Low-voltage capacitance testing system and method

Abstract

The invention discloses a low-voltage capacitance testing method. The control terminal sets a circuit conduction threshold value, detects whether the circuit conduction threshold value meets the requirements, if yes, executes the next step, if not, resets it; micro constant current charging The unit charges the capacitor to be measured; the voltage detection unit measures the voltage value on the capacitor to be measured, and generates capacitance voltage data; the frequency detection unit measures the voltage value of the capacitor to be measured to generate frequency data; the voltage amplification unit amplifies the capacitor voltage data and generates Generate voltage amplification data; the control unit calculates the data of the capacitor to be tested according to the voltage amplification data and the frequency data. By using the constant current discharge unit and the micro constant current charging unit to perform capacitance detection, the capacitance detection can be performed under the condition that the internal circuit of the IC is not conducting, and the charging of the capacitor will not be affected at the same time, which increases the accuracy of measurement and solves the problem of capacitance. The problem of inaccurate value testing. The invention also discloses a low-voltage capacitance testing system.

Description

technical field [0001] The invention relates to the field of testing, in particular to a low-voltage capacitance testing system and method. Background technique [0002] At present, the PCBA motherboard refers to the most basic and most important printed circuit board of the microcomputer, on which the main circuit systems that make up the computer are installed, generally including BIOS chips, I / O control chips, buttons, panel control switch interfaces, and indicator lights. components, expansion slots, and DC power supply plug-ins for motherboards and cards. [0003] With the increasing update of technology, the integration of electronic products is getting higher and higher, and the functionality is becoming more and more powerful. Almost most products have capacitors, which need to be tested to verify their functions. Among them, capacitance testing has become the priority testing requirement of some companies, so that the designed PCBA can be quickly tested and verifie...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies in the prior art, one of the purposes of the present invention is to provide a low-voltage capacitance testing system and method, which can solve the problem of inaccurate capacitance value testing

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