| 摘要 |
PROBLEM TO BE SOLVED: To improve precision of transient state or enhance reliability and to realize power saving, while reducing the size by improving the operating characteristics of an output regulator. SOLUTION: The duty cycle limiter limits the transfer of energy between an input source and the regulated output of an output regulator. The output regulator has regulator characteristics, and a calculated duty cycle for controlling transfer of energy between the input source and the regulated output. The duty cycle limiter comprises a digital controller, generates a reference level, and compares the regulator characteristics of the output regulator with the reference level thus determining a maximum duty cycle. The digital controller controls the reference level, with frequency at least equal to the switching frequency of the output regulator. The digital controller limits the calculated duty cycle to the maximum duty cycle. COPYRIGHT: (C)2006,JPO&NCIPI
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