Large-current pulse power supply output calibration method and device and electronic equipment

Abstract

The invention provides a large-current pulse power supply output calibration method and device, and electronic equipment. The method is applied to an ATE equipped with a universal meter, a voltage and current source and a load. The load is connected with a voltage measuring unit and a current measuring unit; determining a target resistor in the load according to the to-be-calibrated voltage gear and the to-be-calibrated large current gear, controlling the universal meter to measure the resistance value of the target resistor, and calibrating the voltage measurement unit based on the to-be-calibrated voltage gear; switching the voltage and current source to a to-be-calibrated large current gear; the gears correspond to a plurality of calibration point current values; based on the current measurement unit, the calibrated voltage measurement unit and the resistance value, determining corresponding actual current values and measured current values when the voltage and current source outputs the current values of the plurality of calibration points; and calculating a calibration coefficient corresponding to the to-be-calibrated large-current gear. The method is easy to implement and low in cost, can traverse the whole large-current gear range, can ensure the output precision of the large-current gear full range, and meets the high-precision calibration requirement.

Description

technical field [0001] The present application relates to the technical field of power calibration, in particular to a large current pulse power output calibration method, device and electronic equipment. Background technique [0002] The high-current pulse source is an important part of the voltage and current source used by ATE. As a device for mass production of semiconductor packaging and testing, it is different from laboratory measuring instruments that generally require manual calibration. For the convenience of packaging and testing manufacturers, ATE usually needs to adjust the voltage used. The current source is automatically calibrated to guarantee its output and measurement accuracy. There are many calibration items, among which the most commonly used calibration items are: voltage output calibration, voltage measurement calibration, current output calibration, current measurement calibration. [0003] For current output calibration and current measurement calib...

AI Technical Summary

Problems solved by technology

Many complex calibration algorithms are essentially solving the problem of the impact of output linearity on output accuracy

Therefore, in order to ensure the validity of the calibration, the common voltage and current source needs to set the voltage and current value during calibration, which requires the output capability of the entire power supply. It cannot withstand such a high current, and the high-precision high-current pulse power supply outputs a large current for a short time, generally only a few milliseconds, which is far less than the hundreds of milliseconds required by the multimeter to complete the measurement. Therefore, the existing technology is performing high-precision large-scale When calibrating the current pulse power supply output, the current setting value will not be selected according to the full scale. The existing technology will only uniformly take points in the small range that the multimeter can measure and the voltage and current source can output for a long time, and Correcting the calibration coefficient of the high current range according to the calibration results of the small range will obviously lead to great risks, and the calibration accuracy is far from meeting the requirements

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