Switching power supply for inversion device of communication machine room

The invention relates to the technical fields of power sources and electronics, and particularly provides a switching power supply for an inversion device of a communication machine room. The switching power supply comprises a high-frequency transformer, a multi-path output rectification filtering and voltage stabilization circuit and a switching power supply controller, wherein a primary winding of the high-frequency transformer is externally connected with a power supply, and an auxiliary winding of the high-frequency transformer is connected with the multi-path output rectification filtering and voltage stabilization circuit; the multi-path output rectification filtering and voltage stabilization circuit comprises pi type capacitive reactance high-frequency filtering circuits, common-mode filtering capacitors and voltage stabilization chips. The switching power supply further comprises a voltage feedback and error compensation circuit and a driving and buffer circuit, wherein the switching power supply controller is connected with a feedback winding of the high-frequency transformer through the voltage feedback and error compensation circuit, and is connected with the primary winding of the high-frequency transformer through the driving and buffer circuit. According to the switching power supply, the voltage feedback and error compensation circuit and the multi-path output rectification filtering and voltage stabilization circuit are arranged, so that a stable and reliable power supply with smaller voltage ripples can be provided for the inversion device of the communication machine room.