Patent ID: 9740262
Date: 2017-08-22
CPC Classifications: G01R,G05F,G06F,H02M

Claim:
1. A power supply detecting circuit comprising: a first voltage detecting module, connected to an input terminal of a power supply module, and configured to detect an input voltage of the power supply module; a micro control unit (MCU) connected to the first voltage detecting module; a display module connected to the MCU; a second voltage detecting module, connected to an output terminal of the power supply module, and configured to detect an output voltage of the power supply module; and a current detecting module, connected to the output terminal of the power supply module, and configured to detect an output current of the power supply module; wherein the current detecting module comprises a transformer, a second amplifier, and a current detecting circuit; the current detecting circuit comprises a resistor, a capacitor, and two diodes; the transformer is connected to the input terminal of the power supply module; the transformer comprises a secondary coil; the resistor of the current detecting circuit is connected between two output terminals of the secondary coil; the two diodes and the capacitor of the current detecting circuit are capable of rectifying and filtering a signal output by the transformer and sending the rectified and filtered signal to the second amplifier; the MCU is capable of comparing the detected input voltage of the power supply module, the detected output voltage of the power supply module, and the detected output current of the power supply module with corresponding predetermined parameters and calculating an output power of the power supply module; and the display module is capable of displaying the detected input voltage of the power supply module, the detected output voltage of the power supply module, the detected output current of the power supply module, and the output power of the power supply module.