With the implementation of national compulsory certification, electromagnetic interference and electromagnetic anti-interference technology gradually put on the agenda, the design of the new power supply should pass the electromagnetic compatibility test, in order to ensure the circulation of products in the market.
Switching power supply is widely used by electronic enterprises due to its high efficiency and small size. The following are the test methods and test items summarized in my work. If these aspects can be fully considered in the design of power supply, its products will be used by more and more customers.
Electronic products now have higher requirements on power supply, most of which are concerned about its stability, the range of input voltage, output stability and output harmonic. In the work, it is found that some power supplies have larger ripple waves, which leads to the equipment not working. Therefore, this is also an aspect that affects the development of power supply.
In the practical work of power supply circuit, the most concerned about (a) voltage regulation rate or source effect, because the circuit is determined, the load have been determined, the influence of load is lower than the input voltage of power supply, in addition to pay attention to the electromagnetic interference, in the electronic environment, the electromagnetic interference of power supply can affect the work, the effect of the source and load effect of small power supply its stability is better, the power supply should be considered in the design of these aspects.