A Step up step down non-isolated DCDC converter using Average Current Mode (ACM) control is described. Specific automotive requirements and the corresponding DCDC topology adaptations are discussed. Comparison of several topologies is discussed and motivation for choosing ACM is explained. Topology of the whole converter is shown with a link to the DCDC die floor plan. Specific sensitive blocks are elaborated in more detail such as the accurate coil current sensing, where the schematics of the common structures for all three modes (boost, buck-boost, and buck) are described. The block layout is also depicted. Measured results on manufactured silicon verify the functionality and the high DCDC robustness for the automotive field. EMC results, which fulfil required automotive standards, are included.


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    Title :

    Robust DCDC converter for automotive applications


    Contributors:


    Publication date :

    2009


    Size :

    33 Seiten, 34 Bilder, 1 Tabelle, 5 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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