| IP개요 |
The proposed WV-AZCD (Wide Voltage-Accurate Zero Current Detector) buck converter suppresses body-diode conduction and inductor reverse current during dead time. The proposed circuit detects the accurate zero current by self - calculating the time ratio of turn on time of PMOS and NMOS according to the output voltage range. The proposed WV-AZCD improves the efficiency of zero-current detection by reducing the power loss caused by transients. DC-DC buck converter with accurate zero-current detector operating at wide voltage was designed using 0.18um CMOS process. Designed circuit worked at 1.8V supply voltagae and 1MHz switching frequency. Simulation results show that the output voltage is between 0.6V and 1.4V with a precisely controlled switch time during transient
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