Title :
A new digital control DC-DC converter with peak current -injected control
Author :
Kurokawa, Fujio ; Sukita, Shohei ; Shibata, Yuichiro ; Yokoyama, Tomoki ; Sasaki, Masahiro ; Mimura, Yasuhiro
Author_Institution :
Dept. of Electr. & Electron. Eng., Nagasaki Univ., Nagasaki
Abstract :
This paper presents a new digital control circuit which is able to detect the peak switch current of the high frequency switching dc-dc converter. In this proposed digital control circuit, the peak current-injected control is realized using the combination of the simple dual pulse width modulation analog-to-digital signal converter and the programmed delay circuit. In 100 kHz digitally controlled dc-dc converter, it is seen in simulation that the proposed method has no overshoot of the output voltage and the convergence time that the output voltage is settled to steady-state is only 30 mus. The difference between the transient time of the proposed circuit and that of the conventional method is an order of magnitude. Furthermore, the ratio of resolution of the DPWM generator against the output voltage is 0.27% and is satisfied to apply the commercial power supply unit.
Keywords :
DC-DC power convertors; PWM power convertors; analogue-digital conversion; digital control; switching convertors; analog-to-digital signal converter; digital control; peak current-injected control; programmed delay circuit; pulse width modulation; switching dc-dc converter; transient time; DC-DC power converters; Digital control; Digital modulation; Digital-to-frequency converters; Frequency conversion; Pulse circuits; Pulse width modulation converters; Switches; Switching circuits; Switching converters;
Conference_Titel :
Telecommunications Energy Conference, 2008. INTELEC 2008. IEEE 30th International
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2055-1
Electronic_ISBN :
978-1-4244-2056-8
DOI :
10.1109/INTLEC.2008.4664113