Ultrafast Tracking Power Supply With Fourth-Order Output Filter and Fixed-Frequency Hysteretic Control

被引：58

作者：

Hoyerby, Mikkel C. W. ^{[1
]}

Andersen, Michael A. E. ^{[2
]}

机构：

[1] Motorola Inc, DK-2600 Glostrup, Denmark

[2] Tech Univ Denmark, Dept Elect Engn, DK-2800 Lyngby, Denmark

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2008年 / 23卷 / 05期

关键词：

Comparator modeling; envelope tracking; fourth-order filter; high-bandwidth; hysteretic control; self-oscillating;

D O I：

10.1109/TPEL.2008.2002038

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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 a radio frequency power amplifier (RFPA) in a TETRA enhanced data service (TEDS) base station. A simple and effective fixed-frequency hysteretic control scheme for the converter (buck with fourth-order output filter) is developed and analyzed. The proposed approach is verified experimentally by a 500 W output prototype, capable of delivering any voltage in the range of 10-30 V within 10 mu s with 10 mVpp of output ripple and efficiencies in the 88%-95% range.

引用

页码：2387 / 2398

页数：12

共 23 条

[1]

Ahmed M, 2003, IEEE POWER ELECTRON, P634

[2]

GRANT D, Patent No. 6348780

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