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The half-bridge device adopts Trench IGBT technology, with optional low VCE(ON) or low Eoff, suitable for high current inverter stages. MALVERN, Pennsylvania, USA, and Shanghai, China - February 29...[Details]
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As power modules are used in more and more occasions and the application occasions are complicated, the input end of the power module is often accompanied by surge impact. If the surge voltage exceed...[Details]
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Sealed maintenance-free lead-acid batteries have been widely used at home and abroad in recent years due to their advantages such as good sealing, no leakage and no pollution. However, it is difficult...[Details]
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Lithium-ion anodes using self-assembled nanocomposites can improve battery capacity. US media announced on March 16, 2010 that high-performance anode materials based on silicon-carbon nanocomposites ...[Details]
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Frequency circuit design
3.5.1 Commonly used frequency measurement methods The frequency of microwave signals is one of the main parameters that characterize the characteristics of microwave signals ...[Details]
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1 General treatment methods for electromagnetic interference
1.1 Overview
Automation systems or monitoring systems are usually subsystems in low-voltage power distribution systems. Th...[Details]
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With the development of intelligent products, smart phones and smart appliances have been widely used in most families. However, most of the human control of light is still limited to the simple us...[Details]
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As a power supply R&D engineer, you naturally often deal with various chips. Some engineers may not know much about the internals of the chip. When applying a new chip, many students directly turn to...[Details]
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1. Name: Power supply undervoltage and overvoltage alarm protector.
2. Function: When the voltage is lower than 180V or higher than 250V, it can give an audible and visual alarm. When an exter...[Details]
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The following example shows how to use a switching power supply to replace an amplifier transformer.
The toroidal transformer of a power amplifier was burned due to overheating. The nominal ...[Details]
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For the inverters commonly used by users, they mainly refer to small-power quasi-sine wave inverters. During use, the following issues should be noted. Because the inverter is an electronic product,...[Details]
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长久以来显示应用一直是led发光元件主要诉求,并不要求LED高散热性,因此LED大多直接封装于一般树脂系基板,然而2000年以后随著LED高辉度化与高效率化发展,尤其是蓝光LED元件的发光效率获得大幅改善,液晶、家电、汽车等业者也开始积极检讨LED的适用性。
The rapid popularization of digital home appliances and flat-p...[Details]
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This is an automatic temperature control speed regulator for an electric fan. It can automatically adjust the speed of the electric fan according to temperature changes. The circuit can be adjusted...[Details]
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Circuit principle: The integrated circuit charger, as shown in the figure, is a constant current charging circuit composed of a three-terminal voltage regulator (LM317). Since the potential differ...[Details]
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The 7th International Advanced Automotive Battery and Supercapacitor Symposium (AABC-07), a conference on rechargeable batteries and large-capacity capacitors for hybrid vehicles , was held in Long B...[Details]