A High-Efficiency, Auto Mode-Hop, Variable-Voltage, Ripple Control Buck Converter

被引：2

作者：

Rokhsat-Yazdi, Ehsan ^{[1
]}

Afzali-Kusha, Ali ^{[1
]}

Pedram, Massoud ^{[2
]}

机构：

[1] Univ Tehran, Sch Elect & Comp Eng, Nanoelect Ctr Excellence, Tehran, Iran

[2] Univ So Calif, Dept Elect Engn, Los Angeles, CA 90089 USA

来源：

JOURNAL OF POWER ELECTRONICS | 2010年 / 10卷 / 02期

关键词：

Auto Mode-Hop; Buck Converter; High-Efficiency; Ripple Control; Variable-Voltage; DESIGN;

D O I：

10.6113/JPE.2010.10.2.115

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：

In this paper, a simple yet efficient auto mode-hop ripple control structure for buck converters with light load operation enhancement is proposed. The converter, which operates under a wide range of input and output voltages, makes use of a state-dependent hysteretic comparator. Depending on the output current, the converter automatically changes the operating mode. This improves the efficiency and reduces the output voltage ripple for a wide range of output currents for given input and output voltages. The sensitivity of the output voltage to the circuit elements is less than 14%, which is seven times lower than that for conventional converters. To assess the efficiency of the proposed converter, it is designed and implemented with commercially available components. The converter provides an output voltage in the range of 0.9V to 31V for load currents of up to 3A when the input voltage is in the range of 5V to 32V. Analytical design expressions which model the operation of the converter are also presented. This circuit can be implemented easily in a single chip with an external inductor and capacitor for both fixed and variable output voltage applications.

引用

页码：115 / 124

页数：10

共 28 条

[1]

ARBETTER B, 1995, IEEE POWER ELECTRON, P103, DOI 10.1109/PESC.1995.474799

[2] Self oscillating control of a synchronous DC-DC buck converter [J].

Baranwal, SK ;

Patra, A ;

Culpepper, B .

PESC 04: 2004 IEEE 35TH ANNUAL POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-6, CONFERENCE PROCEEDINGS, 2004, :3671-3674

[3]

BARRADO A, 2004, IEEE INT C POW EL SE, V2, P1329

[4] Design of voltage-mode hysteretic controllers for synchronous buck converters supplying microprocessor loads [J].

Castilla, M ;

de Vicuña, LG ;

Guerrero, JM ;

Matas, J ;

Miret, J .

IEE PROCEEDINGS-ELECTRIC POWER APPLICATIONS, 2005, 152 (05) :1171-1178

[5] Techniques for aggressive supply voltage scaling and efficient regulation [J].

Dancy, A ;

Chandrakasan, A .

PROCEEDINGS OF THE IEEE 1997 CUSTOM INTEGRATED CIRCUITS CONFERENCE, 1997, :579-586

[6] Power losses and efficiency of buck PWM DC-DC power converter [J].

Das, N ;

Kazimierczuk, MK .

Proceedings: Electrical Insulation Conference and Electrical Manufacturing Conference, 2005, :417-423

[7]

Gildersleeve M, 2002, 2002 IEEE ASIA-PACIFIC CONFERENCE ON ASIC PROCEEDINGS, P153, DOI 10.1109/APASIC.2002.1031555

[8]

GUPTA P, 2005, P IEEE ISCAS, V4, P3063

[9] Novel control design for the buck converter [J].

Ioannidis, G ;

Kandianis, A ;

Manias, SN .

IEE PROCEEDINGS-ELECTRIC POWER APPLICATIONS, 1998, 145 (01) :39-47

[10] A high-efficiency fully digital synchronous buck converter power delivery system based on a finite-state machine [J].

Kang, DW ;

Kim, YB ;

Doyle, JT .

IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, 2006, 14 (03) :229-240

← 1 2 3 →