Current sensing methods for standby power control of digital-controlled DC/DC converter

Author

Lai, Yen-Shin ; Su, Zih-Jie ; Yeh, Chia-An ; Takahashi, Fumikazu ; Hamaogi, Masahiro

Author_Institution

Nat. Taipei Univ. of Technol., Taipei, Taiwan

fYear

2011

fDate

May 30 2011-June 3 2011

Firstpage

1742

Lastpage

1748

Abstract

The main theme of this paper is to study the current sensing methods for standby power reduction control of digital-controlled DC/DC converter. These methods include using transformer of full-bridge converter, coupling inductor and ORing MOSFET. The most suitable sensing method was verified with a digital-controlled 500 W class DC/DC converter (input/output voltage: 400 V/12 V). Experimental results derived from digital-controlled DC/DC converter using the TI DSP (TMS320F2812) as the control platform show that current sensed by voltage across ORing MOSFET method provides superb solution. This method offers linear relationship between output voltage of sensing circuit and load current while not causing response delay under standby conditions and thereby truly reflecting accurate standby conditions.

Keywords

DC-DC power convertors; MOSFET; power control; ORing MOSFET; TI DSP; coupling inductor; current sensing methods; digital-controlled dc-dc converter; full-bridge converter; power 500 W; standby power reduction control; transformer; Bridge circuits; DC-DC power converters; Inductors; MOSFET circuits; Pulse width modulation; Sensors; Voltage control; Current Sensing; DC/DC Converter; Digital Control; Standby Power Control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on

Conference_Location

Jeju

ISSN

2150-6078

Print_ISBN

978-1-61284-958-4

Electronic_ISBN

2150-6078

Type

conf

DOI

10.1109/ICPE.2011.5944476

Filename

5944476