Peak value current detection circuit and power converter

• Main Author: LI MAOXU
• Format: Patent
• Language: Chinese; English
• Published: 24.05.2017
• 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

The invention discloses a peak value current detection circuit applied to a power converter; the peak value current detection circuit comprises a first switch, a peak value capacitor and a second switch, wherein said units are connected in series between nodes and earthing ends between a first power switch tube and a second power switch tube; a third switch is connected between the peak value capacitor and an output capacitor; voltage signals on two ends of the peak value capacitor are peak value voltage signals; a comparator comprises a first input end, a second input end and an output end, wherein the first input end is used for receiving a reference value, the second input end is connected with the peak value capacitor, and the output end is used for outputting a peak value current detection signal. The invention also provides the power converter; the peak value capacitor and the first to third switches are conducted or closed so as to obtain the peak value voltage on two ends of an inductor; the peak valu