What are the differences between switching power supply, ballast and driver, and what are their respective functions?

1, switching power supply, commonly known as switching transformer, converts off-the-shelf voltage that does not meet the requirements into equipment that meets the requirements, and the conversion efficiency is relatively high, generally above 70%, which has many advantages compared with power frequency transformer;

2. Ballasts, also known as chokes and chokes, are generally only used for AC occasions and have the function of limiting AC current. Early fluorescent lamps all used this kind of passive choke, which was turned on and off when starting, generating high voltage to activate the fluorescent lamp, and then used as a current limiting "resistor" to maintain the normal operation of the fluorescent lamp;

3. Driving, that is, power amplification, amplifies a weak electrical signal into a strong or strong electrical signal to drive a driven executive component, such as an audio amplifier, to drive a speaker and make a deafening sound.

In terms of software, the driver can also be said to be algorithm software, such as video card and sound card driver. . .