What is the best linear regulated power supply or switching power supply?
Everything has two sides, depending on how to use? Before using, think of their respective advantages and disadvantages, and then combined with the actual situation, to avoid the disadvantages of using the advantages is good.
Nowadays, a wide range of electronic equipment, used in all aspects of life, certainly can not be separated from the power supply, the vast majority of electronic equipment and DC voltage regulator to provide power. Therefore, the quality and reliability of the power supply is directly related to the safety and technical indicators of electronic equipment. Speaking of DC regulated power supply is nothing more than a linear regulated power supply switching power supply two categories.
Linear regulated power supply principle
With an error amplifier to capture the feedback signal, and then control the MOS tube or transistor gate signal, and then control the current flow through the transistor to control the regulator's voltage drop, and ultimately regulate the output DC power supply.
Switching power supply
Its theoretical basis is power electronics technology, the switching state is due to its function tube working in the saturation region or cut-off region, and ultimately through the control of the controlled device on-off time ratio to achieve the regulated output voltage.
Switching power supply working principle
The feedback signal is captured with an error amplifier, which then controls the gate switch of the MOS tube or transistor to achieve energy storage operation through the transistor to ensure stable DC voltage output.
Difference between switching power supply and linear regulated power supply
Linear regulated power supply works in the square large area, large heat, low efficiency, ripple, but requires a larger volume of heat sink and larger volume of the transformer, multi-channel voltage output transformer volume is larger.
Switching power supply regulator tube working in the saturation and cut-off area, heat small efficiency, large volume transformer to save, but the DC output voltage will be superimposed on the larger ripple.
Conclusion; linear regulated power supply and switching power supply which is good to use? Combined with the actual application, play their respective advantages to avoid disadvantages. For example, the ripple requirement is small, the pressure difference, small current, analogue signal processing system, etc., linear regulated power supply has obvious advantages. For example, portable electronic products, lifting voltage, care about efficiency and heat dissipation, switching power supply has obvious advantages.
