| 摘要 |
A switch power supply isolation circuit comprises a switch device, a signal unidirectional transmission device, a unidirectional conduction device, an inductor and a control module. The switch device and the inductor are orderly connected in series with a voltage source to form a power supply circuit; the unidirectional conduction device, the inductor and the signal unidirectional transmission device are orderly connected in series with a load to form a load circuit; the switch device and the signal unidirectional transmission device are connected with the control module so as to be controlled by the control module; under the control of the control module, when the switch device is switched on, the unidirectional conduction device is switched off, the power supply circuit operates, and energy is accumulated in the inductor; and when the switch device is switched off, the signal unidirectional transmission device is switched on, the load circuit operates, and the inductor releases the energy to power the load. The inductor is used to power the load, and the signal unidirectional transmission device and the unidirectional conduction device are used to realize electrical isolation. Therefore, the switch power supply isolation circuit has the advantages of small size, high efficiency, low cost, etc. |
