How to solve common quality problems with power adapters

Hidden safety performance of the product under short circuit and overload

Under the fault conditions of output short circuit, short circuit of components such as capacitors or diodes, the internal loss of the power adapter sharply increases, causing the temperature rise of various parts to rise. The design and application of electronic circuits should ensure that under abnormal working and fault conditions, the temperature rise of various parts of the product cannot exceed the specified requirements, let alone the surrounding items have a fire hazard. Under fault conditions, the power adapter can be damaged, but not Reduce the safety performance of the equipment.

Product failure to meet requirements under abnormal working and fault conditions is a common problem in spot checks. Some product shell temperatures exceed 150 ° C under fault conditions, and the shell softens, which seriously reduces product safety performance.

Product marking is incomplete or irregular

Marking should contain important information to guide users to install and use correctly. Marking the product correctly is one of the basic measures to ensure the safety of the user’s personal property. The marking requires that the content should be clean and legible. At a minimum, the following information should be included: the name, trademark, or identification mark of the power adapter distributor or manufacturer; the model code or model specifications; the nature of the power supply; the rated power supply voltage range. If the information is incomplete and cannot be used to properly guide consumers, some may even misuse and damage the electronic equipment equipped with it.

The power plug is not standardized

The power plug has two types of non-grounding and two-pole with grounding. The power plug should prevent unipolar insertion in use, that is, when any plug of the plug is mated with the live plug of the socket, the other pins cannot be easily accessible . In the spot check, it was found that the plug was too long, and the length of the plug increased the risk of electric shock during the plugging process. In addition, the shape of the power plug does not meet the requirements is more common. Because these plugs are not compatible with the sockets, it is also very easy to cause electric shock to users.