CONTROLLING MODULE, SWITCH-MODE POWER SUPPLY APPARATUS, AND PEAK CURRENT MODE CONTROLLING METHOD OF A SWITCH-MODE POWER SUPPLY APPARATUS

• Main Author: LEE Sheng-Ta
• Format: Patent
• Language: English
• Published: 28.09.2017
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

A controlling module includes a current-command generating unit for generating reference current signal based on an output voltage of a power conversion module, a current sensor configured to sense an inductor current of the power conversion module and generate current sense signal, a current comparator for generating current compare signal when the current sense signal equaling to the reference current signal, and an off-time controller for generating off-time control signal based on an input voltage and the output voltage of the power conversion module. The controlling module further includes a time-base counter and a peak-current controlling unit. The time-base counter receives the current compare signal and the off-time control signal, and generates a trigger signal when an off-time interval established by the off-time control signal elapses. The peak-current controlling unit makes a power switch of the power conversion module in a conduction state based on the trigger signal.