Is it still feasible to do switching power supply now? Now it s all LED power.

From household appliances, electric vehicles, automobiles, to aerospace, all fields that need to use electricity are now more and more inclined to apply switching power supplies, which are inseparable from the unique advantages of switching power supplies themselves.

Nowadays, switching power supply products are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instrumentation, medical equipment, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, liquid crystal displays, LED lamps, communication equipment, audio-visual products, security, computer cases, digital products and instruments and other fields (excerpts).

Domestic companies engaged in this area are mainly concentrated in the southeast coastal area, especially in Zhejiang and Guangdong, and the treatment is very good. Comparatively speaking, the north is slightly inferior.

If you want to engage in this part, you need to have a solid foundation of hardware circuits, and you must do more research, do more experiments, persist in it, within five years, you will definitely succeed, and then take a senior engineer certificate, and the rest of your life will be better.

I wish you success in your career!!

LED switching power supply does not need rectifier!

Three conditions for LED switching power supply.

1. Switch: power electronics work in a switching state instead of a linear state 2. High frequency: power electronics work at a high frequency rather than a low frequency close to the power frequency 3. DC: The output of the switching power supply is DC instead of AC.

The LED switching power supply is a circuit to control the switch tube and carry out high-speed pass-through and cut-off. It converts direct current into high-frequency alternating current to transform the voltage of the converter to generate one or more sets of voltage required! The reason for converting to high-frequency alternating current is that the efficiency of high-frequency alternating current in the transformer circuit is 50Hz or 60Hz higher than that of mains.

Therefore, the switching power supply transformer can be very small, and it will not be very hot when the switching power supply is working, and the product is lower than the power frequency DC regulated power supply If you do not change 50Hz or 60Hz to high-frequency electricity, then the switching power supply has no meaning. The switching power supply can be roughly divided into isolation and non-isolation, which is an isolated type must have a switching power converter, and a non-isolated type may not necessarily have a switching power supply converter. Compared with traditional DC power supplies, switching power supplies have the advantages of small size, light weight, and high efficiency.

In fact, the LED power supply circuit is mostly composed of switching power supply circuit + feedback circuit, and the feedback circuit is sampled from the load to adjust the duty cycle or frequency of the pulse of the switching circuit to achieve the purpose of controlling the output of the switching circuit.

The biggest difference is that the LED power supply is a constant current source, and the general switching power supply is a constant voltage source. The design difficulties of LED switching power supply are volume and price. LED power supply first:

1. The requirement must be cross-current. 2. Low temperature, low heat, long life. 3. Small volume.

4. Waterproof, anti-corrosion, anti-static. 5. High-frequency pollution. Ordinary power supplies and low-quality LED power supplies are seriously polluted by high frequency, and the output DC waveforms are very complex even if the inductance is applied and the large capacitance is filtered.

Poor power supply, the power supply itself may not be bad, but the LED life and light decay are greatly reduced.

AC stands for AC voltage and DC stands for DC voltage.

Answer: LED switching power supply can not only supply power to LED power, in fact, LED switching power supply can supply power to other types of electronic equipment. Disturbance.

Explanation: LED switching power supply is an efficient and stable DC power supply, which can convert AC power into DC power and realize the switching function through circuit control. Although it includes LEDs in its name, in fact, LED switching power supplies do not only power LEDs.

Its output voltage, current and power can be adjusted according to actual needs, which can meet the power supply needs of different types of electronic devices.

Expansion: The advantages of LED switching power supply are stability, high efficiency and energy saving, so it has been widely used in electronic equipment. In addition to LED luminaires, it can also power other electronic booths and devices such as laptops, mobile phone chargers, routers, audio equipment, etc.

At the same time, the LED switching power supply also has the functions of overload protection, over-temperature protection, short-circuit protection, etc., which can ensure the safe use of the equipment.

Answer: LED switch electric jujube source can not only supply power to LED, it can supply power to other electronic products and equipment, provided that its output voltage and current meet the requirements of the slag standby to be supplied.

Explanation: LED switching power supply is an adjustable power supply, and its output voltage and current can be adjusted according to your needs. The output voltage of LED switching power supply is usually 12V, 24V, 36V, etc., and the output current can range from a few hundred milliamps to several amps.

Therefore, as long as the voltage and current of the powered equipment are within the output range of the LED switching power supply, the LED switching power supply can supply power to it.

Expansion: The output voltage and current of the LED switching power supply can be adjusted by knob or switch, so it is very convenient and practical. In addition to LED strip light and year, LED tube, LED screen and other LED products, LED switching power supply can also supply power to some equipment that needs stable voltage and current, such as wireless routers, audio, power tools, etc.

Answer: It doesn't have to be empty oak. LED switching power supplies can power LEDs, but they can also supply power to other loads.

Explanation: LED switching power supply is a kind of power supply **, its main function is to convert the input voltage into a constant output voltage and current to supply LED lights. However, in practical applications, LED switching power supplies can be applied to other old car loads, such as electronic equipment, instrumentation, etc.

Because it has the advantages of high efficiency and high precision, it can meet the needs of a variety of different loads.

Expansion: LED switching power supply is an important part of LED lighting, and its stable, efficient and reliable characteristics make LED lighting more and more popular in the market. At the same time, with the continuous innovation of technology, LED switching power supply is also constantly upgrading, such as wireless charging technology, intelligent control technology, etc., which brings more possibilities for the development of LED lighting industry.

Answer: Not necessarily, the LED switching power supply can supply power to other low-voltage electrical appliances, but the local reform needs to meet the voltage and current requirements of the electrical appliances.

