[0023] Furthermore, any component provided on the PCBA board is connected to the PCBA board by welding.
[0024] Soldering is a very strong connection method that ensures a reliable electrical connection between any component on a PCBA and the board itself. During the soldering process, the solder fuses fully with the component pins and the pads on the PCBA, forming a stable intermetallic compound that ensures smooth current flow between the component and the PCBA. This reliable electrical connection reduces contact resistance, signal loss, and energy dissipation, improving circuit performance and stability. Soldered connections can withstand mechanical stress and vibration, resisting loosening or peeling. This is crucial for devices like switching power supplies, which may operate in a variety of environments, ensuring that components on the PCBA maintain a good connection over long periods of use.
[0025] The beneficial effects of this utility model are: excellent waterproof performance and reliability, all-round protection of the nano waterproof layer, waterproof and moisture-proof, preventing short-circuit corrosion, improving reliability and stability, the bottom plate and shell ensure the safety of the PCBA board and reduce external interference; efficient energy control and stable output, precise voltage and current conversion control, transformers, switching tubes, etc. work together to ensure power quality and stable output, intelligent control of the control chip, and precise monitoring and adjustment of the feedback module; convenient heat dissipation and maintenance, the mesh heat dissipation holes efficiently dissipate heat, prevent overheating, maintain good working condition, and the welding connection is firm and easy to produce and repair. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a schematic diagram of the overall structure of a nano waterproof switching power supply structure of the utility model;
[0027] Figure 2 This is a schematic diagram of the structure of each module on the PCBA board of the present invention;
[0028] Figure 3 This is a schematic diagram of the structure of the components on the PCBA board of the present invention;
[0029] Figure 4 It is a cross-sectional schematic diagram of the nano waterproof layer of the present invention.
[0030] The accompanying drawings include: 1. base plate; 2. outer shell; 21. heat dissipation hole; 3. PCBA board; 31. input module; 311. terminal block; 312. first filter capacitor; 313. common-mode inductor; 32. rectification and filtering module; 321. rectifier bridge; 322. second filter capacitor; 33. power conversion module; 331. transformer; 332. switch tube; 34. control module; 341. control chip; 35. feedback module; 351. resistor divider; 352. reference voltage source; 353. operational amplifier; 36. output module; 361. third filter capacitor; 362. output diode; 37. protection module; 371. protection element; 4. nano waterproof layer. DETAILED DESCRIPTION
[0031] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.
[0032] See also Figures 1 to 4 As shown, the utility model provides a nano-waterproof switching power supply structure, including a PCBA board 3 and a nano-waterproof layer 4 provided on the PCBA board 3, wherein the nano-waterproof layer 4 is tightly coated on the surface of the PCBA board 3; the PCBA board 3 is provided with an input module 31 for receiving external power input, a rectifier and filter module 32 for rectifying and filtering the input alternating current, a power conversion module 33 for adjusting the voltage and current of the direct current input by the rectifier and filter module 32, a control module 34 for controlling and adjusting the operating parameters of the switching power supply, and an output module 36 for outputting the regulated direct current. The components in each module are all coated with the nano-waterproof layer 4; the nano-waterproof layer 4 is electroplated on the surface of the PCBA board 3 using electroplating equipment.
[0033] In actual use, the surface of the PCBA board 3 and the components in each module are coated with a nano-waterproof layer 4. The nano-waterproof layer 4 is specifically prepared by physical vapor deposition. The nano-waterproof layer 4 prepared by physical vapor deposition can provide all-round and efficient waterproof protection for the switching power supply. This allows the switching power supply to effectively prevent moisture intrusion even in harsh environments such as humid, water-rich, and even underwater, avoiding problems such as short circuits and corrosion caused by water ingress, thereby significantly improving the reliability and stability of the switching power supply and extending its service life. For each module on the PCBA board 3, such as the input module 31, the rectification and filtering module 32, the power conversion module 33, the control module 34, and the output module 36, the coating of the nano-waterproof layer 4 ensures that the components in each module can operate in a relatively dry and safe environment. Regardless of how the external humidity changes or if there is an accidental splash of water, the normal function of the circuit can be maintained, ensuring that the input, conversion, output and other work processes of the switching power supply are not interfered with by moisture, and continuously and stably providing the required power to the device.
