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series connection Resistance, also known as series connection Resistance network means that two or more resistors in a circuit are arranged end to end, and the current must pass through each resistor in turn. In electronics and circuit design, series connection Resistors are a basic building block that can be used to achieve a variety of functions. Now we will discuss in detail why we add series connection Resistance and its main function: 1. Voltage division function: when multiple resistors series connection The voltage will be distributed to each resistance, and its distribution proportion is equal to the proportion of each resistance value. This feature makes series connection Resistance can be used as a voltage divider in circuits requiring different voltage levels. 2. Current control: series connection Resistance can
Date: May 10th, 2024 Reading: 714
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LC series connection Resonance, also called inductance capacitance series connection Resonance, a basic concept in circuit theory, occurs when an inductor (L) and a capacitor (C) series connection Resonance phenomenon at a specific frequency during mode connection. In the resonance state, the impedance of the whole circuit is resistive, and the impedance value reaches the minimum, making the current reach the maximum. At the same time, the voltage at both ends of the inductance and capacitor reaches the maximum. LC series connection Resonance is widely used in radio equipment, such as tuner, FM3116-GTR filter, mixer and oscillator. However, LC series connection Resonance is not always beneficial. In some cases, such as LC filter, noise amplification may occur
Date: April 30, 2024 Reading: 706
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When it comes to the series connection When and are connected in parallel, the calculation method of their total inductance (total inductance) is similar to that of resistors, but attention should be paid to possible mutual induction (coupling) between inductors. Here, we first assume that there is no mutual induction between BUK7275-100A inductors. They are ideal inductors. inductance series connection When two or more inductors series connection The current on each inductor is the same, and the voltage is distributed proportionally. series connection The total inductance of inductor L_total is the simple arithmetic sum of the inductance values L1, L2,..., Ln of each inductor: L_total=L1+L
Date: April 24, 2024 Reading: 697
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The resistor OPA2171AIDR is a basic element in the circuit, which is used to limit the flow of current. The function of resistance is to consume electric energy by blocking the flow of current and convert electric energy into heat energy. In the circuit, the main functions of resistance are as follows: 1. Current limiting: resistance can limit the current in the circuit by blocking the flow of current. According to Ohm's law, there is a linear relationship between resistance and current. The greater the resistance, the smaller the current. 2. Voltage regulation: the resistance can reduce the voltage by consuming electric energy. When resistance and power supply series connection The resistance will consume a part of the voltage, making other components in the circuit obtain a lower voltage. The function of this regulated voltage
Date: August 15, 2023 Reading: 249
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series connection The discharge resistance of low-voltage capacitor bank is to prevent the capacitor bank from discharging too fast, causing excessive current impact and damage to capacitors and circuit equipment. The following is a common method for series connection Discharge resistance design of low-voltage capacitor bank. 1. Determine the rated voltage and capacity of the capacitor bank: determine the rated voltage and capacity of the capacitor bank according to the actual needs. In general, the rated voltage of ISO124U capacitor bank shall be equal to the highest working voltage of the circuit, and the capacity shall be selected as required. 2. Calculate the discharge time constant of the capacitor bank: the discharge time constant is an index to measure the discharge speed of the capacitor bank. By calculating the discharge time constant of the capacitor bank, we can determine
Date: July 17, 2023 Reading: 1229
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series connection Type PI regulator and parallel type PI regulator are two forms of PID controller commonly used in control systems. They have some differences in structure and performance. The two regulators will be compared below. 1. Structure series connection The structure of PI regulator (also known as cascade PI regulator) is to integrate a PI controller series connection To the output of another PI controller. That is, the output of the first PI controller is used as the input of the second PI controller. The parallel PI regulator (also called parallel structure) is designed to parallelize the output of one PI controller with the output of another PI controller. That is, the outputs of the two PI controllers are simultaneously used as the control system
