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IntroductionIn daily work, hardware design engineers often come into contact with the indicator of leakage current, which is divided into leakage current and withstand leakage current. This article will briefly describe the differences between the two types of leakage currents in switch mode power supplies, and briefly analyze the common problems of abnormal leakage currents. At the same time, corresponding verification methods and solutions for prevention and control are provided to ensure system reliability.1.What is the difference between the withstand voltage leakage current and the leakage current (contact current) in the power supply?In layman's terms, withstand voltage leakage current refers to the leakage current flowing through the internal insulation of a product when it is not in a charged state during a high-voltage test of several thousand volts. The withstand voltage leakage current is relatively large, usually ranging from a few milliamperes to several tens of milliampe...
2024
With the rapid development of modern industry, industrial control systems play a crucial role in industrial automation. In order to ensure the stable operation of industrial control systems, industrial control power supply, as a core component, has also received much attention. Compared with ordinary power supplies, industrial control power supplies have significant differences in performance and characteristics.Industrial Control System Power SupplyFirstly, the stability of industrial control power sources far exceeds that of ordinary power sources. In industrial environments, there are a large number of factors such as electromagnetic interference and voltage fluctuations, which ordinary power sources often cannot effectively cope with. The industrial control power supply has been specially designed with stronger anti-interference ability and a wider input voltage range, which can stably output current and voltage, effectively ensuring the normal operation of the industrial control...
With the rapid development of modern medical technology, reliable power supply for medical equipment is crucial. As a specialized device, medical grade power adapters have special safety and reliability requirements to meet the usage needs of medical equipment. This article will explore the characteristics, functions, and importance of medical grade power adapters in the medical field.Medical Plug-in Power Adapter 1. Safety certification: Medical grade power adapters strictly comply with relevant safety standards in the medical industry, such as GB 9706.1, UL 60601-1, IEC 60601-1, etc., and are certified to ensure compliance with safety requirements. These safety certifications ensure that the use of power adapters in medical devices does not pose any potential risks to patients and healthcare workers. 2. Electromagnetic compatibility: There are many electronic devices in the medical environment, and electromagnetic interference is a common problem. Medical grade power adapt...
Desktop Power Adapter 1. The function of short circuit protectionDuring the use of the power supply, due to certain reasons (such as equipment failure, abnormal operation, etc.), a short circuit may occur in the circuit, that is, directly connecting two lines or components with different potentials, causing the circuit to not work properly. In severe cases, it may cause damage to the circuit and equipment, endangering personal safety. Therefore, the short circuit protection function is designed to cope with this situation. It can quickly cut off the power output in the event of a short circuit in the circuit, avoid circuit overload, and protect the circuit and equipment, ensuring the safe and stable operation of the power supply.Short circuit protection is mainly achieved by detecting the current in the circuit. When the current in the circuit exceeds the set threshold, the short-circuit protection circuit will immediately cut off the power output. Among them, current detection in th...
The Department of Energy, abbreviated as DOE, has issued DOE certification in accordance with US energy efficiency regulations, which is the source of DOE certification; CEC is the English abbreviation for the California Energy Commission in the United States. On December 30, 2005, CEC issued energy efficiency certification, also known as CEC certification, in accordance with California's electronic and electrical regulations.DOE CertificatePower adapter energy efficiency certificationCertification purposeThe main purpose of issuing DOE certification is to save energy and reduce emissions, help users save electricity, and thus reduce energy consumption demand and greenhouse effect. The latest DOE regulations require all products within the scope of DOE certification to meet the requirements; The main purpose of CEC certification is to improve the efficiency of electronic and electrical products, save energy, and reduce carbon dioxide emissions. CEC certification involves 58 categories...