Title :
A novel voltage-control scheme for low-voltage DC-DC converters with fast transient recovery
Author :
Lee, Hoi ; Mok, Philip K T ; Ki, Wing-Hung
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong
Abstract :
This paper proposes a novel voltage-control scheme to improve the slow dynamic response of the conventional pulse-width-modulation (PWM) continuous-current-mode (CCM) voltage-programming DC-DC converter. By introducing a high-pass notch filter in the control loop of the conventional converter, the unity gain bandwidth of the loop gain is enhanced and the system Q value is decreased. To demonstrate the improvement in the transient response, voltage-programming PWM CCM DC-DC converters with both the conventional and the proposed control schemes are designed and simulated. Results show that the dynamic response has 10 times improvement
Keywords :
DC-DC power convertors; PWM power convertors; Q-factor; dynamic response; low-power electronics; notch filters; transient response; PWM; Q value; continuous-current-mode operation; control loop; dynamic response; high-pass notch filter; low-voltage DC-DC converters; transient recovery; transient response; unity gain bandwidth; voltage-control scheme; voltage-programming converter; Automatic voltage control; Bandwidth; Buck converters; DC-DC power converters; Dynamic programming; Filters; Pulse width modulation; Pulse width modulation converters; Transient response; Voltage control;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.857076
