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Techniques to Diagnose Short-Circuit Faults in the Switching Mode Power Supply for Display
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 Title & Authors
Techniques to Diagnose Short-Circuit Faults in the Switching Mode Power Supply for Display
Lee, Jae-Won; Chun, Tae-Won;
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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.
Analog tester;Short-circuit fault;Switching Mode Power Supply (SMPS);
 Cited by
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