Abstract
This paper describes the derivation of a practical solution to designing a medium-power non-isolated DC/DC power converter with very low output ripple voltage and very high output voltage slew-rate capability. The converter is intended for powering and efficiency-optimizing an RFPA (Radio Frequency Power Amplifier) in a communications system base station. A simple and effective analog control scheme for the converter (buck with 4th order output filter) is developed, along with an accurate linear model The proposed approach is verified experimentally by a 500W output prototype, capable of greater than 1 V//spl mu/s slew rate with 40mVpp of output ripple and efficiency above 90%.
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