Recent News

Introduction of regulated power adapter

Electronic devices are inseparable from the power adapter. The power adapter supplies the energy required by the electronic device, which determines the importance of the power adapter in the electronic device....…

Continue Reading

Power adapter circuit principle

High frequency power adapter According to the analysis of the internal structure of the power adapter, the power adapter use the working circuit principle of the power adapter. (1) the main circuit 1) the f...…

Continue Reading

Company News

Location:Home > News & Resources > Company News

The basic method of power supply factory shipment inspection

Date:2020-06-30 Hits:61
The basic method of power supply factory shipment inspection
Inspection is an important task in the production of power adapter manufacturers, which runs through the entire process of power adapter production.

The power adapter inspection generally includes a three-level inspection system of self-inspection, mutual inspection and full-time inspection. Usually inspection work mainly refers to full-time inspection, that is, full-time personnel from the quality management department of the power adapter manufacturer observe and compare all the raw materials, components, parts and components required by the switching power adapter up to the complete machine of the switching power adapter according to the corresponding technical documents. And judgment work.

The inspection methods of power supply include two types: full inspection and random inspection. The inspection method of the product should be determined according to the characteristics, requirements and production stages of the product. It should not only ensure the quality of the product, but also adhere to the principle of economic rationality.


Power Adapter
1. Full inspection
Full inspection is to inspect all products. Full inspection can improve the reliability of the product, but it will consume a lot of manpower and material resources, increasing the production cost of the product. Generally, only products with high reliability requirements such as military products, trial-produced products, and products produced after changes in production conditions and production processes are fully inspected.



2. Sampling
Sampling is a widely used inspection method in power adapter manufacturers.

Sampling inspection should be carried out under the premise of mature product design, process specifications, stable equipment and reliable tooling. The number of samples taken should be determined according to the base of the product to be inspected and the sampling standard in the national standard. When samples are drawn, they should not be drawn from the continuously produced products, but randomly selected from the batch of products. The results of the random inspection shall be recorded, and the failures in the random inspection products shall be judged against the relevant product failure judgment standards.


3. Judgment of test results
Power adapter failures usually include fatal defects, heavy defects and light defects. Fatal defects refer to safety defects, which are negative failures, that is, as long as there are fatal defects in the samples, the products of the random inspection batch are judged as unqualified. Heavy defects are A faults, and light defects are B faults. In the absence of fatal defects, the sampling products shall be judged to be qualified according to the number of A and B failures in the sampling samples and the sampling standards in the national standard.
The quality of the power adapter is often judged by the product qualification level (AQL). Products with different quality requirements have different quality indicators. The inspection should be determined according to the number of A and B faults allowed by the product under test under the specified AQL value.