Ultra-Fast Tracking Power Supply with 4th order Output Filter and Fixed-Frequency Hysteretic Control

Mikkel Christian Wendelboe Høyerby, Michael Andreas E. Andersen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A practical solution is presented for the design of a non-isolated DC/DC power converter with very low output ripple voltage and very fast output voltage step response. The converter is intended for use as an envelope tracking power supply for an RFPA (Radio Frequency Power Amplifier) in a Tetra2 base station. A simple and effective fixed-frequency hysteretic control scheme for the converter (buck with 4th order output filter) is developed and analyzed. The proposed approach is verified experimentally by a 500W output prototype, capable of delivering any voltage in the range of 10-30V within 10μs with 10mVpp of output ripple and efficiencies in the 88- 95% range.
Original languageEnglish
JournalIEEE Transactions on Power Electronics
Volume23
Issue number5
Pages (from-to)2387-2398
ISSN0885-8993
DOIs
Publication statusPublished - 2008

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