This paper presents the results obtained from a study conducted to evaluate the long-term operational reliability of dc-dc power converters used in computer and telecom applications. A full-bridge, phase-shifted zero voltage switching (ZVS) PWM converter was investigated experimentally and theoretically it is shown that under low-load conditions, the intrinsic body diode of the MOSFET undergoes dynamic avalanching during its reverse recovery with an associated high dv/dt. This phenomenon results in an excessive power loss in the circuit and increased switching stress for the MOSFET. The converter failure under low-load conditions can be associated with this mechanism as one of the potential causes. The paper also presents experimental results obtained on dc-dc power converter prototypes smeared with zinc whiskers. It is shown that power supply arcing under these conditions is a potential cause of failure.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Power supply design for performance and reliability


    Contributors:
    Shenai, K. (author) / Singh, P.J. (author) / Rao, S. (author) / Sorenson, D. (author) / Chu, K. (author) / Gaylon, G. (author)


    Publication date :

    2000-01-01


    Size :

    731689 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Power Supply Design for Performance and Reliability

    Shenai, K. / IEEE | British Library Conference Proceedings | 2000


    Shrinking TWT power supply increases reliability

    Farrace, F. | Tema Archive | 1983


    Reliability analysis of aircraft power supply systems

    Raksch, Christian / Rehage, Dominick / Thielecke, Frank | Tema Archive | 2009


    Network architecture design for reliability based on ECU power supply and location

    Cui,M. / Zhao,D. / Zhang,L. et al. | Automotive engineering | 2012


    Network Architecture Design for Reliability Based on ECU Power Supply and Location

    Cui, Maoyuan / Zhao, Dongfeng / Zhang, Libo et al. | Springer Verlag | 2012