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http://dx.doi.org/10.22156/CS4SMB.2021.11.06.007

A Study on the Stabilization of Generating Negative Voltage for IT Equipments using Microcontroller  

Lee, Hyun-Chang (Division of Information & Telecommunication, Kongju National University)
Publication Information
Journal of Convergence for Information Technology / v.11, no.6, 2021 , pp. 7-13 More about this Journal
Abstract
In this paper, the function of starting the negative voltage used in the IT equipment when it is generated and the method of controlling it using a microcontroller for the function to detect the overload and respond to it are presented. To do this, the limitations of the existing negative voltage generation circuit and the problems that occur during overload were analyzed, and a circuit that detects and controls the overload condition without a separate current sensing circuit was presented. In order to confirm the effect of the proposed method, an experiment was conducted by configuring an experimental circuit. As a result of the experiment, compared to the existing negative voltage generation circuit, which falls into a latch-up state when overloaded and enters a dangerous state, the proposed circuit detects this, stop the operation of the circuit, and informs the user of such an abnormal state to take action. have. In addition, since the starting point of the circuit is determined according to the system state, the experimental result was confirmed that the starting time was significantly shortened by about 23% compared to the time switch method.
Keywords
Buck; Inverter; Negative voltage; Microcontroller; Voltage inverter;
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