A device for testing the function of the adjustment terminal of power supply products

Abstract

The invention provides a device for testing the function of the adjustment terminal of a power supply product, including: an external voltage module, a sensitivity control module for providing different test sensitivities, a photoelectric isolation module for converting an external input voltage into an optical signal, and then The optical signal is converted into a corresponding electrical signal output, and the active resistance module controls the resistance value of the active adjustable resistance; by changing the input voltage of the external voltage module, a control signal corresponding to the input voltage is obtained to complete the active resistance The adjustment of the resistance value of the active adjustable resistor in the module, the invention has the characteristics of simple control, convenient use, and strong reliability, which improves the degree of automation and product adaptability. The invention can respond quickly during the test process, and is especially suitable for In the automatic test and test environment with isolation requirements, it is especially suitable for harsh application environments such as high voltage and interference, and during the test process, the output voltage changes smoothly, avoiding the occurrence of sudden changes in the output voltage.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a device for testing the function of an adjustment terminal of a power supply product. Background technique [0002] In DC / DC and other power supply products, many products, such as SynQor, Vicor, SWH65-S and VPT series products, have output voltage adjustment terminal (TRIM) at the output terminal, and the TRIM terminal and output terminal (Vo) or output ground Connect an adjustable resistor between terminals (GND), and the output voltage value can be changed by adjusting the adjustable resistor value, which is convenient for users to adjust the output voltage according to the application when using standard output products. [0003] At present, most of the function tests of the adjustment terminal are to select the test port through a single-pole double-throw switch, and then either manually adjust the traditional adjustable resistor, or use a motor to replace the manual adjustment o...

AI Technical Summary

Problems solved by technology

When the traditional potentiometer is adjusted by manual or electric mechanism, the response is slow, the potentiometer is easy to wear after long-term use, the reliability is poor and the degree of automation is low; when the digital potentiometer chip is used, the operating voltage is low, and cannot be higher than the chip power supply voltage, resistance value Adjusted to a step change, not smooth, and the digital potentiometer chip is a non-isolated type, which will damage the device under test in the environment of high voltage output

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