Constant on-time switching converters with ultrasonic mode determination circuit and control methods thereof
A control method used in a constant on-time switching converter includes: judging whether the switching converter enters into an ultrasonic mode; turning ON the low-side switch to discharge the output capacitor when the switching converter enters into the ultrasonic mode; generating an additional slope compensation signal during the discharge of the output capacitor; comparing a feedback signal indicative of the output voltage of the switching circuit with the sum of a reference voltage and the additional slope compensation signal; turning OFF the low-side switch and turning ON the high-side switch when the feedback signal decreases to reach the sum of the reference voltage and the additional slope compensation signal.
CHENGDU MONOLITHIC POWER SYSTEMS CO., LTD.
H H H Y
H02M H02M H02M Y02B
inventional inventional additional additional
Wangmiao Lijie Qian Chia-Hsin Wenbin
Hu Jiang Ouyang Chang Lu