The embodiment of the utility model relates to the technical field of electronic circuits, and discloses a multi-path BUCK output drive circuit, which comprises an adjustable
direct current power supply module, a multi-path BUCK module and a control module, the adjustable direct-current power supply module is connected with the multi-path BUCK module and is used for providing direct-
current voltage for each path of BUCK module; the multi-path BUCK module is connected with the multi-path load module and is used for providing working
voltage for the multi-path load module; the control module is connected with the multipath load module and the adjustable DC power supply module, and is used for obtaining the working
voltage of each path in the multipath load module in real time, and adjusting the
DC voltage output by the adjustable DC power supply module in real time according to the maximum working
voltage in all the working voltages. Through the above mode, the embodiment of the utility model realizes the effects of continuously and dynamically adjusting the
bus voltage, enabling the N paths of BUCK circuits to work in the optimal working state, ensuring that each path of output meets the required
constant current state, and having the highest conversion efficiency.