About DTC ELECTRONICS SHENZHEN DTC ELECTRONICS CO LTD is a professional electronic components supplier with more than 10 years, is one of the largest electronic components suppliers in the domestic market. The company takes "reputation first, reasonable price, honest management" as its purpose, and has established a good reputation in the same industry, received the praise and trust of many customers. With the support of our customers, in the fierce market competition, the company continues to innovate and develop gradually, has made great progress in the emerging field of e-commerce, and has formed a set of management and operation system with its own characteristics. SHENZHEN DTC ELECTRONICS CO LTD adheres to the talent concept of "people-oriented", and vigorously absorbs professional talents to enrich the technical, management and marketing team. Constantly improve our own management, provide quality services, create excellent brands, pursue excellence goals. We have professional sales staff and excellent engineering technologist, has always been to quickly respond to customer consultation and provide quality delivery service as the basis, to provide customers with the most closely integrated with the application needs of the solution, so as to reduce the development and application costs of customers, make DTC ELECTRONICS TECHNOLOGY and customers grow together through mutual benefit. The company mainly distributes various manufacturers of integrated circuits, Epson crystal, modules, and so on. The main brands are: EPSON, TXC, KDS, ADI, TI, MAXIM, XINLINX, DALLAS, VISHAY, FREECALE, ATMEL, FSC, ON, LATTICE, INTERSSIL, etc.
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What is the low ESR and high ripple current for solid state capacitors
Capacitors are energy storage elements used in circuits for tuning, filtering, coupling, bypass, energy conversion, and delay. Capacitors are often called capacitors. According to its structure, it can be divided into three types: fixed capacitor, semi-variable capacitor and variable capacitor. Solid aluminium electrolytic capacitor is short for conductive polymer solid aluminium electrolytic capacitor, and is one of the highest-grade products in capacitor products. ESR (Equivalent Series Resistance) refers to the series equivalent resistance, which is an important indicator of capacitance. The lower the ESR, the faster the charge and discharge of capacitance. This performance directly affects the decoupling performance of power supply circuit of microprocessor. The advantage of low ESR of solid-state electrolytic capacitance in high frequency circuit is more obvious. It can be said that the low ESR characteristics at high frequencies are the watershed between the performance differences of solid electrolytic capacitance and liquid capacitance. The ESR of solid-state aluminium electrolytic capacitance is very low, with very small energy dissipation. The very low ESR characteristic of the solid state capacitor under high temperature, high frequency and high power conditions can fully absorb the high amplitude voltage generated between the power cords in the circuit and prevent its interference to the system. Currently, the power consumption of the CPU is very large, the main frequency is far beyond 1GHz, the peak current of the CPU reaches 80A or more, and the output filter capacitance is close to the critical point of operation. On the other hand, CPUs work in a variety of modes, most of the time in the process of working mode conversion. When the CPU changes from a low power state to a full load state, the large amount of energy required for instantaneous (generally less than 5ms) switching of this CPU comes from the capacitance in the CPU power supply circuit. At this time, the high-speed charging and discharging characteristics of the solid state capacitor can output the high peak current instantaneously, ensuring adequate power supply and ensuring the stable operation of the CPU. 
2024-04-28 1
What is the status of the film capacitor industry chain?
China is the largest producer of thin film capacitors, accounting for more than 60% of the global total output value. In 2020, the market size of China's film capacitance industry was 10.2 billion yuan. With the application growth of thin film capacitors in new energy automobiles and photovoltaic fields, it is expected to produce more than 20 billion yuan incremental market scale in the next three years, and China's thin film capacitor market is expected to enter a high-speed growth period. Thin film capacitor is a capacitor which takes electrical grade electronic thin film as dielectric and metal foil as electrodes and coils the electrodes with plastic thin film. According to the current type, it can be divided into two types: DC film capacitance and AC film capacitance. DC film capacitor is characterized by large capacity, low voltage resistance, polarity, self-healing characteristics, high reliability, good temperature stability and long service life. Typical applications include drivers, UPS, solar inverters, electronic ballasts, small motors for automobiles, household appliances, and various power sources. AC film capacitor has the characteristics of small capacitance and high voltage resistance. It is an indispensable component in the application of conventional industrial AC power supply and the start and operation of asynchronous motor. AC capacitors are widely used in AC output filters, especially output filters such as uninterruptible power supply (UPS) and photovoltaic inverters. The function of thin film capacitor in photovoltaic inverters is mainly to absorb high pulse current at DC-Link end, make the voltage fluctuation at the inverter end stable and controllable, and play an important role in the stability and performance of photovoltaic devices.
2024-04-28 1
What method can be used to measure the output ripple and switch transient of the voltage regulator?
Voltage regulator (AVR) is specially designed for AC brushless generator with matching base wave, harmonic compound excitation or permanent magnet generator excitation (PGM system). The voltage regulator realizes the automatic adjustment of the output voltage of the generator by controlling the excitation current of the alternating current exciter of the generator. Generator voltage regulator can be used for normal 60/50Hz and mid-frequency 400Hz single-machine or parallel-running generators. It is important to minimize the output ripple and transient of the switch regulator, especially when supplying power to noise-sensitive devices such as high-resolution ADC, the output ripple will appear distinctly spurious in the ADC output spectrum. To avoid reducing signal-to-noise ratio (SNR) and stray-free dynamic range (SFDR) performance, switch regulators are usually replaced by low-pressure differential regulators (LDOs), sacrificing the high efficiency of switch regulators in exchange for cleaner LDO output. Understanding these artifacts will enable designers to successfully integrate switch regulators into more high-performance, noise-sensitive applications. Output ripple and switch transient depend on the regulator topology and the value and characteristics of external components. Output ripple is the residual AC output voltage, which is closely related to the switch operation of the regulator. Its base frequency is the same as the switch frequency of the regulator. Switch transient is a high frequency oscillation that occurs during switch switching. Their magnitude is expressed in terms of the maximum peak voltage, which is difficult to measure precisely because it is highly correlated with the test settings. The inductance and output capacitance of the regulator are the main components that affect the output ripple. Smaller inductance produces faster transient response at the expense of larger current ripple; A larger inductance makes the current ripple smaller at the expense of a slower transient response. The output ripple can be minimized by using a low effective series resistance (ESR) capacitor. 
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