System-on-chip preventing discharge of bootstrap capacitor of high-side drivers

Integrated high-side switches are omnipresent in automotive integrated circuits (airbags, power control units, alternator regulators, window lift applications, injectors control…). In non-SOI technologies, parasitic NPN and PNP transistors can degrade IC performance especially when EMC or ESD disturbances are applied to the circuit. This paper presents a small system on chip solution providing remarkably high EMC/ESD susceptibility performance for high-side switch drivers while increasing IC performance during normal operation using a wide range of external components.