[0034] Specifically, the input module 31 has a terminal 311 arranged on the PCBA board 3 for connecting to an external power supply, a first filter capacitor 312 for filtering out high-frequency noise of the external power supply, and a common-mode inductor 312 for suppressing common-mode interference. The number of terminal blocks 311 is set to multiple, and multiple terminal blocks 311 form a terminal block structure. The common-mode inductor 312 is electrically connected to the rectification and filtering module 32.
[0035] In actual use, multiple wiring terminals 311 form a wiring seat structure, which provides multiple options and flexibility for connecting to an external power supply. It can meet the connection requirements of different types of external power supplies and adapt to various application scenarios. The first filter capacitor 312 can filter out the high-frequency noise of the external power supply, making the electric energy input to the switching power supply purer. It reduces the interference of high-frequency noise on the circuit and improves the stability and reliability of the switching power supply. The common-mode inductor 313 can suppress common-mode interference and has a good attenuation effect on the common-mode noise from the external power supply. This helps to improve the anti-interference ability of the switching power supply and ensure that it can work normally in a complex electromagnetic environment. The common-mode inductor 313 is electrically connected to the rectification and filtering module 32, so that the power signal after the interference is suppressed by the common-mode inductor 313 can smoothly enter the rectification and filtering module 32 for further processing. This connection method ensures the continuity and stability of the circuit and improves the efficiency and quality of power conversion.
[0036] Specifically, the rectification and filtering module 32 has a rectifier bridge 321 arranged on the PCBA board 3 for converting the alternating current input by the input module 31 into direct current, and a second filter capacitor 322 for filtering the rectified direct current. The rectifier bridge 321 is composed of multiple rectifier diodes. The rectifier bridge 321 is electrically connected to the input module 31, and the second filter capacitor 322 is electrically connected to the power conversion module 33.
[0037] In actual use, the rectifier bridge 321 is composed of multiple rectifier diodes, which can effectively convert the AC power input by the input module 31 into DC power. The rectifier diodes have unidirectional conductivity, ensuring that current can only flow in one direction, thereby achieving the conversion of AC power to DC power. This conversion provides a stable DC power supply for subsequent circuit modules, meeting the DC power requirements of various electronic devices. The second filter capacitor 322 filters the rectified DC power, removing ripple and noise in the DC power. The filtered DC power is smoother and more stable, reducing the impact of voltage fluctuations on the subsequent power conversion module 33 and other circuit modules. The rectifier bridge 321 is electrically connected to the input module 31, ensuring that the AC power can smoothly enter the rectification link for conversion. This connection method ensures that the input AC power can be processed in a timely manner, providing a stable DC power supply foundation for subsequent circuits. The second filter capacitor 322 is electrically connected to the power conversion module 33, transmitting the filtered high-quality DC power to the power conversion module 33, providing it with good input conditions for power conversion.
[0038] Specifically, the power conversion module 33 has a transformer 331 arranged on the PCBA board 3 for converting the voltage input by the rectification and filtering module 32, and a switch tube 332 for controlling the on and off of the current. The transformer 331 is electrically connected to the rectification and filtering module 32, and the switch tube 332 is electrically connected to the control module 34 and the output module 36 respectively.
[0039] In actual use, transformer 331 converts the voltage input from rectification and filtering module 32 to meet the specific voltage requirements of different devices. Switching tube 332 controls the on / off state of the current, quickly and accurately switching the circuit state according to instructions from control module 34. By controlling the on and off times of switching tube 332, the output current can be precisely regulated, improving the efficiency and stability of the power supply. The fast response characteristics of switching tube 332 can also effectively cope with load changes and input voltage fluctuations, ensuring that the output voltage remains within a stable range. Transformer 331 is electrically connected to rectification and filtering module 32, receives rectified and filtered DC power, and performs voltage conversion. This connection method ensures the quality of the input power and provides a good foundation for the normal operation of transformer 331. Switching tube 332 is electrically connected to control module 34 and output module 36 respectively, allowing control module 34 to accurately control the operating state of switching tube 332, thereby regulating the output current and voltage. At the same time, the connection between the switch tube 332 and the output module 36 transmits the electric energy after power conversion to the load, ensuring that the load can obtain a stable and reliable power supply.
