Parallel 5x Step-Up SC DC-DC converter for power efficiency improvement

Author

Pongswatd, Sawai ; Smerpituk, Krit ; Eguchi, Kei ; Sasaki, Hirofumi

Author_Institution

Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok, Thailand

fYear

2011

fDate

13-18 Sept. 2011

Firstpage

854

Lastpage

857

Abstract

In switched-capacitor converter, the fluctuation of on-resistance effects power efficiency in proportion to the decrease of output load. This paper presents switched-capacitor (SC) DC-DC converter that parallel-connected to improve the power efficiency. The converter utilizes solar energy for industrial wireless transmitter. It can be supplied by its internal battery in combination with the proposed converter for long battery runtime. A Rosemount wireless transmitter from Emerson Process Management Company is used as a target application example in process measurement. The proposed converter is designed for receiving 1.5 V solar cells and powering 7.5 V connect in parallel with wireless transmitter battery. The validity of the theoretical analyses is confirmed by SPICE simulations and experimental results. The derived formulas will be helpful to estimate circuit characteristics. Moreover, SPICE simulation values and experimental results agree well with theoretical results.

Keywords

DC-DC power convertors; capacitor switching; energy conservation; radio transmitters; solar cells; solar power; switching convertors; Emerson Process Management Company; Rosemount wireless transmitter; SPICE simulations; industrial wireless transmitter; on-resistance effects; parallel DC-DC converter; power efficiency improvement; solar cells; solar energy; switched capacitor converter; voltage 1.5 V; voltage 7.5 V; wireless transmitter battery; Batteries; Communication system security; Equivalent circuits; Magnetic field measurement; SPICE; Transmitters; Wireless communication; Converter; Process Measurement; Wireless Transmitter; parallel-connected; switched-capacitor circuit;

fLanguage

English

Publisher

ieee

Conference_Titel

SICE Annual Conference (SICE), 2011 Proceedings of

Conference_Location

Tokyo

ISSN

pending

Print_ISBN

978-1-4577-0714-8

Type

conf

Filename

6060627