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Electromagnetic Compatibility (EMC) design: Key component selection and application guide

In the context of a complex electromagnetic environment, each electronic and electrical equipment must not only be able to resist a certain amount of external electromagnetic interference to maintain normal operation, but also must ensure that it does not emit electromagnetic interference beyond the ability of other electronic and electrical equipment in the environment. This means that the equipment must meet the requirements of the established standard on the maximum tolerance value of electromagnetic sen....
2024-05-27 11:54:48 404 : #EMC
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Hardware engineers must read: a detailed introduction of 7 mainstream single-chip computers

Embedded concept First of all, "embedded" is a concept, there is no exact definition, each book has its own definition. But the main idea is the same, that is, compared with the general system of the PC, the embedded system is a special system, the structure is simple, in both hardware and software, only the required part is retained, and the unnecessary part is cut out. Therefore, embedded systems generally have the characteristics of portability, low power consumption, single performance and so on. Then....
2024-05-24 16:02:43 524 : #Embedded system#MCU
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How to solve the ripple and noise problems caused by improper inductor selection in SMPS?

1. What is Switching mode power supply SMPS is an efficient regulator that reduces the input voltage (buck converter), increases the input voltage (boost converter), or does both (buck - boost converter). Figure 1 shows the basic switching converter topology. Figure 1. Common SMPS topologies and their output formulas Each SMPS works the same way: storing energy in an inductor and utilizing pulse width modulation (PWM) technology to get the desired output. These converters should follow the law of....
2024-05-23 15:05:37 73 : #Switching Mode Power Supply (SMPS)#inductor#EMI
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PCB design points: size, layout and heat dissipation optimization scheme

At present, the printed circuit board is still the main assembly method for all kinds of electronic equipment and systems. Practice has proved that even if the circuit schematic design is correct and the printed circuit board is improperly designed, the reliability of electronic equipment will be adversely affected. For example, if the two thin parallel lines of the printed board are close together, a delay in the signal waveform will be formed, forming reflected noise at the end of the transmission line. T....
2024-05-23 14:18:24 38 : #EMC#PCB
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Effective Buck Converter EMI Suppression: Case Studies and Practical Tips

Continue with the article "EMC rectification Problem: EMI Source Analysis and Buck circuit Optimization Strategy (Part 1)". 5. Case Study This chapter will demonstrate the effects of different approaches in the EMI design of Buck converters. The IC used in the demonstration is the RT7297CHZSP, a current mode Buck converter with 800kHz operating frequency and 3A output capability, in the SOP-8 package. The circuit in the test works with 12V input and 3.3V/3A output. The circuit used in the test is shown ....
2024-05-22 17:16:17 32 : #EMI#Buck circuit optimization
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EMC rectification Problem: EMI source Analysis and Buck circuit Optimization Strategy (Part 1)

introduction Radiation this thing, can not be seen and touched, rectification is also calculated by the hour, and if you are not careful, tens of thousands of dollars will be gone. I have to say, EMC rectification is tough. This article mainly shares theory + practical cases, divided into upper and lower articles, the overall length of the article is longer, it is recommended to collect and read. 1. What is the source of EMI? There are two types of radiation sources that cause EMI problems: alternating....
2024-05-22 14:42:57 30 : #EMI#Buck circuit optimization
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PTC resettable Fuses: FAQ collection

PTC resettable fuse, also known as self-restoring fuse, self-restoring fuse or PPTC fuse, is an electronic protection device. It uses the positive temperature coefficient effect of the material, that is, the property that the resistance value increases significantly with the increase of temperature, to achieve circuit protection. When the circuit is working normally, the PTC fuse presents a low resistance state, allowing the current to pass through smoothly. If there is an overcurrent situation in the circ....
2024-05-20 14:20:04 61 : #PTC resets the fuse
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Optimizing ESD protection: a comparative analysis of device-level and system-level protection

Today, mobile electronic devices have become an important part of our lives and culture. The adoption of touch technology on tablets and smartphones allows us to interact more with these devices. It constitutes a complete electrostatic discharge (ESD) hazardous environment, that is, the electrostatic discharge generated by the human skin on the equipment. For example, when using consumer electronic devices, ESD can occur between the user's finger and the tablet USB or HDMI port, which can cause irreversibl....
2024-05-17 15:14:49 22 : #Electrostatic Discharge (ESD)
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Key guide: Surge suppression IC FAQs

A surge suppression IC, also known as a transient voltage suppression IC or an overvoltage protection IC, is an integrated circuit component designed to protect electronic circuits from damage caused by transient voltage surges (such as lightning strikes, electrostatic discharge ESD, switching transients, etc.). These devices protect sensitive electronic components at the back end from damage by responding quickly and switching on or clamping excessive voltages. Surge suppression ics include but are not lim....
2024-05-16 16:39:57 28 : #Surge suppression ic
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One article to understand the film capacitor common problems

A film capacitor, also known as a metallized film capacitor, is a capacitor that uses a polymer film as a dielectric. The core feature of this type of capacitor is that its internal electrode is composed of an extremely thin metal layer, which is usually deposited directly on the surface of the film through vacuum evaporation technology to form a metallized layer. This design greatly reduces the thickness of the electrode, so that the film capacitor can achieve a high capacitance in a small volume, which is....
2024-05-15 16:30:31 33 : #Film capacitor
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