What is a switching power supply?
Switching power supply is a power converter that uses switching devices to continuously turn on and off at high frequencies; energy storage devices such as capacitors and inductors are powered in the non-conducting state of the switching devices. The power supply has an efficiency of up to more than 90%, is small in size, and is widely used in sensitive electronic equipment such as computers. Basic switch mode power supplies are classified according to the power supply input and output voltages. The four main groups are:
- AC to DC-Offline DC Power Supply
- DC to DC-Converter
- DC to AC-Inverter
- AC to AC-Cycle converter for inverter
What is a switching converter?
A switching converter is short for circuit topology, which, as the name implies, means that it is used to convert electrical energy. It is the core of a switching power supply. General switching power supply design, the first thing to determine the type of converter, that is, what kind of converter (what is the main circuit topology), and then design the parameters of the main circuit, inductors, capacitors and other values are how much, and then is the control circuit, with what kind of control method, and so on. The control circuit is actually mainly how to add drive to the main circuit of the switch tube, switch tube with the conductivity to form the output waveform. There are also some circuits to add protection circuits and so on. Switching power supply design is very experienced, and there is no standard answer, just good or bad performance.
Switching converter is the core component of modern power conversion technology, and is also the basic component unit of various switching power supplies, inverters, UPS, photovoltaic power generation, capacitance type wind power generation, LED lighting and other systems, which are widely used in electric power, communications, home appliances, railroad transportation, automotive electronics, industrial control, instrumentation, aviation, aerospace, navigation and other fields. Switching DC converter power supply is the use of modern power electronics technology to control the time ratio of switching on and off to maintain a stable output voltage of a power supply, switching power supply is generally composed of pulse width modulation control.
Switching power supply and linear power supply compared to the cost of both with the increase in output power and growth, but the rate of growth of the two different. The cost of a linear power supply is higher than that of a switching power supply at a certain output power point, which is called the cost reversal point. With the development and innovation of power electronics technology, making switching power supply technology is also constantly innovating, this cost reversal point is increasingly moving to the low output power end, which provides a broad space for the development of switching power supply.
How to classify switching power supply DC-DC converter modules?
Switching power supply is a power supply that uses modern power electronics technology to control the time ratio of switching transistors to turn on and off to maintain a stable output voltage, switching power supplies are generally controlled by pulse width modulation.
Compared to linear power supplies, the cost of both grows with the increase in output power, but the rate of growth varies. The cost of a linear power supply is higher than that of a switching power supply at a certain output power point, which is called the cost reversal point.
With the development and innovation of power electronics technology, making switching power supply technology is also constantly innovating, this cost reversal point is increasingly moving to the low output power side, which provides a broad space for the development of switching power supply.