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In order to accelerate the development of new products, reduce development costs, and improve product competitiveness, domestic automobile companies have begun to use benchmarking technology as the...[Details]
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All adopt 48V power supply system to reduce power loss and weight in vehicle cable harnesses. However, 48V power supply design is facing challenges in meeting EMC specifications. Only careful compo...[Details]
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The Mid-Autumn Festival has passed, which means September has also entered the middle of the month, and there is only the last quarter left in 2019. I am always used to summarizing when a task is com...[Details]
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iFixit recently disassembled the Samsung Galaxy S21 phone and rated its repairability at 4 out of 10. Although the S20 has never received an official rating from iFixit, foreign media gsmarena believ...[Details]
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In the previous courses, we have learned a lot about the concept of clock, such as the main clock of the microcontroller we use is 11.0592M, the I2C bus has a clock signal line SCL, etc. These c...[Details]
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Stepper motors are widely used. For example, printers, disk drives, toys, car wipers, mobile phone vibration, mechanical fixtures, burners and other mechanical control occasions Some concepts: Number...[Details]
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PFC main circuit schematic diagram
Figure PFC main circuit schematic
The schematic diagram of the lossless absorption PFC main circuit is shown in the figure. In the figure, B1 is a rectifi...[Details]
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1. AC LED is not a fundamental change in the device.
In other words, there actually does not exist an LED chip that works with an alternating electric field mechanism. The AC LED that is now a...[Details]
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This afternoon, the fourth session of the 13th National People's Congress officially closed in Beijing. Over the years, the contents of the two sessions have always been the focus of attention from...[Details]
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As the functionality of cell phones and other portable handheld devices continues to increase, the design trade-offs are becoming more delicate. Popular functions such as text messaging and web bro...[Details]
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About two years ago, the implementation of high-end intelligent assisted driving was still in a period of obvious chaos. At that time, the most discussed topic in the entire industry was whether to f...[Details]
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1 Introduction
As the demand for high power factor converters continues to grow, power supplies with a unity power factor are becoming more and more popular. In computers or other devices, the...[Details]
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Not long ago, two primary school students in Wenzhou, Zhejiang Province, became popular online because of a video that could be called a "textbook elevator self-rescue". In the video, the two childre...[Details]
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I am going to test and demonstrate the factored power operation of the PRM and VTM combination. I will use these evaluation boards to test.
These two boards can be joined together to form a complet...[Details]
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EMI in Power Supplies
High-frequency switching pulse-width modulation (PWM) AC/DC and DC/DC power converters are now the power source of choice for most systems because of their high effic...[Details]
Analogue and Mixed Signal
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