Lecture 2 - EEL 5245 Power Electronics I Lecture Notes II NonIsolated Dc-dc Converters School of Electrical Engineering and Computer Science

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Lecture Notes II: Non- Isolated Dc-dc Converters School of Electrical Engineering and Computer Science University of Central Florida
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Overview of DC Overview of DC -DC Conversion DC Conversion – Linear Regulators: Regulated vs. Unregulated Linear Regulators: Regulated vs. Unregulated – Overview of Pulse Width Modulation Converters Overview of Pulse Width Modulation Converters PWM Converter Analysis Principles/Tools PWM Converter Analysis Principles/Tools – Duty Ratio Duty Ratio – Steady Steady -State State – Inductor Volt Inductor Volt -Second Balance Second Balance – Capacitor charge balance Capacitor charge balance – Small Ripple Approximation Small Ripple Approximation – Conservation of Power Conservation of Power
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(+) Very simple (-) No control (-) Cannot respond to line and load variation (-) Low efficiency
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(+) Simple and cheap (+) Regulated output (-) Low efficiency in o V V Eff =
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t “Cheap and dirty” solution Many IC’s available commercially Popular for very low power, low cost applications
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(+) Theoretically lossless!
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This note was uploaded on 10/05/2010 for the course EEL 5245 taught by Professor Abdel-rahman during the Fall '10 term at University of Central Florida.

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Lecture 2 - EEL 5245 Power Electronics I Lecture Notes II NonIsolated Dc-dc Converters School of Electrical Engineering and Computer Science

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