In this architecture, the charging inlet control system integrates with DCDC and host subsystems inside the OBC combo. Part of the integration is based on the mechanical and physical structures. Gradually, these subsystems are controlled by a multicore MCU, achieving integration in physics and control.

The main MCU of the charging inlet control system, not only covers the function of charging detection, but also detects the low voltage signals. The MCU takes part of the workload for monitoring the host and sampling the DC-DC. The functional safety level that the system can meet is affected by other subsystems, and therefore, the safety-level usually requires an elevation to meet the automotive requirements of ASIL B through ASIL D.

This structure is often witnessed in the Chinese market. Since the charging inlet control system has fewer functions and lower functional safety and cybersecurity requirements, achieving integration is easier. This architecture effectively utilizes MCU resources and helps meet integration trends. Additionally, this architecture allows the reuse of charging signal detection circuits, and auxiliary power rails in the OBC combo, and reduces signal and power wiring, which can provide cost benefits.