| 摘要 |
<p>In a power converter (200) for supplying a controlled output (103) from an input supply (101), a plurality of transfer devices (201-204) is used to selectively couple the input supply to a distribution of storage devices (L230). In a high-current mode, each of the transfer devices (201-204) and associated storage device (L230) is used to couple the input supply to the controlled output. In a minimal-current mode, each of the transfer devices (201-204) and associated storage device (L230) is selectively disabled until only one transfer device and storage device is utilized, and this remaining device may also be selectively disabled. Because the storage devices (L230) are distributed, each storage device can be smaller than that required for the high-current operation, thereby minimizing the losses associated with high-current switching converters during low-current operation. In another aspect of this invention, the plurality of transfer devices (201-204) is operated at different phases to one another, thereby reducing the ripple associated with high-current operation. In another aspect of this invention, the storage devices (L230) are each sized for efficient operation at a given load level.</p> |
