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What are the power adapter circuit debugging steps?

Issue Time:2006-03-13
It turns out that an electronic device, even if installed according to the designed circuit parameters, is often difficult to achieve the desired results. Therefore, the skills to debug electronic circuits are also essential for those engaged in the design and development of power adapters

General steps for electronic circuit debugging
Traditional Chinese medicine practitioners pay attention to "looking, smelling, asking, cutting", in fact, the same is true for debugging circuits.

First of all, "looking", that is, observing the welding of the circuit board, mature electronic products are generally welded problems;

The second "smell", huh, huh, this is not to say that the board is smelled first, but that after listening to the power board, whether the board is abnormal or not, it should not be called, the call is not called;

The third "Q", if it is the first time you debug yourself, is it not your own design to ask what is the power supply? Is it adjusted by others? Is there any problem?

The fourth "cut", the components are not welded, the chip is welded correctly, the solder joints that are difficult to observe are welded well? Generally, many problems can be found after doing these steps.

According to the complexity of the electronic circuit, debugging can be carried out step by step: for a simpler system, the debugging steps are: power supply debugging → single board debugging → joint debugging. For more complex systems, the debugging steps are: power supply debugging → single board debugging → extension debugging → host debugging → joint debugging. This will clarify three points:
1.Whether it is a simple system or a complex system, debugging starts with the power supply;
2. The debugging method is generally the first part (unit circuit) after the whole, first static and then dynamic;
3. It is usually through the repeated process of measurement → adjustment → re-measurement → re-adjustment; for complex electronic systems, debugging is also a “system integration” process.

On the basis of the completion of the unit circuit debugging, system joint debugging can be performed. For example, the data acquisition system and the control system are generally composed of an analog circuit, a digital circuit, and a microprocessor circuit. When debugging, the three parts of the circuit are often separately debugged, and after reaching the design specifications respectively, the interface circuit is added for joint debugging. The joint adjustment is to test and adjust the performance indicators of the total circuit. If the design requirements are not met, the cause should be carefully analyzed to find out the corresponding unit for adjustment. It is not excluded to adjust the parameters of multiple units or adjust multiple times, and even have the possibility of correcting the scheme.

The research and development of the power adapter is particularly important. Shenzhen United Transportation Electronics has been focusing on power products for 12 years. It has a 30-year experience R&D team, strict quality inspection, and carefully manufactures every power supply product.

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