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Analysis of Problems when Generating Negative Power for IT devices

  • Journal of Software Assessment and Valuation
  • Abbr : JSAV
  • 2020, 16(2), pp.109-115
  • Publisher : Korea Software Assessment and Valuation Society
  • Research Area : Engineering > Computer Science
  • Received : November 30, 2020
  • Accepted : December 21, 2020
  • Published : December 31, 2020

Jun,Ho-Ik 1 Lee HyunChang 2

1혜전대학교
2공주대학교

Candidate

ABSTRACT

In this paper, the problem that occurs when negative voltage is generated using an inexpensive buck device in an IT device that is supplied with a single power by an adapter or battery is analyzed. For the cause analysis, the principle of operation of the buck device and the principle of the inverter circuit were examined, and the circuit characteristics of the inverter circuit were analyzed using the buck device. As a result of the analysis, it was confirmed that the inverter circuit using the buck device initially needs a large starting current, and in particular, in the case of a current capacity that is less than the starting current in the circuit that supplies power, it was confirmed that it could fall into a state similar to the latch-up phenomenon. In order to confirm the analysis result, an experimental circuit was constructed and the input current was checked. If the supply current is sufficient, it is confirmed that over-current flows and starts. If the supply current is insufficient, the circuit cannot start and a latch-up phenomenon occurs.

Citation status

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