Explanation: LED switching power supply is a special power supply, its output voltage and current are usually relatively low, suitable for LED strip light, LED display and other low-voltage electrical appliances to power supply. However, if the voltage and current requirements of other low-voltage appliances match the voltage and current output of the LED switching power supply, then the LED switching power supply can also supply power to these appliances.

The output voltage and current of LED switching power supply are usually relatively stable, and there is a protection mechanism, which can effectively protect electrical appliances from too high or too low voltage. Therefore, LED switching power supply is not only suitable for LED strip light and LED display, but also can be used for other low-voltage electrical appliances, such as wireless routers, cameras, etc.

However, it should be noted that the output voltage and current requirements of the LED switching power supply match the voltage and current requirements of the electrical appliances, otherwise there will be adverse consequences.

No. LED switching power supply is usually designed for LED lighting, it can power LED and control the brightness of LED to a certain extent. But LED switching flutter plexus power supplies are not limited to just powering LEDs.

LED switching power supplies can supply power to other kinds of loads, such as some applications that require stable power output, such as DC motors, electronic equipment, etc. LED switching power supplies are generally able to be lifted and compatible with these applications as long as the appropriate adjustment and control circuitry is used.

However, it should be noted that if you use LED switching power supply to supply power to other loads, you must select the correct power, voltage and current parameters according to the needs of the actual load, otherwise it may cause damage to the load and even lead to dangerous situations such as fire. At the same time, it is important to comply with all relevant safety standards and to install and use the product correctly.

Answer: LED switching power supply is not only about supplying power to LED. The sedan car bumps.

Explanation: LED switching power supply refers to a type of power supply, whose output voltage and current can be adjusted according to needs, suitable for a variety of electronic devices. Although the name includes "LED", it does not mean that it can only power LED.

In fact, LED switching power supplies can also power other types of electronic devices, such as computers, mobile phones, etc.

Expansion: LED switching power supply has a variety of characteristics, such as high efficiency, good stability, small size, etc., so it has been widely used in electronic closed talk equipment. In addition, with the development of LED lighting technology, LED switching hall side sources have also been widely used in the field of LED lighting.

LED switching power supply is a kind of transformer power supply that converts 230V 110V AC voltage into constant DC voltage, which is used to provide power conversion and protection for LED lights. The LED switching power supply is mainly designed to focus on LED lighting applications, so it can only provide a stable electric pin source for LED lamps under rated load.

LED switching power supply is mainly designed for LED lighting, so it can only supply power to LED. The working voltage of LED lights is generally low-voltage direct current, such as 3V, 5V, 12V, etc., and the LED switching power supply can convert the 230V 110V AC voltage into the stable DC power supply required by the LED lights.

Due to the relationship between the circuit structure, the LED switching power supply can be used to drive other loads before being buried, because this may lead to adverse consequences such as unstable voltage and excessive current. Therefore, when using an LED switching power supply, it is important to make sure that it is only used for LED lights, and if you need to power other loads, you should use other types of bending power supplies for power supply.

LED switching power supply is a type of power supply used for LED lamps and lanterns, usually using switching conversion power supply technology, which is more energy-efficient and stable than traditional linear power supplies. Although LED switching power supplies have LEDs in their name, they can actually be used in some other devices as well.

Parameters such as output voltage and current of LED switching power supply are designed according to the power and current demand of the LED lights used, for example, a 30W LED light in a sock hall usually needs a current of more than 2A and a voltage of about 30V to work properly. However, if the output voltage and current of the power supply meet the operating requirements of other electronic devices, the device can also be powered by LED switching power supplies. However, when using, it is necessary to inform or pay attention to whether the output voltage and current parameters meet the requirements of the equipment, so as to avoid problems such as equipment burning out.

Although LED switching power supplies have dimming functions, different power supplies may cause problems such as flickering and noise when dimming, and it is recommended to choose an LED switching power supply suitable for specific lamps to avoid these problems.

In our daily life, home decoration is now more environmentally friendly and economical, such as LED lights that we can often see and use. In the field of lighting, it is the trend of the future. And the most important part, the quality of the switching power supply is related to the life of the LED lighting product, so the failure of many products is related to the switching power supply.

Therefore, Mom.com will take you to understand what LED switching power supply is today.

The working principle of the LED light switching power supply.

LEDs are made of III-I V compounds, such as gallium arsenide, gallium phosphide and other semiconductors, and its core is a PN junction. Therefore, it has the I-N characteristics of the general p-n junction, with directional cut-off, breakdown characteristics, and luminescence characteristics. The switching power supply is an indispensable part of LED lights, and its performance is directly related to the safety and reliability of LED lighting products.

Because the key components inside the switching power supply work in the high-frequency switching state, the power consumption is small, the conversion rate is high, and the volume and weight are only 20% to 30% of the linear power supply, so it has now become the mainstream product of the regulated power supply.

The circuit composition of the LED light switching power supply.

The main circuit components of switching power supply are: input electromagnetic interference filter, rectifier filter circuit, power conversion circuit, PWM controller circuit, output rectifier filter circuit. Among them, the auxiliary circuits include input over-voltage and under-voltage protection circuits, output under-voltage protection circuits, output over-current protection circuits, output short-circuit protection circuits and so on.

After reading the article, we also have a good understanding of the working principle of the LED light switching power supply and the circuit composition of the switching power supply. In terms of energy saving, LED lights are a product that is very noisy and stuffy. As the most important component of the switching power supply, its importance is obvious.

Because it will burn out. Big pants.

The LED lamp power supply can not be replaced by a switching power supply, because any circuit needs to have a reaction time, and the working device in the circuit is the PN junction in the semiconductor can only react after the power supply gives a sampling signal, and the PV junction of the LED directly begins to work, so its "reaction" is faster than the "many PN junctions matching" in the circuit, and it will be burned out in advance.