2021/11/09
The switch power supply primarily refers to a high-frequency switch-type DC regulated power supply made using various new self-shutting devices and conversion technology. The switch power supply is known as an efficient and energy-saving power supply, representing the development direction of regulated power supplies, and has become the mainstream product of regulated power supplies. Below, I will introduce the advantages and disadvantages of five classic switch power supply structures.
2021/11/09
What are the main sources of electromagnetic interference in switch-mode power supplies?
The circuit is the most basic element that keeps the switch power supply running. Therefore, in terms of switch power supplies, the electromagnetic interference caused by the switching circuit is a source of interference within the switch power supply, and its impact on the switch power supply is significant, potentially causing serious damage. As the core of the switch power supply, the main components are the switching tube and the high-frequency transformer. The quality of these two main components also has a great impact on the switching circuit, so the quality of the switching tube and the high-frequency transformer is extremely important in the switching circuit.
2021/11/09
Overview of Switching Power Supply
The switch power supply, also known as the switching power supply or switch converter, is a high-frequency power converter. The function of the switch power supply is to convert one voltage into the voltage or current required by the user through various methods. The switch power supply plays a significant role in our daily electricity usage, as it can improve unsuitable voltages or currents, save electricity to a certain extent, and also provide a certain level of safety for residents' electricity consumption.
2021/11/09
Switching power supply control methods
The control methods of switch power supplies are often issues commented on by relevant personnel, not only for the effective use of switch power supplies but also for future development. Switch power supplies can be controlled through voltage and current. To control through voltage, the converter's output voltage feedback signal is compared with the output voltage reference signal, and then the error signal of the output voltage is derived. A series of related calculations are performed to obtain the corresponding drive signal, which then drives the circuit to achieve stable output voltage of the device.
2021/11/09
Techniques for troubleshooting switch power supplies
The repair of switch power supplies can be divided into two steps: under power-off conditions, 'look, smell, ask, measure'. Look: Open the power supply casing to check if the fuse is blown, and then examine the internal condition of the power supply. If you find any burnt areas on the PCB or damaged components, you should focus on checking those components and related circuit elements.
2021/11/09
Common defects of switch power supplies
In general, a blown fuse indicates that there is a problem with the internal wiring of the power supply. Since the power supply operates under high voltage and large current conditions, fluctuations and surges in the grid voltage can cause a sudden increase in current within the power supply, leading to the fuse blowing. It is crucial to check the rectifier diodes at the power supply input, the high-voltage filtering electrolytic capacitors, and the inverter power switch transistors, to see if any of these components are shorted, open, or damaged.
2021/11/09
What are the characteristics of switch power supplies?
Switching power supplies utilize modern power electronics technology to control the on and off time ratio of the switching device, maintaining a stable output voltage. A switching power supply generally consists of a pulse width modulation (PWM) control IC and a MOSFET. With the development of power electronics technology, switching power supply technology is also continuously evolving. Currently, switching power supplies are widely used in almost all electronic devices due to their small size, lightweight, and high efficiency, making them an indispensable power supply method in the rapid development of today's electronic information industry.
2021/11/09
Introduction to the application areas of switch power supplies
A switch power supply is a type of power supply that uses modern power electronics technology to control the on and off time ratio of switching transistors, maintaining a stable output voltage. A switch power supply generally consists of a pulse width modulation (PWM) control IC and switching devices (such as MOSFETs, BJTs, etc.). Compared to linear power supplies, both types have costs that increase with output power, but the rate of increase differs between the two.
2021/11/09
What is the 3C certification standard for switch power supplies?
3C certification is a mandatory certification in China, implemented by the Chinese government to protect consumer safety and national security, and to strengthen product quality management in accordance with laws and regulations. The so-called 3C certification refers to the China Compulsory Certification system, with the English abbreviation CCC, and the 3C certification mark.
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