| Title |
Techniques to Diagnose Short-Circuit Faults in the Switching Mode Power Supply for Display |
| Authors |
이재원(Lee, Jae-Won) ; 전태원(Chun, Tae-Won) |
| DOI |
https://doi.org/10.5370/KIEE.2016.65.7.1186 |
| Keywords |
Analog tester ; Short-circuit fault ; Switching Mode Power Supply (SMPS) |
| Abstract |
This paper proposes techniques to diagnose short-circuit faults of both the diodes and power FET in switching mode power supply (SMPS) by using a simple analog tester. The diodes in full-bridge rectifier, power FET, switching transformer, and some sensors are modelled with resistor. The total resistance value measured at the input terminal of a SMPS is analyzed when the short-circuit faults of diodes in a full bridge rectifier or power FET are occurred. The short-circuit faults of one or two diodes in a full bridge rectifier, power FET, and both the diodes in a full bridge rectifier and power FET can be detected by a range of total resistance, which is measured by the analog tester. Through experiments, the theoretical analysis for total resistance under short-circuit faults can be verified. |