Journal article
Ultra-Fast Tracking Power Supply with 4th order Output Filter and Fixed-Frequency Hysteretic Control
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.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2008 |
| Pages: | 2387-2398 |
| ISSN: | 19410107 and 08858993 |
| Types: | Journal article |
| DOI: | 10.1109/TPEL.2008.2002038 |
| ORCIDs: | Andersen, Michael Andreas E. |
4th order filter comparator modeling envelope tracking high-bandwidth hysteretic control self-oscillating
Bandwidth Base stations Comparator modeling DC-DC power convertors Filters Hysteresis Power supplies Prototypes Quadrature amplitude modulation Radio frequency Radiofrequency amplifiers TETRA enhanced data service base station Voltage control envelope tracking power supply fixed-frequency hysteretic control fourth-order filter fourth-order output filter nonisolated dc-dc power converter power 500 W power filters radio frequency power amplifier radiofrequency amplifiers ultrafast tracking power supply voltage 10 V to 30 V
