Why voltage stabilisation power supplies are so popular
Regulated power supply classification methods, according to the type of output power supply DC regulated power supply and AC regulated power supply; according to the connection of the regulated circuit with the load series regulated power supply and parallel regulated power supply; according to the operating state of the adjustment tube linear regulated power supply and switching regulated power supply; according to the type of circuit is divided into a simple regulated power supply and feedback regulated power supply, and so on.
Switching regulated power supply advantages and disadvantages
Advantages:
"Switching regulated power supply" and "series adjustment type regulated power supply" compared to the energy efficient; adapt to changes in the utility power capacity; wide range of output voltage adjustable; a switching tube can easily obtain a number of different voltage levels of power supply; small size, light weight and so on many advantages, and has been widely adopted. Advantages, and has been widely adopted.
(1)Small power consumption, high efficiency
(2) Small size, light weight
(3)Wide voltage regulation range
(4) filtering efficiency is greatly improved, so that the capacity and volume of the filter capacitor is greatly reduced
(5) Flexible circuit forms
Principle of operation: rectified and filtered DC voltage is provided by R1 to the base of the regulator tube, so that the regulator tube conduction, the voltage in the V1 conduction through the RP, R2 to make the V2 conduction, followed by the V3 also conduction, which is the emitter and collector of the V1, V2, V3 voltage is no longer changing (the role of the voltage regulator tube is exactly the same as the role of the regulator). Adjust RP, you can get a smooth output voltage, R1, RP, R2 and R3 ratio determines the output voltage value of this circuit.
The difference between linear regulated power supply and switching power supply
Switching regulated power supply is through the DC into high frequency pulse, and then electromagnetic conversion to achieve voltage conversion and voltage regulation. Linear regulated power supply is directly connected in series with a controllable adjusting element to divide the input DC voltage to achieve voltage conversion and voltage regulation, which is essentially equivalent to connecting a variable resistor in series.
Switching regulated power supply high efficiency, and can be boosted or buck. Linear regulated power supply can only step down the voltage, and low efficiency. Switching regulated power supply will produce high frequency interference, linear regulated power supply is no interference.
