Title :
Impact of current sensing resistor on required MOSFET aspect ratio in PWM converters
Author :
Bryant, Brad ; Kazimierczuk, Marian K.
Author_Institution :
Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA
Abstract :
This paper examines the impact of a current sensing resistor used in current-mode control of PWM converters on MOSFET aspect ratio. The results can also be applied to the impact of source parasitic resistance in a power MOSFET. These resistances introduce significant error in the required aspect ratio to achieve a desired maximum current capability. Experimental results are presented showing the validity of the theoretical results
Keywords :
DC-DC power convertors; MOSFET; PWM power convertors; electric current control; electric resistance; resistors; MOSFET aspect ratio; boost PWM DC/DC power converters; current sensing resistor impact; current-mode control; isolated PWM DC/DC power converters; maximum current capability; source parasitic resistance; source resistance effect; Equations; MOSFET circuits; Power MOSFET; Pulse width modulation; Pulse width modulation converters; Resistors; Switches; USA Councils; Virtual colonoscopy;
Conference_Titel :
Circuits and Systems, 2001. MWSCAS 2001. Proceedings of the 44th IEEE 2001 Midwest Symposium on
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-7150-X
DOI :
10.1109/MWSCAS.2001.986348
