Title :
A study on radiation effects on PWM-IC controller of DC/DC power buck converter
Author :
Young Hwan Lho ; Yeu Sung Hwang ; Sang Yong Lee
Author_Institution :
Dept. of Railroad Electr. & Inf. Commun., Woosong Univ., Daejeon, South Korea
Abstract :
DC-DC converter is composed of a PWM-IC (pulse width modulation-integrated circuit) controller, a MOSFET (metal-oxide semiconductor field effect transistor), inductor, capacitor, etc. PWM is applied to control and regulate the total output voltage. It is shown that the variation of threshold voltage at MOSFET and the offset voltage increase caused by radiation effects make the PWM pulse unstable. Radiation gives the main influence on the changes in the electrical characteristics of PWM-IC and MOSFET. In the PWM operation, the missing pulses, the changes in pulse width, and a change of the output waveform are studied by the simulation program with integrated circuit emphasis (SPICE) and compared with experiments.
Keywords :
DC-DC power convertors; MOSFET circuits; PWM power convertors; SPICE; circuit simulation; control engineering computing; power capacitors; power inductors; voltage control; DC-DC power buck converter; MOSFET; PWM pulse unstability; PWM-IC controller; SPICE; capacitor; inductor; integrated circuit emphasis; metal-oxide semiconductor field effect transistor; offset voltage; pulse width modulation-integrated circuit controller; radiation effects; simulation program; threshold voltage variation; total output voltage regulation; Pulse width modulation; Switched-mode power supply; DC/DC buck converter; MOSFET; MOSFET Drive IC; OP-Amp.; PWM-IC; SMPS; radiation effects; radiation hardening;
Conference_Titel :
Control, Automation and Systems (ICCAS), 2013 13th International Conference on
Conference_Location :
Gwangju
Print_ISBN :
978-89-93215-05-2
DOI :
10.1109/ICCAS.2013.6704221
