The role and understand switching power supply?

   Switching power supply is also called the exchange type power source,switch converter, a high frequency power conversion device. Switching power supply is the use of modern electronic technology, the control switchturn-on and turn off time ratio, maintain a stable output voltage power supplies, switching power supply from the general pulse width modulation(PWM) control IC and MOSFET. Switching and linear power supply compared, two costs are increasing with the increase in power output, but two different growth rate. Power costs in a linear output power point, rather than switching power supply, this point is called cost inversion point. With the development of power electronics technology and innovation, making switching power supply technology is also in constant innovation. Switching power supply with the characteristics of small size, light weight and high efficiency by the electronic equipment is widely used in almost all, switching power supply and pure sine wave UPS is a kind of power supply in the way of the rapid development of electronic information industry indispensable.