TY - JOUR

T1 - Ultra-Fast Tracking Power Supply with 4th order Output Filter and Fixed-Frequency Hysteretic Control

A1 - Høyerby,Mikkel Christian Wendelboe

A1 - Andersen,Michael Andreas E.

AU - Høyerby,Mikkel Christian Wendelboe

AU - Andersen,Michael Andreas E.

PB - I E E E

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

KW - comparator modeling

KW - self-oscillating

KW - 4th order filter

KW - hysteretic control

KW - envelope tracking

KW - high-bandwidth

U2 - 10.1109/TPEL.2008.2002038

DO - 10.1109/TPEL.2008.2002038

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

SN - 0885-8993

IS - 5

VL - 23

SP - 2387

EP - 2398

ER -