Date: July 17, 2023 Reading: 1109
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The step-down switching regulator is a commonly used power regulator, which can convert high voltage into stable low voltage output. Common buck switching regulator circuits include series connection Transistor and power MOSFET. 1、 series connection Transistor step-down switching regulator: series connection Transistor (also called diode) is a simple and common voltage regulator. stay series connection In a transistor step-down switching regulator circuit, one transistor is used as a current control element, and the other transistor is used as a voltage reference element. Basic series connection The circuit of transistor step-down switching regulator includes input power supply, current limiting resistor, FDS9926A regulator diode and output load. The current limiting resistor is used to limit
Date: July 12, 2023 Reading: 915
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With the popularization of modern electronic equipment, RTC (Real time clock) batteries are used more and more widely. RTC battery is a small battery used to provide power to the real-time clock in the computer system to maintain time, date and other time related information. However, in practice, due to series connection Improper resistance will affect the life of RTC battery. This article will introduce series connection The role of resistance, common problems and solutions to help readers better use RTC batteries. 1、 series connection Role of resistance series connection The resistance LF353DR refers to connecting multiple resistors together so that the current flows through each resistor in turn. In R
Date: May 29, 2023 Reading: 685
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Product details: LM3421 and LM3423 series devices are multi-functional high-voltage N-channel MOSFET controllers for LED drivers. They can be easily configured as buck, boost, buck boost, and SEPIC topologies. This flexibility and the 75 V rated input voltage make these controllers ideal for illuminating LEDs in large application families. The adjustable high side current detection voltage allows the LED current to be strictly regulated with the highest efficiency possible. LM3421 and LM3423 devices use predictive off time (PRO) control, which is peak current mode control
Date: March 4, 2022 Reading: 754
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series connection Resonance has a condition called series connection Ferromagnetic resonance. Technicians familiar with the power system know that when single-phase grounding or circuit breaker operation occurs in the line, the voltage of the voltage sensor rises, and the three-phase iron core is subject to different excitation, showing varying degrees of saturation. The induction changes of the voltage sensor, and the induction values are different, and the neutral point displacement produces zero sequence voltage. series connection Resonance has a condition called series connection Ferromagnetic resonance. Technicians familiar with the power system know that when single-phase grounding or circuit breaker operation occurs in the line, the voltage of the voltage inductor rises, the three-phase iron core is stimulated differently, showing different degrees of saturation, and the induction changes of the voltage inductor, and the induction values are different
Date: November 19, 2020 Reading: 7243
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On the 5th, Liandian announced that it will establish a cooperative relationship with professional wafer foundry (MEMS) Asia Pacific Advanced Micro System (APM) to provide better MEMS production services for both customers. LinkedIn will use its own production capacity of 8 inch and 12 inch wafer factories, combined with APM's 6 inch wafer factory and its rich MEMS expertise and prototype development experience, to provide chip designers with end-to-end MEMS production solutions with high flexibility and scalability. Shan Jie, senior vice president of the marketing office of Liandian Corporation, said that the MEMS products produced by Liandian Corporation are widely used in microphones, accelerometers and the environment
Date: September 6, 2016 Reading: 1389
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Skyworks SolutiONS, Inc. grandly launched the high-power series connection PIN diode. This high heat dissipation diode has extremely low insertion loss, ultra-high isolation, fast switching speed, excellent power capacity and low distortion characteristics while maintaining a small surface mount volume. It is an ideal choice for the infrastructure, national defense, emergency and military markets. The detailed data sheet can be found at the following website: SMP1345-087LF: http://www.Skyworksinc.com/uploads/document...