[0040] Specifically, the control module 34 includes a control chip 341 disposed on the PCBA board 3 and electrically connected to the power conversion module 33 for controlling power conversion. The control chip 341 is electrically connected to the feedback module 35 for receiving a feedback signal.
[0041] In actual use, the control chip 341 is electrically connected to the power conversion module 33 and can precisely control the power conversion process. The control chip 341 can monitor parameters such as input voltage and output current in real time according to preset algorithms and parameters, and adjust the operating state of the switch tube 332 in the power conversion module 33 to achieve efficient and stable power conversion. This helps to improve the efficiency of the switching power supply, reduce energy loss, and at the same time ensure the stability of the output voltage and current to meet the needs of different loads. The control chip 341 is electrically connected to the feedback module 35 for receiving feedback signals. The feedback module 35 can monitor parameters such as output voltage and current in real time and feed this information back to the control chip 341. The control chip 341 adjusts the power conversion process according to the feedback signal to form a closed-loop control, thereby ensuring that the output parameters always remain within the set range. This feedback regulation mechanism can improve the reliability and stability of the switching power supply and adapt to different working environments and load changes.
[0042] Specifically, the output module 36 has a third filter capacitor 361 arranged on the PCBA board 3 for filtering the DC power input to the power conversion module 33, and an output diode 362 for unidirectional conduction. The third filter capacitor 361 is electrically connected to the power conversion module 33.
[0043] In actual use, the third filter capacitor 361 filters the direct current input by the power conversion module 33, which can further remove ripple and noise in the direct current. The direct current after power conversion may contain some high-frequency interference components. The third filter capacitor 361 can effectively smooth the output voltage, making the output power more stable and pure. The unidirectional conduction characteristic of the output diode 362 can prevent the current from flowing in the opposite direction, ensuring that the direction of the output current is always correct. In some specific application scenarios, this can protect the back-end equipment from damage by reverse current and improve the reliability and safety of the system. The third filter capacitor 361 is electrically connected to the power conversion module 33 to form a stable output circuit structure. The charge and discharge characteristics of the capacitor can act as a buffer when the load changes, reducing the fluctuation of the output voltage. When the load suddenly increases or decreases, the third filter capacitor 361 can quickly release or store electrical energy to keep the output voltage relatively stable. This helps to improve the stability of the entire switching power supply system, enabling it to adapt to different load conditions.
[0044] Specifically, the PCBA board 3 is also provided with a protection module 37 for preventing abnormal damage to the power supply. The protection module 37 has a protection element 371 arranged on the PCBA board 3 for protecting the circuit safety. The number of protection elements 371 is set to multiple, and the multiple protection elements 371 are respectively electrically connected to the input module 31, the power conversion module 33, the output module 36 and the control module 34.
[0045] In actual use, the number of protection elements 371 is set to multiple, which can protect the switching power supply from multiple aspects. Different protection elements 371 can be used to respond to different types of power supply anomalies, such as overvoltage, overcurrent, overheating, short circuit, etc. Multiple protection elements 371 are electrically connected to the input module 31, power conversion module 33, output module 36, and control module 34, respectively, to achieve comprehensive coverage of all key links in the switching power supply. Whether it is power supply fluctuations on the input side, load changes on the output side, or abnormal conditions during power conversion and control, they can all be detected in a timely manner by the protection elements 371 and corresponding protective measures can be taken.
[0046] Specifically, the PCBA board 3 is also provided with a feedback module 35 for feeding back the output voltage and current signals to the control module 34. The feedback module 35 has a resistor divider 351 arranged on the PCBA board 3 for sampling the output voltage, a reference voltage source 352 for providing a stable standard voltage, and an operational amplifier 353. The operational amplifier 353 is electrically connected to the resistor divider 351 and the reference voltage source 352 respectively for comparing the size of the sampled voltage and the standard voltage. The operational amplifier 353 is electrically connected to the control module 34 for transmitting the feedback signal of the comparison of the size relationship between the sampled voltage and the standard voltage to the control module 34.
