Over-temperature protection device for power supply

• Main Authors: DING JIAN, ZHAO SHUNHUI, LIAO SHIBO
• Format: Patent
• Language: Chinese; English
• Published: 19.03.2024
• 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; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The utility model belongs to the technical field of power supplies, and relates to an over-temperature protection device for a power supply, which comprises an AC voltage input, an EMI circuit, a rectification filter circuit, a power control switch, a PWM control circuit, a PWM power supply control circuit, an output rectification filter circuit, a feedback control circuit, a DC voltage output, an over-temperature protection circuit, a transformer T1 and an optocoupler U2. The AC voltage input, the EMI circuit, the rectification filter circuit, the transformer T1, the output rectification filter circuit and the DC voltage output are connected in sequence, the rectification filter circuit is further connected with the power control switch and the PWM power supply control circuit, the PWM power supply control circuit is further connected with the PWM control circuit, the PWM control circuit is further connected with the power control switch, the transformer T1 and the optocoupler U2, and the optocoupler U2 is c