The 5th Lichuang Electronic Design Competition#Multifunctional Adjustable Power Supply

• Note: This is a required field. [Please fill in during the registration stage↓]

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• 1. Engaged in electronic circuit design for more than 20 years

2. This project is compatible with universal conventional adjustable power supplies, chargers, adapters and other multi-functions in one. Compact and lightweight. low cost. The market has a wide range of applications: experimentation, maintenance, development, and learning. Suitable for industrial and household use.

< br> < br> [Please fill in during the competition stage↓] * 1. Describe the project details

This project is compatible with universal conventional adjustable power supplies, chargers, adapters and other multi-functions in one. small volume. low cost. The market has a wide range of applications: experimentation, maintenance, development, and learning. Suitable for industrial and household use. In addition, many functions have been expanded. Such as large current, ultra-high voltage (4 levels in series can reach about 120V), negative voltage, electronic load, soldering station, USB, TYPE-C and other functions.

< br> < br> * 2. Describe the challenges faced by the project and the problems solved

one. solved problem.

• > Face engineering developers. ****

Conventional adjustable power supplies are mostly 30V/3A or 5A. They have small current, low voltage, poor control accuracy, large power interference, and instability. No negative pressure output. No AC output, few channels and other problems. It is not suitable for applications in most industrial control, instrumentation, signal processing and other industries. Especially in applications related to motor drive and signal control. This project has great advantages in the projects that the above-mentioned conventional adjustable power supply cannot achieve and can solve related problems.

• For maintenance, after-sales service, production and debugging technicians.

This project has many attachments and strong scalability. There are more than 60 kinds of power plugs. It can be adapted to more than 95% of the electrical equipment on the market such as mobile phones, laptops, tablets, driving recorders, portable audio and video products and other daily electrical appliances. It is very convenient for maintenance and after-sales service technicians. Also equipped with a variety of output clips and wires. Combined with multi-channel positive and negative voltage power supplies, it brings a lot of convenience to production and debugging personnel.

• Scalability.

In order to solve the problem of strong compatibility and easy loss of attachments. The shell of this project is made of a drawer-type file box with reinforced A4 paper. There is a large space reserved inside to store additional power plugs and your own DIY accessories or functional circuit modules. Can also be used as a storage box. For example: adding a battery box module can be used as a mobile adjustable power supply. Compared with ordinary adjustable power supplies, this project adds USB and TYPE-C new generation communication protocol power interfaces, and is compatible with almost 20 communication power supply protocols. This is a function that most adjustable power supplies currently on the market do not have. Integrated electronic load function. Support CC, CV discharge mode. Integrated soldering iron constant temperature soldering station function. Supports the A1321 core soldering iron handle of the most versatile white light 936 soldering station. ******This project has many output interfaces, and there are 5 sets of independent isolation winding outputs inside. Users can control in parallel or series, 3 independent channels of 32V/4A, with a maximum output of 32V/10A. Or series output up to 96V/4A or 130V/1A or other combinations. It can also be combined into positive and negative pressure and power output. Used in some special occasions, such as piezoelectric valves and voice coil motor driving and debugging. ****** Each internal functional component adopts modular building block design. Can be detached and used separately. All design information is made public. Users can easily design or improve and replace related modules.

• challenges faced.

Due to its powerful and diverse functions, it is also scalable. Therefore, small size is a difficulty in design. Design related to structural heat dissipation, appearance and ergonomics. Matching of high-power inductive loads and capacitive loads. For example, 90% of the adjustable power supply motors on the market, such as hand drill motors, electric vehicle motors and high-power model aircraft motors, cannot be driven. As soon as they are driven, they will protect or directly burn the adjustable power supply. Clean and anti-interference power supply. It is easy to achieve small output ripple without load. Many manufacturers only use this indicator to display, but it is actually of no use. Only the ripple indicators under all working conditions with heavy load or inductive load have real practical value. Switching adjustable power supplies have been around for decades and have many advantages (light weight, low heat generation, low cost, small size), but why do linear adjustable power supplies still account for more than 70% of the market? The market is the only truth for testing products. Switching adjustable power supplies are a major trend in the future, and there is still a long way to go. . . . . This project is positioned to adhere to the present and look to the future. The current situation of the voltage regulator output is as follows: switching voltage regulator: adjustable 32V/4A 2 channels. +5V/3A (internally adjustable), +12V/3A (internally adjustable), USB (protocol type, maximum 12W), TYPE-C (protocol type, maximum 65W), -12V (internally adjustable), linear type Voltage stabilization: adjustable 32V/4A, single channel -5V, -10V (internally adjustable), +3.3V

