Power supply has always been a widely used device in various industries. As consumers become more and more picky, power supply manufacturers make more efforts to improve the quality and performance of their products. In addition, for Chinese-designed and manufactured power supplies to gain an edge in the international market, companies need to further master core technologies.

 

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Power supply testing also faces opportunities and challenges. In terms of indicators and functions, for example, the power supply topology becomes more and more complex, and the signal relationship to be tested becomes more and more complex. The efficiency of power supply is more and more high, which makes the measurement of switching loss and inductance loss become very urgent. For example, more attention is paid to the indicators of power transient characteristics, and higher requirements are required for the accuracy and performance of test equipment.

In addition to the challenges of indicators and functions, testing also faces the challenges of product cost reduction and accelerated update iteration. Test efficiency, degree of automation, rapid change of model and reduction of test cost need to be considered.

Digital power supply is a new power supply technology which realizes the control, protection loop and communication interface of power supply by digital means. Programmable, responsive and digital loop control are three main characteristics of digital power supply.

The difference between digital power supply and analog power supply mainly focuses on the control and communication part. This is one of the biggest differences in emphasis between digital power testing and traditional power testing. Because the digital power supply is more flexible, so the requirements of the digital power supply test system are higher, the test system needs to have the ability to test all the functions of the digital power supply.

As for the test of the integrity and reliability of the power supply, we should pay more attention to the noise test of the power supply, and pay more attention to the transient characteristics of the power supply. In the reliability test, tolerance analysis of the power supply is an important aspect of the test. There are several main indicators that engineers should consider when selecting a power supply: voltage, load, voltage ripple and the condition of the power supply in various environments.