Teach you how to choose electronic equipment (02)

Teach you how to choose electronic equipment (02)

Selection criteria for meta equipment

1. Select standard meta equipment from manufacturers that have proven to be of stable quality, high reliability, promising development, and good reputation through practice. Selected or defective meta equipment cannot be selected.

2. The skills, functions, quality levels, and application conditions of meta equipment should meet the requirements of planning circuits.

3. Under the condition of satisfactory functional parameters, the components with low power consumption, low thermal resistance, low loss, high Power gain and high efficiency shall be selected.

4. Selection of domestically produced equipment. The first choice is to select meta equipment that meets the national standard and has passed certification judgment; Meta equipment that meets the requirements of testing and can be supplied safely; Other meta equipment that have successful application experience and meet the requirements.

5. Import meta equipment. The meta equipment in the PPL (Preferred Product List) and QPL (Qualified Product List) of foreign authoritative institutions; Highly reliable meta equipment selected strictly during the production process; High quality meta equipment that meets the requirements through domestic application verification.

6. Selection should follow standardized and universal guidelines.

meta equipment is preferred and should comply with the preferred product manual or the preferred product list (PPL) published by foreign authoritative institutions. Planners should develop accurate and clear skill standards for purchasing meta equipment. To ensure reliability requirements, the standards should clearly identify measures and methods for selection (including secondary selection) and quality consistency inspection. We should develop a qualified list of meta equipment purchases based on type rules.

The factors affecting the reliability and quality of the primary equipment must be clear in the purchase list, such as quality level, environmental conditions, Failure rate, skill standards, packaging methods, special requirements (anti-static characteristics, chip protection process, etc.), manufacturers, etc. The acquisition standards should be approved in accordance with the rules before implementation. After the application of meta equipment in the product is clear, its reliability should be estimated and whether the circuit meets the requirements for the reliability of meta equipment should be considered.