Modulated Digitally Controlled Non-Inverting Buck-Boost Converter for WCDMA RF Power Amplifiers

被引：14

作者：

Paul, Rajarshi ^{[1
]}

Corradini, Luca ^{[1
]}

Maksimovic, Dragan ^{[1
]}

机构：

[1] Univ Colorado, Colorado Power Elect Ctr, ECE Dept, Boulder, CO 80309 USA

来源：

APEC: 2009 IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION, VOLS 1- 4 | 2009年

关键词：

D O I：

10.1109/APEC.2009.4802709

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：

This paper focuses on the non-inverting buck-boost converter supplying an adjustable DC voltage to a WCDMA RF power amplifier (RFPA) in order to improve the system efficiency under different transmitted RF power levels. It is shown that precise output voltage positioning and low output voltage ripple over a wide output voltage range, including buck, boost and buck/boost transition modes, can be accomplished using - modulation in combination with a small, low-power, low-resolution DPWM core. A two-mode digital controller is presented, in which the compensator parameters are changed upon buck/boost mode transitions in order to improve closed-loop dynamic performance. Results are verified on an experimental test bed that consists of a prototype 0.5 in CMOS chip that integrates power MOSFETs, drivers and dead-time control logic, and the digital controller implemented on an FPGA. The worst case output voltage ripple over buck, boost and mode transition region is within 35mV and the output voltage transients meet the WCDMA RFPA settling time requirements.

引用

页码：533 / 539

页数：7

共 14 条

[1]

[Anonymous], USER EQUIPMENT UE RA

[2]

BEZOOIJEN AV, 2005, IEEE T CIRCUITS-I, V52, P2101

[3]

Chen JQ, 2001, IEEE POWER ELECTRON, P736, DOI 10.1109/PESC.2001.954206

[4]

Gaboriault M, 2004, APPL POWER ELECT CO, P1411

[5] Multibit Σ-Δ PWM digital controller IC for DC-DC converters operating at switching frequencies beyond 10 MHz [J].

Lukic, Zdravko ;

Rahman, Nabeel ;

Prodic, Aleksandar .

IEEE TRANSACTIONS ON POWER ELECTRONICS, 2007, 22 (05) :1693-1707

[6] Small-signal discrete-time modeling of digitally controlled PWM converters [J].

Maksimovic, Dragan ;

Zane, Regan .

IEEE TRANSACTIONS ON POWER ELECTRONICS, 2007, 22 (06) :2552-2556

[7]

*MAX, AN1205 MAX

[8]

Midya P., 2004, IEEE Power Electronics Letters, V2, P131, DOI 10.1109/LPEL.2004.840739

[9] Quantization Noise Shaping in Digital PWM Converters [J].

Norris, Mark ;

Platon, Lazaro Marco ;

Alarcon, Eduard ;

Maksimovic, Dragan .

2008 IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-10, 2008, :127-+

[10]

Paul R, 2008, IEEE POWER ELECTRON, P3741, DOI 10.1109/PESC.2008.4592538

← 1 2 →