Patent ID: 9625517
Date: 2017-04-18
CPC Classifications: G01R

Claim:
1. A leakage current detection method applied to leakage current detection for a board-mounted component on a printed circuit board assembly (PCBA) board, the method comprising: electrically isolating the board-mounted component under detection from other components that are electrically-connected to the board-mounted component under detection, wherein electrically isolating the board-mounted component comprises: providing a fixed voltage for the leakage current input end of a board-mounted component under detection, and connecting the leakage current output end of the board-mounted component under detection to an inverting input end of an operational amplifier of a resistance testing module, wherein the resistance testing module comprises the operational amplifier and a reference resistor that is connected between the inverting input end of the operational amplifier and the voltage output of the operational amplifier; detecting an output voltage of the resistance testing module; and calculating, based on Ohm's law and according to the output voltage and the reference resistor, a leakage current flowing through the board-mounted component under detection.