[0047] In actual use, resistor divider 351 is used to sample the output voltage, enabling real-time acquisition of the switching power supply's output voltage value. By properly designing the ratio of resistor divider 351, the output voltage can be scaled down to a range suitable for processing by operational amplifier 353. This allows precise monitoring of output voltage changes, providing accurate data for subsequent feedback control. Reference voltage source 352 provides a stable standard voltage that serves as a reference for the output voltage. This standard voltage typically has high stability and accuracy and is unaffected by external environmental factors. Operational amplifier 353 compares the sampled voltage with the standard voltage to accurately determine whether the output voltage deviates from the set value. The high gain characteristic of operational amplifier 353 amplifies the difference between the sampled voltage and the standard voltage, enabling even small voltage changes to be detected. By comparing the sampled voltage with the standard voltage, operational amplifier 353 generates a feedback signal reflecting the degree of deviation between the output voltage and the set value. Operational amplifier 353 is electrically connected to control module 34 and transmits the feedback signal, which compares the sampled voltage with the standard voltage, to control module 34. The control module 34 adjusts the operating state of the power conversion module 33 based on this feedback signal to achieve stable control of the output voltage. Due to the presence of the feedback module 35, the switching power supply can automatically adjust the output in the event of load changes, input voltage fluctuations, etc., to maintain the stability of the output voltage.
[0048] Specifically, the nano waterproof switching power supply structure also includes a base plate 1 for installing a PCBA board 3, and a shell 2 installed on the base plate 1 for protecting the PCBA board 3. The base plate 1 and the shell 2 are arranged to form a space for accommodating the PCBA board 3. The shell 2 is provided with heat dissipation holes 21 for dissipating heat for the PCBA board 3. The number of the heat dissipation holes 21 is set to multiple, and the multiple heat dissipation holes 21 form a mesh structure.
[0049] In actual use, the base plate 1 is used to mount the PCBA board 3, providing stable support for the board. The base plate 1 can be made of a material with excellent insulation properties and mechanical strength to ensure that the PCBA board 3 will not loosen or be damaged by vibration or external forces during use. Furthermore, the housing 2 mounted on the base plate 1 further protects the PCBA board 3 from external physical impact, dust, and other contaminants. The space formed by the base plate 1 and the housing 2 provides a relatively closed environment for the PCBA board 3, reducing the impact of external environmental factors on the PCBA board 3. The housing 2 is provided with multiple heat dissipation holes 21, which form a mesh structure that effectively dissipates heat from the PCBA board 3. The mesh structure of the multiple heat dissipation holes 21 increases the heat dissipation area and improves heat dissipation efficiency. This design ensures that the switching power supply maintains good heat dissipation performance even under high loads or long operating times, preventing malfunctions caused by overheating.
[0050] Specifically, any component provided on the PCBA board 3 is connected to the PCBA board 3 by welding.
[0051] In actual use, welding is a very strong connection method that can ensure a reliable electrical connection between any component on the PCBA board 3 and the PCBA board 3. During the welding process, the solder will fully fuse with the pins of the component and the pads on the PCBA board 3, forming a stable intermetallic compound, thereby ensuring that current can flow smoothly between the component and the PCBA board 3. This reliable electrical connection can reduce contact resistance, reduce signal loss and energy loss, and improve the performance and stability of the circuit. The welded connection can withstand certain mechanical stress and vibration and is not easy to loosen or fall off. This is very important for switching power supplies, which may operate in various environments. It can ensure that the components on the PCBA board 3 always maintain a good connection during long-term use.
[0052] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.
Claims
1. A nano waterproof switching power supply structure, characterized by: The invention comprises a PCBA board (3) and a nano waterproof layer (4) arranged on the PCBA board (3), wherein the nano waterproof layer (4) is tightly coated on the surface of the PCBA board (3); the PCBA board (3) is provided with an input module (31) for receiving external power input, a rectification and filtering module (32) for rectifying and filtering the input alternating current, a power conversion module (33) for adjusting the voltage and current of the direct current input by the rectification and filtering module (32), a control module (34) for controlling and adjusting the operating parameters of the switching power supply, and an output module (36) for outputting the adjusted direct current, and the components in each module are all coated with the nano waterproof layer (4); the nano waterproof layer (4) is electroplated on the surface of the PCBA board (3) using electroplating equipment.
