公开(公告)号：WO2015089242A1

公开(公告)日：2015-06-18

申请号：PCT/US2014/069630

申请日：2014-12-10

Applicant: DIALOG SEMICONDUCTOR INC.

Inventor： SHI, Fuqiang ,  KONG, Pengju ,  BUI, Hien ,  SHA, Judy ,  NGUYEN, David ,  DOAN, Duc

IPC: H02M7/00

CPC classification number: H02M3/33515 ,  G01R19/0084 ,  H02M3/335 ,  H02M3/33523

Abstract: A method for estimating an output voltage of a power converter comprises sensing a voltage waveform representative of the output voltage; and detecting a first gap and a second gap. The first gap is between a time when the sensed voltage waveform crosses a first voltage reference and a time when the sensed voltage waveform crosses a second voltage reference at a voltage offset below the first voltage reference. The second gap is between a time when the sensed voltage waveform crosses a third voltage reference and a time when the sensed voltage waveform crosses the second voltage reference, the third voltage referenced at a predetermined voltage above the second voltage reference. Responsive to the first gap exceeding a threshold, a tracking error is computed based on the first gap; and responsive to the first gap not exceeding the threshold, the tracking error is computed based on the second gap.

Abstract translation: 用于估计功率转换器的输出电压的方法包括：感测代表输出电压的电压波形; 以及检测第一间隙和第二间隙。 第一间隙在检测到的电压波形与第一参考电压相交的时间与当感测电压波形在低于第一参考电压的电压偏移下与第二参考电压相交的时间之间。 第二间隙在检测到的电压波形跨越第三参考电压的时间和当感测的电压波形与第二参考电压相交的时间之间时，第三电压以高于第二参考电压的预定电压参考。 响应于超过阈值的第一间隙，基于第一间隙计算跟踪误差; 并且响应于不超过阈值的第一间隙，基于第二间隙计算跟踪误差。