Please use this identifier to cite or link to this item: http://drsr.daiict.ac.in//handle/123456789/238
Title: Accurate on-chip current sensing technique for Buck converter
Authors: Parikh, Chetan D.
Jain, Priyanka
Keywords: Pulse circuits
Voltage converters
DC-to-DC converters
Field effect transistors
Issue Date: 2009
Publisher: Dhirubhai Ambani Institute of Information and Communication Technology
Citation: Jain, Priyanka (2009). Accurate on-chip current sensing technique for Buck converter. Dhirubhai Ambani Institute of Information and Communication Technology, xii, 62 p. (Acc.No: T00201)
Abstract: Current mode bucks converters have many advantages over voltage mode control such automatic over-current protection, Better stability, better line regulation and faster dynamic response. Many different current sensing techniques have been developed and implemented sense the inductor current and use it a feedback loop to regulate the output voltage. Current sensing circuit needs to be highly accurate so as to have good line and load regulation minimum output voltage ripple. The proposed current sensing technique uses a cur mirror (Mp1 and Ma) to mirror the current of the transistor (Mp1) to Ma (with a w ratio of 10000:1, so that carried by Ma, and hence its power dissipation. Is small). Sensed current is converted to voltage using a resistor. Which is used in the feedback loo1 control the width of the pulses? The accuracy of the proposed circuit is98% which gives regulation of 0.8386% and load regulation of 0.3115%. The output voltage ripple of the cur is 10mV.
URI: http://drsr.daiict.ac.in/handle/123456789/238
Appears in Collections:M Tech Dissertations

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