Spaceflight wide-input high-reliability starting power supply circuit

• Main Authors: LIU DONG, ZHOU LIULIANG, JI SHANGZHI, HAN YUE, CHEN GUANGSI, LEI YINGJUN, LIU YONG
• Format: Patent
• Language: Chinese; English
• Published: 06.06.2023
• 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 spaceflight wide-input high-reliability starting power supply circuit which comprises a bootstrap circuit, a flyback voltage device, an output filter circuit, a modulation driving circuit, a driving chip power supply circuit and a self-turn-off circuit. The bootstrap circuit provides voltage of the first few switching periods for a driving chip in the modulation driving circuit in a bootstrap mode. The modulation driving circuit is used for outputting a modulation signal to modulate a switch of the switch tube; when the switch tube is turned on, the flyback voltage device converts wide input high voltage into 21V low voltage; the output filter circuit is used for rectifying and filtering 21V low voltage and establishing a 21V low-voltage bus; the driving chip power supply circuit converts the 21V low-voltage bus voltage into 12V direct current and supplies power to the modulation driving circuit; the automatic turn-off circuit modulates the switch tube to be turned off when the 21V l