  3. Describe the key points involved in the hardware and software parts of the project** Hardware: load matching, clean power supply, and anti-interference. Sampling, load capacity. Accuracy, stability. * Software: 24-bit ADC sampling. Charging and power supply protocol.

* 4. The project material list shows the 1.6-channel voltage and current display module: single-chip computer N76E003MCU (designed with dual LAYOUT STM8 and SQ2711MCU), TM7707 24-bit ADC, and TL431 reference source. 5 milliohm sampling resistor.

2. Linear voltage regulator module: LM358, LM393, LM7812, LM337, LM317.2SC5200, 1184.10 milliohm sampling resistor.

3. USB+TYPEC protocol module: IP6538AC, P55NF60, IP6505, 10 milliohm sampling resistor.

4. Soldering station soldering iron module: A1321 white light handle, LM321, LM393, PC817, P55NF60

5. Electronic load module: IRF4460, 5 milliohm sampling resistor. LM358.LM393.

6. Switching voltage regulator module: CX8571, XL4016, P55NF60, 30 milliohm sampling resistor. Power inductor.

< br> * 5. Upload project pictures

Function: 1-way adjustable regulated power supply, with CC and CV modes. Parallel mode maximum 10A/30V

1-way adjustable regulated power supply, with CC and CV modes, maximum 4A60V in series mode

1 electronic load, supporting CC/CV mode. Maximum 30A/60V

1 x 60W soldering iron station.

1. USB multi-protocol power supply and current automatic adjustment interface,

1 channel 3-21V USB protocol voltage and current automatic adjustment interface. The maximum resolution is 20MV/step.

1-way TYPE-C 3-21V USB protocol voltage and current automatic adjustment interface. The maximum resolution is 20MV/step.

   5.1. Print the contest logo picture on the PCB. Failure to do so will be regarded as giving up the competition. 5.2. Other pictures of the project*   6. Demonstrate your project and record it as a video for upload. 6.1. Upload the video to the official website of the contest. 6.2. Notes on the video title and link of Station B: ① : Video requirements: Please shoot horizontally, with a resolution of no less than 1280×720, in Mp4/Mov format, and the size of a single video is limited to 100M; ②: Video upload: Please upload to the official website of the competition and Station B simultaneously ( < u>< span class="colour" style="color: rgb(0, 0, 255);">< u>www.bilibili.com< /u>< /span>< /u> ), the TOP10 most popular projects at Station B will receive Cash rewards of 1,000-5,000 yuan, and other uploaded projects will receive a 100-yuan Lichuang Mall no-threshold coupon; ③: Video title: The 5th Lichuang Electronic Design Competition: {Project Name}-{Video Module Name}; For example, the 5th Lichuang Electronic Design Competition Chuang Electronics Design Competition: "Autonomous Driving" Project - Team Introduction.

Video of station B https://www.bilibili.com/video/BV1E54y117aR/ < br> < br> * 7. Whether it is released to the public for the first time

Yes. This is the first release.

7.1. Please indicate whether the project has been published or won awards before.

The project has not been published or won an award before.

7.2. If the project is optimized on the original basis, please explain the optimization part

There was no prototype before the project, and it was all based on experience needs.

* 8. Open source documents

Below are the PCB diagrams and schematic files of each functional module board. It is in PADS format. Relevant information is as follows:

* 9. References

** Designed by referring to the PDF specifications of each chip manufacturer. Relevant information and attachments are as follows: **