20160043654 | SWITCHING POWER SUPPLY ISOLATION CIRCUIT - A switching power supply isolation circuit comprises a switching device, a signal unidirectional transmission device, a unilateral connecting device, an inductance and a control module, wherein the switching device, the inductance and a voltage source are connected in series to form a power supply loop, and the signal unidirectional transmission device, the unilateral connecting device, the inductance and a load are connected in series to form a load loop, both of the switching device and the signal unidirectional transmission device being connected with and controlled by the control module. When the switching device is turned on, the signal unidirectional transmission device is turned off, thereby the inductance starts to store energy; and when the switching device is turned off, the signal unidirectional transmission device is turned on, thereby the inductance starts to releases energy. The present invention has advantages of small volume, high efficiency and low cost. | 02-11-2016 |