公开(公告)号：US20030173941A1

公开(公告)日：2003-09-18

申请号：US10100439

申请日：2002-03-18

Applicant: Intersil Americas Inc.

Inventor： Matthew Burdet Harris ,  Robert Haynes Isham

IPC: G05F001/40

CPC classification number: H02M3/156 ,  H02M3/1588 ,  H02M2003/1566 ,  Y02B70/1466

Abstract: A DC-to-DC converter includes a pulse width modulation (PWM) circuit cooperating with at least one power switch for supplying power from a source to a load over a range between a lower limit and an upper limit to thereby control an output voltage for the load. The converter may also include a primary feedback control loop cooperating with the PWM circuit for supplying power to the load between the lower and upper limits based upon the output voltage during normal load transient conditions. The converter may also include at least one override feedback control loop cooperating with the PWM circuit for overriding the primary feedback control loop and supplying power to the load at one of the lower and upper limits based upon the output voltage during a corresponding relatively fast load transient condition. Accordingly, relatively fast load transients can be followed by the converter.

Abstract translation: DC-DC转换器包括与至少一个功率开关配合的脉冲宽度调制（PWM）电路，用于在下限和上限之间的范围内从源向负载供电，从而控制输出电压 负载。 转换器还可以包括与PWM电路配合的主反馈控制回路，用于在正常负载瞬态条件期间基于输出电压向下限和上限之间的负载供电。 转换器还可以包括与PWM电路协作的至少一个覆盖反馈控制环路，用于覆盖主反馈控制回路，并且在相应的相对快速的负载瞬变期间基于输出电压在下限和上限中的一个处向负载供电 条件。 因此，转换器可以跟随相对较快的负载瞬变。