Date: September 20, 2011 Reading: 774
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unit series connection The multiple voltage source high-voltage inverter is a low-voltage single-phase inverter series connection To make up for the shortage of the withstand voltage capability of the power device IGBT. Multiplication means that each phase consists of several low-voltage power units series connection Each power unit is powered by a multi winding phase-shifting isolation transformer. Figure 1 shows the main circuit topology of 6kV frequency converter. Figure 2 Unit 5 series connection Electrical block diagram of high-voltage inverter. Each power unit in Figure 2 is a low-voltage PWM voltage source inverter with three-phase input and single-phase output, which is composed of low-voltage insulated gate bipolar transistor (IGBT). Its disadvantages are: 1. Because there are transformers in the system, many cables are needed, and the system efficiency is high
Date: September 8, 2006 Reading: 1033
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AnalogicTech introduced a high frequency, high efficiency, constant current boost converter AAT1239-1, which can drive up to 10 series connection White light emitting diode (WLED). This new driver chip is specially designed for the backlight application of personal navigation devices (PNDs), electronic dictionaries, electronic photo frames and cellular phones. It uses the simplified serial control S2C single line interface proprietary by Yannuo, effectively reducing the screen flash generated in the commonly used low-frequency pulse width modulation (PWM) control design. "As portable system designers continue to expand their capabilities in their products, they need to use increasingly advanced
Date: February 18, 2008 Reading: 1335
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FOSVOS launched by Fuyue Electronics series connection The special integrated circuit GM6802 for quick charger of nickel hydrogen battery can control the external constant current charging circuit series connection The battery is charged quickly. GM6802 is particularly suitable for portable products powered by rechargeable nickel metal hydride batteries. It has all the functions required for charging nickel metal hydride batteries. It does not need external controller and firmware support. It is implemented in pure hardware, and can fully automate the charging process. The charging time is short, the charging efficiency is high, safe and reliable, and the application design is simple. GM6802 has a voltage detection module inside, which detects the current voltage of the battery through the external resistance network, and stores the detected voltage
Date: January 5, 2009 Reading: 848
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1. Introduction Guangdong Shaoguan Iron and Steel Group Co., Ltd. (hereinafter referred to as Shaoguan Iron and Steel) is located in the southern suburbs of Shaoguan City, covering an area of 8320m2. Shaoguan Iron and Steel is one of the 500 largest industrial enterprises in China and one of the 512 key enterprises in the country, ranking 95th among the 100 large iron and steel enterprises in the world, with an annual steel production capacity of more than 1.6 million tons. The ironmaking plant is a main production plant of Shaoguan Iron and Steel Co., Ltd., which is responsible for smelting molten iron and iron blocks required by the company. The ironmaking plant has 6 blast furnaces with a total capacity of 2405m3 and an annual output of 2.3 million tons of iron. A large amount of slag is produced in the process of smelting molten iron in the blast furnace. Usually, it is cooled and dispersed with large flow of medium pressure water, and transported to the slag pool for recycling as smelting
Date: April 28, 2008 Reading: 511
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Nippon Nippon Industries announced that they have developed a bidirectional thyristor "K1VZL09/K1VZL20" that can prevent all lighting from going out in case of an open circuit fault of LED, and will start mass production in April 2010. It is mainly used for street lights, projectors, emergency indicators and signal lights that cannot be completely extinguished. Its product name is "SAIDAC" As we all know, multiple LEDs series connection When one LED has an open circuit fault, all LEDs connected to it will go out. Moreover, due to the influence of the faulty LED, the voltage may rise and destroy other LEDs. Therefore, it was always used with LE
Date: June 29, 2010 Reading: 1469
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AnalogicTech in the United States has launched a market that can drive 8 parallel white LED groups at the same time series connection IC "AAT1409" of 11 white LEDs. The maximum supply current of each group is 45mA, and the total maximum supply current of eight groups is 360mA. Up to 92% conversion efficiency can be obtained. It is mainly used for backlight of LCD, laptop, portable DVD player, etc. The LED driver IC uses a boost DC-DC converter. Integrated switch elements. Switching frequency can be selected from 675kHz or 1.3MHz. It can also be driven synchronously with the external clock source. To prevent light loads
Date: August 24, 2010 Reading: 1275
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Linear Technology Corporation launched SOT23 packaged series connection Voltage reference LT6654, which is specially designed for accurate operation in the temperature range of - 40 ° C to 125 ° C. This voltage reference has 0.05% initial accuracy, 10 ppm temperature drift and low frequency noise of only 1.6 ppm. The LT6654 can operate on a power supply that is only 100mV higher than the output, and maintains a voltage adjustment error of only 5ppm/V when the power supply voltage is up to 36V. Buffered Output Implementation
Date: August 16, 2010 Reading: 1185
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It is reported that Mauda Electronics has launched LED driver, APW7207, with built-in N-channel switch, which can drive 6 series connection White LED. It is understood that the fixed 1MHz switching frequency of APW7207 can effectively reduce the volume of external inductance and capacitance. The built-in 28V over-voltage protection function can avoid unexpected high voltage caused by empty load connection. The maximum efficiency can reach 88%. The internal reference voltage of 0.25V can be used as LED current limiting to obtain the maximum efficiency and extend the service life of the battery. In addition, the APW7207 uses TSOT-23-6A packaging, which is very helpful for saving the space of the circuit board. APW7207 can be operated in
Date: January 9, 2010 Reading: 1259
