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Shenzhen KINRI Energy Technology Co.,Ltd.

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· How to determine whether a switching power supply is qualified?

In the era of rapid development of modern technology, switching power supplies are ubiquitous and serve as the "heart" of numerous electronic devices. So, how do we determine whether a switching power supply is qualified? This is a very crucial issue. Follow me, decrypt new knowledge today!500W Single Output Switching Power Supply1. Appearance inspectionFirstly, we need to conduct a visual inspection. A qualified switching power supply should have an intact appearance without any damage or deformation. At the same time, each interface should also be firm and reliable, with no signs of looseness.2. Performance testingSecondly, electrical performance testing is an essential step. We need to measure the accuracy and stability of the output voltage to ensure that it fluctuates within the specified range, and the ripple size should be controlled within a reasonable range. This is like the pulse of a power source, it must be stable and powerful.3. Load testingFurthermore, load capacity test...
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05-07
2024
· Effective methods to reduce the no-load power consumption of switching power supplies

In modern electronic devices, the no-load power consumption of switching power supplies has always been a concern. It has sparked public discussion, so how to effectively reduce the no-load power consumption of switching power supplies? Here are some expert suggestions collected by the editor. There are a total of eight points, let's take a look together!switching power supply1. Optimize circuit designChoosing an efficient topology structure, such as LLC resonant converter, can reduce losses in the circuit.Reasonably layout and wiring, reduce line impedance, and reduce energy loss.2. Improve the quality of electronic componentsChoosing high-quality power devices, such as MOSFETs, has lower conduction resistance and lower losses.Using high-quality capacitors and inductors to improve its performance and stability, and reduce its own losses.3. Adopting synchronous rectification technologySynchronous rectification technology can replace traditional diode rectification, greatly reducing lo...
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05-07
2024
· The reasons and application scenarios of no-load power consumption generated by switching power supplies

In modern electronic devices, switching power supplies are widely used. However, even without load connection, switching power supplies still have no-load power consumption. So, how is this no-load power consumption generated?Firstly, internal circuit losses are one of the main reasons for no-load power consumption. The transistors, capacitors, inductors and other components inside the switching power supply, even when there is no current passing through, still have a certain amount of leakage current and equivalent resistance, which can lead to energy loss. For example, during the high-frequency switching process, the conduction and cutoff of the transistor will generate a certain amount of energy loss.Secondly, the consumption of control circuits is also a factor that cannot be ignored. The control circuit of the switching power supply needs to work continuously to monitor and adjust the output status of the power supply, even when it is unloaded. Although the electricity consumptio...
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05-07
2024
· Common problems with power supply applications: abnormal output

Abstract: This article briefly describes the common problems of output abnormalities in the application of switch mode power supplies, and analyzes the causes of the problems. At the same time, corresponding verification methods and solutions and preventive measures are provided to reduce the possibility of output abnormalities in different applications of power supplies and improve system reliability.Introduction:In daily work, engineers often encounter the following problems with abnormal power output:(1) Why is the nominal 24V power supply not 24V during testing?(2) Why does the measured ripple noise and other parameters of the power supply exceed the nominal values in the manual?(3) The input voltage is normal, but after working for a while, why is the output gone?......This article will sort out common output anomalies, analyze their causes, and provide corresponding solutions.Common abnormal output phenomena of power supplyAs an essential core component of electrical equipment,...
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05-07
2024
· How to understand the leakage current indicator in the power supply?

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...
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05-07
2024

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