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This paper presents a fast-response full-wave inductor current sensor for a DC-DC converter operating in 10 MHz switching frequency. It can achieve high sensing accuracy better than 93% with inductor current varying from 100mA to 2.1 A. Also, the time response of proposed current sensor has been greatly improved and achieved < 8 ns for sensing full wave inductor current with a low transition spiking.
This paper presents a zero-current detector (ZCD) applied in high-frequency synchronous buck DC-DC converters to enable DCM/PFM operation mode. The proposed ZCD is designed based on power efficient synchronous comparators operating in different frequency, of which coarse comparator predetermines operating period of fine comparator while inductor current zero-crossing is accurately detected by fine...
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