A synthetic ripple buck converter with dynamic hysteretic band modulation

Author

Tsai, C.T. ; Chou, H.P.

Author_Institution

Dept. of Eng. & Syst. Sci., Nat. Tsing Hua Univ., Hsinchu, Taiwan

fYear

2009

fDate

2-5 Nov. 2009

Firstpage

170

Lastpage

174

Abstract

This paper presents an integrated DC-DC buck converter using the synthetic ripple hysteresis control scheme with a fast transient path to define the boundary of hysteresis band. The hysteresis band and switching frequency depend on load current changes; therefore, it accelerates regulation and reduces overshoot. Full chip simulation results indicated output voltage recovery time is shortened within 10 Â¿s under load current condition between 100 mA to 500 mA. The present work requires no external compensation capacitors and can be implemented with integrated technology for on-chip applications.

Keywords

DC-DC power convertors; hysteresis; DC-DC buck converter; current 100 mA to 500 mA; dynamic hysteretic band modulation; hysteresis band; on-chip applications; switching frequency; synthetic ripple buck converter; synthetic ripple hysteresis control scheme; Buck converters; Capacitors; Circuits; Frequency; Hysteresis; MOSFETs; Pulse width modulation; Pulse width modulation converters; Signal generators; Voltage control; Fast transient; Hysteresis; Hysteretic Band Modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drive Systems, 2009. PEDS 2009. International Conference on

Conference_Location

Taipei

Print_ISBN

978-1-4244-4166-2

Electronic_ISBN

978-1-4244-4167-9

Type

conf

DOI

10.1109/PEDS.2009.5385874

Filename

5385874