POWER SUPPLY DEVICE, OPERATING MODEL AND TEMPERATURE MEASURING METHOD THEREOF

A power supply device includes an operating circuit, a circuit measuring device and a computing circuit. The circuit sensing device is configured to continuously sense the operating circuit and obtain a data that varies over time. The computing circuit is coupled to the circuit measuring device. The computing circuit is configured to: receive the data of the operating circuit; provide the data into a deflection model to obtain a simulated temperature of the operating circuit; and determine whether the operating circuit is abnormal according to the simulated temperature. The deflection model is established through a deflection operation according to a plurality of physical parameters of the operating circuit.