Title :
Design of a green mode PWM control IC
Author :
Hsu, Hung-Da ; Liang, Tsorng-Juu ; Liu, Bin-Da ; Chen, Kai-Hui
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng-Kung Univ., Tainan
fDate :
Nov. 30 2008-Dec. 3 2008
Abstract :
To decrease the power consumption of a switching power supply, the most effective approach is to lower the switching frequency. Hence, the current mode pulse-width-modulation (PWM) controller used in a switching regulator must be capable of frequency modulation at light-load condition. The green mode circuit is designed in proposed current mode PWM control IC with the concept of off-time modulation. The switching frequency reduction and switch losses will be proportion to the load decrease at light-load condition. Also, the leading edge blanking (LEB), soft start, slope compensation, and over voltage protection (OVP) functions are integrated into the proposed chip.
Keywords :
PWM power convertors; integrated circuits; low-power electronics; switched mode power supplies; switching convertors; frequency modulation; green mode circuit; leading edge blanking; over voltage protection; power consumption; pulse-width-modulation controller; switch losses; switching frequency; switching power supply; switching regulator; Energy consumption; Frequency modulation; Lighting control; Power supplies; Pulse width modulation; Pulsed power supplies; Regulators; Space vector pulse width modulation; Switches; Switching frequency;
Conference_Titel :
Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on
Conference_Location :
Macao
Print_ISBN :
978-1-4244-2341-5
Electronic_ISBN :
978-1-4244-2342-2
DOI :
10.1109/APCCAS.2008.4746410
