Q:Power amplifier with a good power or good switching power supply?

Generally believed that the best R-type transformer, ring type, switching power supply transient response is not enough, open-loop can be used, but the effect is poor. Now there are dedicated power amplifier switching power supply, the main features are: resonant switch circuit; (and the same effect as the transformer sine wave effect, very little interference, the car amplifier has been using resonant circuit). Open-loop output, not regulated output, no response time. Heavy weight, high efficiency and so behind are nonsense

Q:Can notebooks have an external switching power supply?

Yes, you need to have a certain maintenance experience of the maintenance staff to get, the following details of the production process First note that the notebook hardware at the hard disk, memory, cpu, the other specifications are different. Therefore, the notebook key to open several, contact type, cable type, there are fixed, and so on it, a variety of. In the case of contact, for example, other basic ideas are the same. The first step, open the computer after the shell, remove the motherboard. The second step, find the laptop key position (on the motherboard position), usually in the computer's switch key (start the computer button) near the location.

Q:What is the working principle of the power switch?

But we also note that 300V DC power added to the standby power switch and standby power switch transformer, the standby power switch is designed to self-excited oscillation mode, standby power switch immediately start working in the standby power switch transformer times Level output two sets of AC voltage, the rectifier filter, the output + 5VSB and +22 V voltage, +22 V voltage is designed for power supply internal control IC power supply. + 5VSB voltage for the standby voltage, the output to the motherboard. When the user presses the power button of the chassis, the motherboard sends a power-on signal to the power supply. At this time, the (green) color line is low, the IC's internal oscillation circuit starts immediately, generates the pulse signal, The signal is applied to the base of the main switch tube by pushing the transformer so that the main switch is operated in the high frequency switching state. The main switch transformer output voltage of each group, after rectification, filtering and regulation, get each group of DC voltage, the output to the computer host. But the CPU on the motherboard at this time has not yet started, must wait + 5V voltage from zero to 95%, IC detection +5 V rose to 4.75V, IC issued P.G signal, the CPU starts, the computer work properly. When the user shuts down, the green line is at a high level, the IC immediately stops oscillating, the main switch tube because there is no pulse signal and stop working. -12 to +3.3 of the voltage drop to zero. The power supply is in standby mode. Protection circuit principle brief: In the normal use of the process, when the IC detects the load is in: short circuit, overcurrent, overvoltage, undervoltage, overload and other state, IC internal signal, so that the internal oscillation stopped, the main switch tube because there is no pulse and stop working The So as to achieve the purpose of protecting the power supply.

Q:Yesterday when the transformer to find a problem, a boost inductance, my air gap plus the greater the inductance of the smaller, but a counterattack transformer my air gap plus the more inductance but the greater, now a bit can not figure out.

You are not a flyback transformer only done once the air gap concluded that there may be two of your core wrapped around the loose is not the same, anyway, it is impossible under the same conditions, the air gap to increase the amount of inductance but large.

Q:12V10A switching power supply in the layout of the line when the longest cloth?

Power power: 12X10 = 120W; Monitor the camera power: 12X2 = 24W; Current point of view: 10A divided by 2A = 5; Power point of view: 120W divided by 24W = 5; So you can install five (the same voltage, the current and power which is less, with that standard).

Q:Switching power supply management IC FB, CS, DEM specific what role ah

FB is the voltage feedback, CS is the current feedback, DEM do not know, it is best to send the chip, the different circuit function is not the same. Such as constant current output circuit FB is the current feedback!

Q:Switching power supply CE certification is probably how much money

Or how much money, there are two or three thousand cheap, you have seven or eight points, of course, the requirements of high, then there are more than ten thousand, specifically look at your needs, look at my name in detail

Q:What is the linearity of switching power supply

Linear adjustment rate for the input voltage maximum and minimum output voltage stability indicators, but this provision has a number of standards to 220V, for example, if you specify a maximum of 264, the minimum is 185V, Vof said full load when the output voltage, there are three algorithms : The algorithm is as follows: ??? ATE which in the end with which one, you will test the report out to count about. I used to use the CHROMA6000, which is the formula inside the dead, but CHROMA8000 as if you can modify their own. For only a set of outputs, there is a LOAD REGULATION is the load regulation rate, Von said no load when the output voltage, the algorithm is as follows: ???? Respectively, called the normal voltage load regulation, high pressure load regulation, low voltage load regulation. When there are multiple sets of output, one or more of the output with overloaded but no load output increases due to the increase in duty cycle, relative to the original increase in the number of cross-load regulation is called Accuracy range, because each group must be set at least once overload or light load to observe the other output of the situation, so called cross adjustment.

Q:What are the LLVD and BLVD in the switching power supply?

(LLVD) a power down; ????(BLVD) secondary power; The so-called power, the second power is on the switching power supply (power cabinet) said. Often, the electrical equipment of the power plant and substation is divided into two main categories: equipment and secondary equipment. A device: refers to the direct use of electrical equipment for the production, transmission and distribution of electricity, through the completion of these equipment to produce electricity and power to the user's task. By a certain device connected according to a certain law for the completion of the power of the hair, change, lose, with the task of the composition of the circuit, known as the electrical main wiring, also known as a circuit or a system. Secondary equipment: refers to the work of a device to monitor, measure, operate and control equipment. The circuit that represents the secondary device interconnection relationship is called secondary wiring, also called secondary circuit or secondary system.

Q:Led switching power supply used in what place

Switching power supply used in the LED driver, the high-end switching power supply, low-end general resistance with the buck circuit can be.