Title :
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
fDate :
May 30 2011-June 3 2011
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;
Conference_Titel :
Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on
Conference_Location :
Jeju
Print_ISBN :
978-1-61284-958-4
Electronic_ISBN :
2150-6078
DOI :
10.1109/ICPE.2011.5944476
