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    DIGITAL CONTROL UNIT HAVING A TRANSIENT DETECTOR FOR CONTROLLING A SWITCHED MODE POWER SUPPLY
    3.
    发明公开
    DIGITAL CONTROL UNIT HAVING A TRANSIENT DETECTOR FOR CONTROLLING A SWITCHED MODE POWER SUPPLY 有权
    与瞬态探测器数字控制单元用于控制开关式电源

    公开(公告)号：EP2671312A2

    公开(公告)日：2013-12-11

    申请号：EP11702976.9

    申请日：2011-02-02

    申请人： Telefonaktiebolaget L M Ericsson (PUBL)

    发明人： KARLSSON, Magnus ,  BORGENGREN, Henrik ,  KULLMAN, Anders ,  MALMBERG, Jonas ,  WAHLEDOW, Fredrik

    IPC分类号： H02M3/157 ,  H03K5/1534 ,  H02M3/156 ,  H02M3/335

    CPC分类号： H02M3/156 ,  H02M2001/0022

    摘要： A switched mode power supply (SMPS) comprising a feedback unit, voltage feed forward (VFF) compensation signal generator and a transient detector. A VFF compensation signal is only applied to the output of the feedback unit when a transient is detected by the transient detector on the input voltage of the SMPS, thereby saving power and computation time. The transient detector comprises a first comparator to detect that a positive transient has occurred if a difference signal is greater than a positive threshold level; a second comparator to determine if the difference signal is within a predetermined range of positive values and output a result that indicates if the difference signal is within the predetermined range of positive values; and a first calculator to detect that a positive transient has occurred if, out of a first predetermined number of consecutive results of the output of the second comparator, there is at least a second predetermined number of results indicating that the difference signal is within the predetermined range of positive values. The transient detector comprises further features for similarly detecting a negative transient.