2. The nano waterproof switching power supply structure according to claim 1, characterized in that: The input module (31) comprises a wiring terminal (311) arranged on a PCBA board (3) for connecting to an external power supply, a first filter capacitor (312) for filtering high-frequency noise of the external power supply, and a common-mode inductor (313) for suppressing common-mode interference. The number of the wiring terminals (311) is set to be multiple, and the multiple wiring terminals (311) form a wiring seat structure. The common-mode inductor (313) is electrically connected to the rectification and filtering module (32).
3. The nano waterproof switching power supply structure according to claim 1, characterized in that: The rectifier and filter module (32) comprises a rectifier bridge (321) arranged on a PCBA board (3) for converting the alternating current input by the input module (31) into direct current, and a second filter capacitor (322) for filtering the rectified direct current. The rectifier bridge (321) is composed of a plurality of rectifier diodes. The rectifier bridge (321) is electrically connected to the input module (31), and the second filter capacitor (322) is electrically connected to the power conversion module (33).
4. The nano waterproof switching power supply structure according to claim 1, characterized in that: The power conversion module (33) comprises a transformer (331) arranged on a PCBA board (3) for converting a voltage inputted by the rectification and filtering module (32), and a switch tube (332) for controlling the on-off of the current. The transformer (331) is electrically connected to the rectification and filtering module (32), and the switch tube (332) is electrically connected to the control module (34) and the output module (36), respectively.
5. The nano waterproof switching power supply structure according to claim 1, characterized in that: The control module (34) comprises a control chip (341) arranged on the PCBA board (3) and electrically connected to the power conversion module (33) for controlling power conversion. The control chip (341) is electrically connected to the feedback module (35) for receiving feedback signals.
6. The nano waterproof switching power supply structure according to claim 1, characterized in that: The output module (36) comprises a third filter capacitor (361) arranged on the PCBA board (3) for filtering the direct current input to the power conversion module (33), and an output diode (362) for unidirectional conduction. The third filter capacitor (361) is electrically connected to the power conversion module (33).
7. The nano waterproof switching power supply structure according to claim 1, characterized in that: The PCBA board (3) is also provided with a protection module (37) for preventing abnormal damage to the power supply. The protection module (37) has a protection element (371) provided on the PCBA board (3) for protecting the circuit safety. The number of the protection elements (371) is set to be multiple, and the multiple protection elements (371) are respectively electrically connected to the input module (31), the power conversion module (33), the output module (36), and the control module (34).
8. The nano waterproof switching power supply structure according to claim 1, characterized in that: The PCBA board (3) is also provided with a feedback module (35) for feeding back output voltage and current signals to the control module (34). The feedback module (35) comprises a resistor divider (351) provided on the PCBA board (3) for sampling the output voltage, a reference voltage source (352) for providing a stable standard voltage, and an operational amplifier (353). The operational amplifier (353) is electrically connected to the resistor divider (351) and the reference voltage source (352) for comparing the magnitudes of the sampled voltage and the standard voltage. The operational amplifier (353) is electrically connected to the control module (34) for transmitting a feedback signal for comparing the magnitudes of the sampled voltage and the standard voltage to the control module (34).
9. The nano waterproof switching power supply structure according to claim 1, characterized in that: The nano waterproof switching power supply structure further comprises a base plate (1) for mounting a PCBA board (3), and a housing (2) mounted on the base plate (1) for protecting the PCBA board (3). The base plate (1) and the housing (2) are arranged to form a space for accommodating the PCBA board (3). The housing (2) is provided with heat dissipation holes (21) for dissipating heat from the PCBA board (3). The number of the heat dissipation holes (21) is set to be multiple, and the multiple heat dissipation holes (21) form a mesh structure.
10. A nano waterproof switching power supply structure according to any one of claims 2 to 7, characterized in that: Any component provided on the PCBA board (3) is connected to the PCBA board (3) by welding.