Anti-interference circuit of vehicle-mounted terminal power supply

• Main Authors: ZHAO PENGFEI, CHAI MINGMING, XIONG PIAOYANG, HAN FENGYANG
• Format: Patent
• Language: Chinese; English
• Published: 09.05.2023
• 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 utility model provides an anti-interference circuit of a vehicle-mounted terminal power supply. The anti-interference circuit comprises an anti-reverse connection protection circuit, a surge protection circuit, an EMI filter circuit, a power supply module circuit and an output filter circuit. The EMI filter circuit comprises a magnetic bead, four filter capacitors, a common mode inductor, a differential mode inductor and a fifth filter capacitor. The power supply module circuit comprises a power supply voltage stabilizing chip, a fly-wheel diode, a first resistor, a sixth filter capacitor, a filter energy storage capacitor and an energy storage inductor. The output filter circuit comprises a second TVS tube, a second resistor and an eighth filter capacitor. According to the vehicle-mounted terminal power supply anti-interference circuit of the utility model, the EMI filter circuit is designed for the power supply voltage stabilization chip, and the output of the power supply module is optimized, and there