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Shenzhen KINRI Energy Technology Co.,Ltd.

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· Why cannot power modules be used in parallel?

In high-power applications, a single power module often cannot meet the requirements and usually needs to be used in parallel. However, many power modules cannot be used in parallel, and improper handling can lead to the failure of the entire system. Below is an analysis of why power modules cannot be used in parallel.The above figure shows the internal equivalent and output load characteristic curve of the power module: VO=f (IO), R is the output impedance of the module (including wire resistance and contact resistance, etc.), and when unloaded, the module output voltage is the maximum value VO (max). When the load current changes △ IO, the change in load voltage is △ VO, △ VO=R * △ IO, and R * △ IO also represents the load adjustment rate of the module. The relationship between load voltage VO and load current IO can be expressed as: VO=VO (max) - R * IOInternal equivalent diagram of power module and load characteristics of power module: VO=f (IO)As shown in the above figure: When t...
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04-15
2024
· Advantages and precautions of gluing power modules

The advantages of gluing the power moduleBare board gluing can prevent moisture, corrosive chemicals, and gas erosion in the air (especially sulfur can corrode copper in devices and PCB circuits), and prevent mechanical impact, vibration, support, and buffering of precision or fragile components, such as ferrite used in transformer cores. Simultaneously supporting PCB pins and reducing most of the stress, so that the connection strength between pins and circuit boards does not solely rely on solder joints.Gluing uses highly insulating media to replace the air around the PCB, avoiding arc discharge caused by overvoltage stress in the power supply, especially in high-altitude areas. At the same time, it also avoids pollutants such as moisture, dust, and dirt that reduce the insulation between input and output or create electric marks on the surface. Thermal conductive sealing materials can transfer heat to the casing and evenly distribute the heat gradient to reduce hotspots within the...
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04-15
2024
· Introduction to the design process of isolation switching power supply module

Switching power supplies come in various types of circuits and can be designed to meet different application scenarios based on their unique strengths. Below is a brief explanation of the process of designing an isolation switching power supply module.First, determine the power:Choose the corresponding topology structure according to specific requirements, such as selecting a flyback type for isolation switch power supply modules, which can basically meet the requirements.Select the corresponding PWMIC and MOS for preliminary circuit schematic design:After we determine to use a flyback topology for design, we need to select the corresponding PWMIC and MOS for preliminary circuit schematic design, which can be split or integrated design. Split type PWMIC and MOS are separate, which has the advantage of freely matching power, but the disadvantage is that the design and debugging cycle will be longer. Integrated PWMIC and MOS are integrated in one package, saving designers a lot of compu...
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04-15
2024
· Which is more popular, half bridge switching power supply or full bridge switching power supply?

In modern electronic devices, switch mode power supplies play a crucial role. Half bridge switching power supplies and full bridge switching power supplies, as two common types, have always been of great concern. So, which one is more popular?1. Characteristics of Half Bridge Switching Power SupplyMinimalist structure: The design is relatively simple, easy to manufacture and maintain.Cost advantage: The lower cost makes it attractive in price sensitive areas.Applicable scenarios: Widely used in small and medium-sized power electronic devices, such as household appliances.2. Advantages of Full Bridge Switching Power SupplyPowerful power output: able to provide higher power to meet the needs of large equipment.High stability: able to maintain stable operation even under complex working conditions.Widely applicable: suitable for industrial equipment, medical devices and other fields with high power requirementsWhen facing these considerations, the choice of switch mode power supply depen...
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04-13
2024
· An article will help you understand the difference between switching power supply and regular power supply

What is a switching power supply?With the development and innovation of power electronics technology, switching power supply technology is also constantly innovating. At present, switching power supplies are widely used in almost all electronic devices due to their small size, light weight, and high efficiency, and are an indispensable power supply method for the rapid development of the electronic information industry today.A switching power supply is a type of power supply that utilizes modern power electronics technology to control the time ratio of switching on and off, and maintain a stable output voltage. Switching power supplies are generally composed of pulse width modulation (PWM) control ICs and MOSFETs.Switching power supplies are relatively linear power supplies, in which the input directly rectifies AC power into DC power, and under the action of high-frequency oscillation circuits, switches are used to control the on/off of current, forming high-frequency pulse currents....
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04-13
2024

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