An Enhanced Anti-surge Circuit for New Energy Vehicle Electronics System

Abstract This paper presents an input surge protection circuit for automotive electronics systems with adjustable overvoltage threshold suitable high voltage applications. Compared the conventional circuit, it boasts a new high-voltage bandgap reference design without pre-regulation, which takes up less space and can be used on limited PCB board, expanding practical application range of chip. The gate monitor gate-source power MOS in real-time control charge pump’s operating mode to improve system’s safety. simulation adopt 0.18 μm 5V/25V BCD process. results show that varies by only 0.38 mV 3.5 V-25 V. quiescent current is 146 uA at 5 V supply voltage. turned quickly within 50 us. response time 599 ns, permitting shut down when occurs.