Switching power supply, what is the hard switch? What is a soft switch?
The so-called hard switch, power immediately after the output voltage, the soft switch is the voltage rise after the voltage rise output.
Hard switch is the switch, the switch voltage and current cross.
Soft switch is no cross, when the switch voltage is zero or when the switch tube current is zero off.
Hard switch is the switch in the inherent cycle, and the soft switch is different, is the use of the role of oscillation in the voltage and current is zero to open and close the switch, which greatly reduces the loss on the switch, The efficiency of the.
