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    • 52. 发明专利
    • Dc/dc converter and game apparatus using the same
    • DC / DC转换器和游戏机使用它
    • JP2014087185A
    • 2014-05-12
    • JP2012235020
    • 2012-10-24
    • Sony Computer Entertainment Inc株式会社ソニー・コンピュータエンタテインメント
    • SASAO KAZUKIMITSUI KAZUAKI
    • H02M3/155
    • H02M3/1588H02M3/1584H02M2003/1586Y02B70/1466
    • PROBLEM TO BE SOLVED: To provide a DC/DC converter capable of controlling the ripple amount of the output voltage not to increase when switching the number of driving phases.SOLUTION: Each of N (N: an integer more than 2) switching circuits SW1-SWN generates switching voltages Vsw1-VswN respectively on each switching node according to input pulse signals. A phase controller 16 dynamically switches the number of driving phases K (K: an integer smaller than N) according to the state of a DC/DC converter 2. A pulse modulator 20 generates a pulse signal Sthe frequency of which changes according to the number of driving phases K. A distribution section 22 selects K switching circuits from the N switching circuits SW1-SWN and distributes pulse signals S-Sto each of selected K switching circuits with a phase difference of (360/K) degree.
    • 要解决的问题:提供一种DC / DC转换器,其能够在切换驱动相位数时控制输出电压的纹波量不增加。解决方案:N(N:大于2的整数)开关电路SW1 -SWN根据输入脉冲信号分别在每个开关节点上产生开关电压Vsw1-VswN。 相位控制器16根据DC / DC转换器2的状态动态地切换驱动相位K的数量(K:小于N的整数)。脉冲调制器20产生根据数字变化的脉冲信号Sthe频率 分配部分22从N个切换电路SW1-SWN中选择K个开关电路,并且分配具有(360 / K)相位差的所选择的K个开关电路中的每一个的脉冲信号S-Sto。