Multi-output train control power supply circuit

The utility model relates to a multi-output train control power supply circuit, which belongs to the design field of a DC-DC converter and comprises a half-bridge resonant conversion module, a transformer, a rectifying and filtering module, an output voltage module, a feedback module, a PFM (Pulse Frequency Modulation) control module, an over-current detection module and a driving module, the circuit adopts a half-bridge LLC resonant converter topological structure, zero-voltage switching-on (ZVS) of a primary-side switching tube and zero-current switching-off (ZCS) of a secondary-side rectifying tube within a full-load range can be realized by using a magnetizing inductor of a transformer without any auxiliary network, primary-side circulating current energy loss and switching tube switching-off current stress are reduced, and high conversion efficiency is achieved; and by adopting a stacked winding method of the high-frequency transformer and closed-loop adjustment of all output loops, the leakage inductanc