The utility model provides a
dummy load device for
laser power supply debugging, which comprises n groups of load
diode arrays, a
relay, a power supply module and a
control circuit, the load
diode arrays are sequentially numbered, each group is sequentially provided with 2, 4,..., 2n diodes connected in series, the
relay is connected with the power supply module, the
relay is connected with the power supply module, and the
control circuit is connected with the relay. The load
diode arrays are connected in series according to a serial number sequence, relays are arranged between the first and last load diode arrays and the
control circuit and between the load diode arrays, normally closed ends of the relays are connected with the diode arrays to form
backflow, and a connecting circuit is arranged between the adjacent relays. The connecting circuit is connected with the normally open ends of the relays, the control circuit is controlled by adopting a single-
chip microcomputer system and is connected with and controls a switch of each relay, and the power supply module supplies power to the control circuit. The device is easy to regulate and control, and has a current monitoring function, a
voltage protection function and an over-temperature protection function.